Dermatología en Costa Rica

Thursday, December 30, 2021

Efficacy and Safety of Ustekinumab in Behçet's Disease

Journal Scan / Research · December 29, 2021


Journal of the American Academy of Dermatology

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Sunday, December 19, 2021

Journal Scan / Research · December 19, 2021 Growth Factors for Treating Chronic Venous Leg Ulcers Wound Repair and Regeneration



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Abstract

Chronic venous leg ulcers (VLU) are wounds that commonly occur due to venous insufficiency. Many growth factors have been introduced over the past two decades to treat VLU. This systematic review and meta-analysis evaluates the impact of growth factor treatments of VLU in comparison to control for complete wound healing, percent reduction in wound area, time to wound healing, and adverse events. A systematic review and meta-analysis of randomised trials was conducted. MEDLINE and EMBASE were searched up to December 2020. Studies were included if they compared a growth factor versus placebo or standard care in patients with VLU. From 1645 articles, 13 trials were included (n = 991). There was a significant difference between any growth factor and placebo in complete wound healing (P = 0.04). Any growth factor compared to placebo significantly increased the likelihood of percent wound reduction by 48.80% (P = <0.00001). There was no difference in overall adverse event rate. Most comparisons have low certainty of evidence according to Grading of Recommendations, Assessment, Development, and Evaluation. This meta-analysis suggests that growth factors have a beneficial effect in complete wound healing of VLU. Growth factors may also increase percent reduction in wound area. The suggestion of benefit for growth factors identified in this review is not a strong one based on the low quality of evidence.

Additional Info

Wound Repair and Regeneration
Growth factors for treating chronic venous leg ulcers: A systematic review and meta-analysis
Wound Repair Regen 2021 Nov 16;[EPub Ahead of Print], Y Lee, MH Lee, SA Phillips, MC Stacey 

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Tuesday, December 14, 2021

Staging in skin cancer

SETTING THE STAGE


Changes to TNM system enhance prognostication for cutaneous cancers

Feature

By Jan Bowers, Contributing Writer, October 1, 2021

Banner for setting the stage

When French surgeon Pierre Denoix, MD, pioneered the development of a simple staging system for breast cancer in the 1940s and '50s, he opened a path for physicians treating many other types of cancer to plan their management strategy based on a clear set of parameters. Dr. Denoix conceived of the system known as TNM, which specifies the size and invasiveness of the primary tumor; the status of regional lymph nodes; and the presence or absence of distant metastases. Building on his work, medical societies such as the Union for International Cancer Control, the American Cancer Society, the International College of Radiology, and the American College of Surgeons organized the precursor to the group now known as the American Joint Committee on Cancer (AJCC). Comprised of 22 member organizations, the AJCC has published eight editions of its Cancer Staging Manual; the most recent edition was implemented in 2018. 

The AJCC 8th edition (AJCC 8) includes updated information for the staging of cutaneous melanoma and for cutaneous squamous cell carcinoma (cSCC) of the head and neck. DermWorld spoke with dermatologists who specialize in the diagnosis and treatment of cutaneous malignancies and discussed the changes in AJCC 8 and their significance in the management of melanoma and SCC. 

Melanoma

The panel of experts appointed by the AJCC to revise the melanoma staging criteria for AJCC 8 worked from a database of more than 46,000 patients from 10 centers worldwide with stages I, II, and III melanoma diagnosed since 1998. In addition to drawing on a larger dataset than was available for the 7th edition, the panel analyzed results from patients for whom a sentinel node biopsy was available. "Up until the mid-90s, the sentinel node procedure wasn't considered to be standard, so some people in the previous dataset had the procedure and some did not," said Michael E. Ming, MD, FAAD, associate professor of dermatology at the Hospital of the University of Pennsylvania. "In the newer dataset, a lot more people would have had it." Dr. Ming added that the members of the panel for AJCC 8 are different from the group that produced AJCC 7, which may underlie some of the changes in the newer edition.

A group of authors representing the AJCC Melanoma Expert Panel and the International Melanoma Database and Discovery Platform published a detailed discussion of the updates to the melanoma staging criteria in AJCC 8 (CA Cancer J Clin. 2017;76:472-92). Among the numerous changes to and clarifications of criteria set forth in AJCC 7, the authors highlight the following:

  • Tumor thickness measurements are now recorded to the nearest 0.1 mm, not 0.01 mm.

  • Tumor mitotic rate is removed as a staging criterion for T1 tumors. T1a melanomas are now defined as nonulcerated and <0.8 mm in thickness; T1b is now defined as melanomas 0.8-1.0 mm in thickness regardless of ulceration status OR ulcerated melanomas <0.8 mm in thickness.

  • Pathological (but not clinical) stage IA is revised to include T1b N0 M0 (formerly pathologic stage IB).

  • The N category descriptors "microscopic" and "macroscopic" for regional node metastasis are redefined as "clinically occult" and "clinically apparent."

  • Prognostic stage III groupings are based on N category criteria and T category criteria (i.e., primary tumor thickness and ulceration) and increase from three to four subgroups (stages IIIA-IIID).

  • Definitions of N subcategories are revised, with the presence of microsatellites, satellites, or in-transit metastases now categorized as N1c, N2c, or N3c based on the number of tumor-involved regional lymph nodes, if any.

  • Descriptors are added to each M1 subcategory designation for lactate dehydrogenase (LDH) level (LDH elevation no longer upstages to M1c).

  • A new M1d designation is added for central nervous system metastases.

In Dr. Ming's view, the changes in staging criteria for patients with Stage I and Stage II melanoma will likely have the most significance for dermatologists, as "those are the patients for whom we as dermatologists are most likely to be taking primary responsibility." Specifically, Dr. Ming pointed to the changes from AJCC 7 to AJCC 8 affecting T1 tumors as particularly noteworthy. "In the previous system, if you had a lesion that was 1 mm or less in thickness and the lesion had a mitosis or ulceration, you moved from T1a to T1b. Now, if you have a lesion with a thickness between 0.8 mm and 1 mm or if the lesion has ulceration, you move from T1a to T1b. If you have a lesion that's less than 0.8 mm, then it will be T1a if it's not ulcerated, but T1b if it is ulcerated." 

In addition, "mitotic rate is not in the staging system at all at this point, although it's still important," said Dr. Ming. "The committee members did say that it should still be reported, but it was thought that the 0.8 mm thickness cutoff was a better reflection of survival than the mitotic rate, if only one of them were to be included." A colleague of Dr. Ming's, Emily Y. Chu, MD, PhD, FAAD, agreed that the changes to T1a and T1b are the most impactful and "maybe the most confusing. The biggest change on our part as dermatopathologists is the lack of inclusion of mitoses in distinguishing between the T1a vs. the T1b melanomas." Dr. Chu, who is associate professor of dermatology at the Hospital of the University of Pennsylvania, maintained that "it is still recommended that the mitotic rate be included in pathology reports, even though this is no longer part of the staging system. In a number of ways, the change does make some sense because the survival difference between a thin melanoma with 0 versus 1 mitosis/mm₂ may not be great, but the question may be: Do we need to stratify between one and two? In practice, if a patient has a thinner melanoma, less than 0.8 mm in depth, but they have three or four mitotic figures, that's a melanoma I'm going to worry a lot more about than if they have one mitotic figure per mm₂."

Another significant change for dermatopathologists, Dr. Chu noted, is "the issue of microsatellites and how those are reported. It used to be that microsatellites were defined as tumor deposits that are separated from the primary melanoma by a distance of at least 0.3 mm and with a diameter of at least 0.05 mm, and now the size and distance criteria are no longer included. Now, because the distance and size thresholds have been removed, you could see more calls of microsatellites than in the past, which would then prompt some melanomas to be staged upward compared to in the prior editions." Dr. Ming explained that while Stage III wasn't expanded in AJCC 8, "they moved people around within Stage III. The possible staging options for patients with microscopic satellites or in-transit metastases are much wider than they had previously been. Research has shown that the thickness of the original lesion and the number of involved nodes influence survival for these patients, so that information is included in more detail now." 

Cutaneous squamous cell carcinoma

Although cSCC is the second most common cancer among the white population in the U.S., the majority of patients are at very low risk of recurrence once the primary tumor has been removed. But in large part because it is so common, staging cSCC in a way that helps dermatologists target the small proportion of cases at high risk of a poor outcome has posed a serious challenge, said Chrysalyne D. Schmults, MD, FAAD, associate professor and vice chair of surgical oncology, department of dermatology, at Harvard Medical School. "The problem with squamous cell staging is that we don't have large-scale data to validate it. SEER seeks to record every melanoma case, for example, that's seen at the SEER contributing centers, and that's not feasible with a disease like squamous cell because there are just too many. It was considered too much manpower for a disease that was thought to not kill very many people."

Dr. Schmults said she developed a special interest in staging cSCC while at the University of Pennsylvania, "where I was seeing patients with large tumors, who I was really worried about having risk of metastasis and death. But without good staging, you can't really start to develop guidelines on, say, which people need radiologic nodal staging, which people need adjuvant therapy in addition to surgery. That's overkill for most patients with squamous cell cancer, but you're not sure how to define that group of patients who do have a risk of things going badly." Dr. Schmults developed a cohort of cSCC patients for study at Penn, then moved to Brigham and Women's Hospital (BWH) and started a similar cohort there. Using data from both cohorts, her group sought to validate AJCC staging. "What we found was that it was performing quite poorly in the 7th edition because they had taken a lot of staging parameters from head and neck mucosal squamous cell cancers, but those are quite different," she explained. "The biggest problem with AJCC 7 was that to get into the upper stages, T3 and T4 tumors, you had to have bone invasion, and most of our bad squamous cell cancers don't have that. What our data showed was that almost all the poor outcomes were happening in T2 tumors. So, you had this big, heterogenous T2 group that included a lot of people who were very likely to do well, and almost all the people who did do poorly."

"The problem with squamous cell staging is that we don't have large-scale data to validate it."

A subset of the BWH cohort — those with cSCC of the head and neck — were analyzed for a comparison of AJCC 7 and AJCC 8 (JAMA Dermatol. 2018;154(2):175-181). Shortcomings of the AJCC 7 classification, the authors state, were that it "lacked distinctiveness (outcomes differ between categories), homogeneity (outcomes are similar within categories), and monotonicity (outcomes worsen with increasing categories), which are three categories set forth by the AJCC to describe an ideal staging system." Significant changes in AJCC 8 cited in the article include:

  • T2 is now restricted to tumors that are 2 cm or larger but less than 4 cm in greatest dimension without any risk factors.

  • T3 has been expanded to include tumors that are 4 cm or larger in greatest dimension or have one or more risk factors: deep invasion, defined as invasion beyond the subcutaneous fat or >6 mm; perineural invasion; and minor bone invasion.

"In AJCC 8, the big changes were that the depth of invasion considered to be significant was changed to be deeper, and the perineural invasion was classified as large caliber," said Emily S. Ruiz, MD, FAAD, director of the High-Risk Skin Cancer Clinic at Dana-Farber/Brigham and Women's Cancer Center and assistant professor of dermatology at Harvard Medical School. "Also, it now uses a 2- and 4-cm cutoff to distinguish between T2 and T3. The 7th edition is quite outdated now." At first, the AJCC committee tasked with developing the 8th edition planned to omit an update of cSCC staging, Dr. Ruiz said, "but the head and neck surgeons said they needed a staging system, so they took it into their section. That's why the staging system is written for head and neck tumors, but it will be extrapolated to the trunk."

AJCC 8, while an improvement over the previous version, still has shortcomings, Dr. Schmults maintained. "They expanded T3 a lot, which helped because it moved a lot of the poor outcomes out of T2 and up into T3. But now the problem is that the T2 and T3 groups have about equal risks. And if you group all the tumors that are AJCC T2 and T3 together, it's about 25% of all squamous cell cancers that are being called high-risk — and that's too big a group. You're inappropriately upstaging too many people who are really low risk." 

While AJCC 7 was still in effect, Dr. Schmults had spearheaded the development of a new staging system that would "basically break this large T2 group into a high-risk and a low-risk group." Using modeling to isolate risk factors that were the most useful in predicting metastasis and death, Dr. Schmults targeted four with which to build the BWH tumor classification system: a pre-operative tumor diameter of 2 cm or more; depth of invasion beyond the subcutaneous fat; poor differentiation; and perineural invasion of a nerve that is 0.1 mm or larger in caliber. "If you have none of those risk factors, in Brigham staging you're T1," Dr. Schmults explained. "If you have just one of them, you're T2a, if you have two or three of them then you're T2b, and if you have all four of them, or if you have bone invasion, then you're T3."  Using the BWH staging system, "we're able to capture the same number of poor outcomes, but in a smaller fraction of patients, about half the percentage of AJCC 8. It's about 10% or so of cSCC patients that are T2b or T3 in Brigham staging, and that's where all the poor outcomes are pretty much happening." A study comparing the performance of the AJCC 8 and BWH staging systems in head and neck cSCC only (JAMA Dermatol. 2019;155(7):819-825) concluded that "use of BWH tumor classification may minimize the number of patients recommended for radiologic evaluation, close surveillance, and possible adjuvant therapy while still identifying most patients at risk for recurrence, metastasis and death."

Assessing implications for treatment resulting from the new staging system, Dr. Schmults remarked that, "Dr. Emily Ruiz has put out a couple of papers showing that if you do radiologic imaging to stage the lymph nodes initially, and do surveillance for tumor recurrence for T2b and T3 people, that seems to be associated with better outcomes. So that's one practical thing that we're advocating for." In terms of adjuvant treatment, however, "that remains an open question. Staging hasn't helped us with that because the risk of you having a poor outcome, if you are one of these upper stage people, varies depending on which study you look at." Citing a risk ranging from 10-20% in various studies, Dr. Schmults noted that "a 10% risk isn't high enough for a lot of patients, especially elderly, frail patients, to want to go through, say, a course of adjuvant radiation after surgery."

Why staging matters

For patients with melanoma, staging is a critical first step in planning how to manage the disease, said Dr. Ming. "It helps us stratify people according to their survival risk profile, so people in the same stage, in general, have similar survival. In turn, that helps us understand who should get certain kinds of management. It's probably not cost effective or sensible from a risk-benefit perspective to look for a positive sentinel node in someone who has an extremely low likelihood of having a positive node, but for other people, it's probably worthwhile to do. It also helps in terms of clinical trials, because a lot of times those are done in different centers under different scenarios, but if everyone in the trials is in the same stage, then it's easier to compare the trials to each other." Dr. Chu agreed, noting that "the staging system gives us a common language in terms of thinking about these tumors, and they use parameters that most providers and institutions are going to be able to understand." Both Dr. Chu and Dr. Ming said they believe many dermatologists are taking the step of staging their patients' melanoma. "I think people are probably either sending the patient to someone like myself or Emily [Dr. Chu], who has particular expertise in melanoma, or they would do it themselves," said Dr. Ming. "Because melanoma is potentially life-threatening, and you need to consider who might have more of a problem."

"The crucial advantage to staging is identifying tumors that are high stage and then offering them closer surveillance and, in some tumors, adjuvant therapy."

For dermatologists treating cSCC, "the crucial advantage to staging is identifying tumors that are high stage and then offering them closer surveillance and, in some tumors, adjuvant therapy," said Dr. Ruiz. "One big change in the new NCCN is that they're recommending Mohs surgery for high stage squamous cells, so that's one reason it's important to recognize the high stage tumors." As to whether dermatologists are routinely staging cSCC, Dr. Ruiz said, "I think it's variable. I think there are some who do and a lot who don't. There are a lot of squamous cell carcinomas, and some people just don't see as many aggressive ones and so they're not in the routine of staging them. And then there are few clear guidelines on what to do with high-stage tumors." More dermatologists are staging cSCC "when they know a tumor is bad," said Dr. Schmults. "We've talked a lot at meetings about what constitutes high-risk or high-stage squamous cell. So, I think people have a good handle on what the risk factors are, and when they get a tumor with one or more of those risk factors, increasingly people are starting to formally stage them and use that to try to figure out what to do for a patient."


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Tamizaje con algunos biologicos

Sylvia Hsu, MD, FAAD

The MEDLINE database was searched to identify data on risks associated with adalimumab, etanercept, infliximab, and ustekinumab. Articles were reviewed and graded according to methods developed by the U.S. Preventative Services Task Force (J Am Acad Dermatol. 2015;73(3):420-8.e1).

The highest evidence grade for screening studies was B, seen in the use of tuberculin skin testing (TST) and interferon-gamma release assay (IGRA). Based on the USPSTF grading system, it is recommended this screen be provided because there is high certainty that the net benefit is moderate, or medium certainty that the net benefit is moderate to substantial. IGRA is preferred over TST because of IGRA's higher sensitivity and specificity.

Although HBV screening with triple serology — hepatitis surface antigen (HBsAg), hepatitis surface antibody (HBsAb), and hepatitis core antibody (HBcAb) — is recommended, this is supported by only grade C evidence. The evidence supporting HCV screening is also grade C, indicating that there is moderate certainty that the net benefit of routine screening for HBV and HCV is small. Therefore, screening for HBV or HCV can be performed based on professional judgment and/or prior authorization requirement. There is also insufficient evidence to recommend these routine screening tests: HIV, ANA, CBC, LFTs, skin cancer screening, renal studies, pregnancy testing, dsDNA, CRP.

Baseline tuberculosis testing is the only screening test with strong evidence to support its practice. Other screening and monitoring tests that are often performed in patients who are taking biologic agents lack evidence to support their use.


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Benjamin Hidalgo-Matlock
Skin Care Physicians of Costa Rica

Clinica Victoria en San Pedro: 4000-1054
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Acne y recaida

What's hot

October 1, 2021

In this monthly column, members of the DermWorld Editorial Advisory Workgroup identify exciting news from across the specialty.  

Mallory Abate, MD, FAAD

We all know how frustrating it can be when a patient's acne returns after isotretinoin, requiring them to undergo a second course. A better understanding of why this occurs could be very beneficial for prescribers. So, what are the risk factors for acne relapse in patients who then undergo a second course of isotretinoin? Prior studies have identified factors such as cumulative dose, male sex, younger age, and severity and treatment duration to be associated with acne recurrence. A more recent retrospective review published in JAAD (2021. Mar; 84(3): 856-9) found two main risk factors. Compared with control patients who only had to undergo one course of isotretinoin, patients who relapsed were more likely to have received a lower cumulative dose (128.1 vs. 159mg/kg p< .005) and to have a shorter duration of treatment continuation after acne clearance (32 vs. 65.4 days p< .005). The authors note that the latter finding of extending the isotretinoin treatment well beyond the clearance date is a relatively new concept. These results support that extending isotretinoin treatment at least two months beyond acne clearance is important to prevent relapse


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Skin Care Physicians of Costa Rica

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Monday, December 13, 2021

Comorbidities of Atopic Dermatitis in Adults

Journal Scan / Research · December 12, 2021

Journal of the American Academy of Dermatology

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abstract

This abstract is available on the publisher's site.

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Additional Info

Journal of the American Academy of Dermatology
Real-world comorbidities of atopic dermatitis in the U.S. adult ambulatory population
J Am Acad Dermatol 2021 Nov 17;[EPub Ahead of Print], YS Roh, AH Huang, N Sutaria, U Choi, S Wongvibulsin, J Choi, ZA Bordeaux, V Parthasarathy, J Deng, DP Patel, JK Canner, AL Grossberg, SG Kwatra

Patient-Led Surveillance After Treatment of Localized Melanoma

Journal Scan / Research · December 08, 2021

JAMA Dermatology

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abstract

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Additional Info

JAMA Dermatology
Assessing the Potential for Patient-led Surveillance After Treatment of Localized Melanoma (MEL-SELF): A Pilot Randomized Clinical Trial
JAMA Dermatol 2021 Nov 24;[EPub Ahead of Print], DM Ackermann, M Dieng, E Medcalf, MC Jenkins, CH van Kemenade, M Janda, RM Turner, AE Cust, RL Morton, L Irwig, P Guitera, HP Soyer, V Mar, JK Hersch, D Low, C Low, RPM Saw, RA Scolyer, D Drabarek, D Espinoza, A Azzi, AM Lilleyman, AK Smit, P Murchie, JF Thompson, KJL Bell

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Wednesday, December 01, 2021

Vexas Syndrome and Mielodisplasia Cutis

THE NEXUS OF VEXAS SYNDROME


DII small banner

By Warren R. Heymann, MD, FAAD
December 1, 2021
Vol. 3, No. 47

You may not be familiar with VEXAS (Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic) syndrome, but it is conceivable that you have already unknowingly encountered patients with the disorder. 

To appreciate the clinical nuances of the VEXAS syndrome, it is imperative to understand the concept of ubiquitination. As previously discussed in the DermWorld Insights and Inquiries commentary "Ubiquitous Ubiquitination" ubiquitination regulates the function and signaling of a profusion of proteins in various cellular pathways. (1) Ubiquitination serves as a degradation mechanism of proteins as part of the ubiquitin-proteasome pathway but is also involved in additional cellular processes such as activation of the NFκB inflammatory response and DNA damage repair. Ubiquitin is a highly conserved 76-amino acid protein expressed in all cell types that can be polymerized into various linkages. Ubiquitination is a conserved multistep process that begins with the activation of ubiquitin with ATP by the E1 ubiquitin-activating enzyme. Ultimately, deubiquitinating enzymes remove ubiquitin from target substrates and recycle ubiquitin into the cytosolic pool. (2)

It has been long known that certain disorders, such as Sweet syndrome (SS) and relapsing polychondritis (RP), are associated with lymphoproliferative malignancies. 

Illustration for DWII on Vexas
Image from reference 7.

Beck et al used a genotype-driven approach to identify a disorder connecting seemingly unrelated adult-onset inflammatory syndromes, naming disorder the VEXAS. The authors identified 25 men with somatic mutations affecting methionine-41 (p.Met41) in UBA1, the major E1 enzyme that initiates ubiquitylation. (The gene UBA1 lies on the X chromosome.) These patients manifest an often fatal, treatment-refractory inflammatory syndrome that develops in late adulthood, with fevers, cytopenias, characteristic vacuoles in myeloid and erythroid precursor cells, dysplastic bone marrow, neutrophilic cutaneous and pulmonary inflammation, chondritis, and vasculitis. Most of these 25 patients met clinical criteria for an inflammatory syndrome (relapsing polychondritis, Sweet syndrome, polyarteritis nodosa, or giant-cell arteritis) or a hematologic condition (myelodysplastic syndrome or multiple myeloma) or both. Mutations were found in more than half the hematopoietic stem cells, including peripheral-blood myeloid cells but not lymphocytes or fibroblasts. Mutant peripheral-blood cells showed decreased ubiquitylation and activated innate immune pathways responsible for the clinical phenotype. (3)

Koster et al identified 9 men with VEXAS syndrome by finding somatic mutations in the UBA1 gene; the most frequent variant was p.Met41Thr. The median age was 74 years, and patients had a median duration of symptoms for 4 years prior to the diagnosis. Refractory constitutional symptoms (88%), ear and nose chondritis (55%), and inflammatory arthritis (55%) were common clinical features. Vasculitis was noted in 44%. All patients had significantly elevated inflammatory markers and macrocytic anemia. Thrombocytopenia was present in 66%. Eight patients had bone marrow biopsies performed. All bone marrows were hypercellular, and there was vacuolization of the erythroid (100%) or myeloid precursors (75%). Glucocorticoids improved symptoms (prednisone doses ≥20 mg per day), however other immunosuppressive agents did not provide consistent long-term control of the syndrome. The authors confirmed that VEXAS syndrome is a clinically heterogeneous, treatment-refractory inflammatory condition caused by somatic mutation of the UBA1 gene. Patients often present with overlapping rheumatologic manifestations and persistent hematologic abnormalities. (4) Sharma et al reported a case of VEXAS syndrome in a 70-year-old man with systemic lupus erythematosus. (5)

Illustration for DWII on Vexas
Image from reference 7.

Zakine et al focused on the dermatological manifestations of VEXAS syndrome, identifying 8 men whose median age at symptom onset was 65.5 years. All patients had neutrophilic dermatosis skin lesions, including tender red or violaceous papules, sometimes edematous, inflammatory edematous papules on the neck and trunk (sometimes umbilicated), and firm erythematous purpuric or pigmented infiltrated plaques and nodules. Three patients had livedo racemosa. Three of 8 displayed fever and arthralgia, while 3 other patients had associated RP. Histologically, the infiltrates consisted of mature neutrophils with leukocytoclasia, which were admixed with myeloperoxidase-positive CD163-positive myeloid cells with indented nuclei and lymphoid cells in all cases. A sequencing analysis of paired bone marrow samples and skin lesion biopsies identified the same loss-of-function UBA1 variation in both samples for all patients, suggesting that the dermal infiltrates seen in VEXAS skin lesions are derived from the pathological myeloid clone. (6)

VEXAS syndrome may prove fatal in up to 40% of cases due to progressive anemia, respiratory failure, or complications of therapy. (3) Systemic steroids are the only effective therapy to date. Potential treatment modalities may include bone marrow transplantation or gene therapy. (7)

It will be fascinating to determine how many inflammatory disorders associated with myelodysplastic disease are due to UBA1 mutations. Ferrada et al performed exome and targeted sequencing of UBA1in a prospective observational cohort of patients with RP. Seven of 92 patients with RP (7.6%) had UBA1 mutations. The mortality was significantly greater in those designated as VEXAS-RP than in RP alone (23% versus 4%; P = 0.029). (8) I anticipate that similar studies will be performed with other disorders such as Sweet syndrome. 

The famous postcard line "The sun has riz, the sun has set, and here we is in Texas yet" refers to the enormity of the state. Dermatologists are now entering the vast state of VEXAS and need to learn its geography. 

Point to Remember: Think of VEXAS syndrome when seeing elderly men with neutrophilic dermatoses in combination with myelodysplasia and relapsing polychondritis. It is a prime example of how exome analysis can explain the co-occurrence of previously disparate disorders. 

Our expert's viewpoint

Jean-David Bouaziz and Marie-Dominique Vignon-Pennamen, Saint Louis Hospital and Paris University, Paris, France

Neutrophilic dermatosis associated with VEXAS syndrome: When myeloid malignancy links with clonal autoinflammation

Sweet's syndrome (SS) was historically described as an acute disease with skin lesions, fever, and arthralgia. (9) Apart from this classical form, SS-like lesions occurring in elderly had sometimes a more chronic course and were strongly associated with myelodysplastic syndrome (MDS). (10) In this MDS-associated SS-like cutaneous disease, the bone marrow clonal origin of myeloid cells infiltrating the skin was clearly demonstrated by our group as evidenced by cytological (10), cytogenetic (same cytogenetic abnormalities in the skin and in the bone marrow) (11), and genomic studies (same oncogenic mutation in the skin and in the blood marrow). (12) To describe SS-like cutaneous disease in the setting of MDS, that does not result from germinal inborn errors in inflammasome pathways such as described in monogenic and polygenic disorders (for example pyoderma gangrenosum in Crohn's disease), the term Myelodysplasia Cutis was coined by us because of the bone marrow clonal origin of the immature myeloid cells in the skin. (13) In VEXAS syndrome, myeloid cells that infiltrate the skin have not only a clonal bone marrow origin (6) but also an activation of their inflammatory loops involving the ubiquitin pathway. Two questions remain: 1) it remains to be proved if the clonal infiltration of UBA1 myeloid cells in the skin of VEXAS syndrome could also be seen in the cartilage, the lung, and other inflamed organs; 2) in a recent series of patients with MDS associated inflammatory disorders the frequency of UBA1 mutation was 5% (4/85 patients) (14), suggesting that other oncogenic drivers may induce SS like Myelodysplasia Cutis skin lesions.

  1. https://www.aad.org/dw/dw-insights-and-inquiries/dermatopathology/ubiquitous-ubiquitination

  2. Gallo LH, Ko J, Donoghue DJ. The importance of regulatory ubiquitination in cancer and metastasis. Cell Cycle. 2017 Apr 3;16(7):634-648. doi: 10.1080/15384101.2017.1288326. Epub 2017 Feb 6. PMID: 28166483; PMCID: PMC5397262.

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  12. Passet M, Lepelletier C, Vignon-Pennamen MD, Chasset F, Hirsch P, Battistella M, Duriez P, Sicre de Fontbrune F, Boissel N, Legrand O, Raffoux E, Bagot M, Adès L, Clappier E, Bouaziz JD. Next-Generation Sequencing in Myeloid Neoplasm-Associated Sweet's Syndrome Demonstrates Clonal Relation between Malignant Cells and Skin-Infiltrating Neutrophils. J Invest Dermatol. 2020 Sep;140(9):1873-1876.e5. doi: 10.1016/j.jid.2019.12.040. Epub 2020 Feb 17. PMID: 32081610.

  13. Delaleu J, Battistella M, Rathana K, Vignon-Pennamen MD, Laurent C, Ram-Wolff C, Fenaux P, Jachiet M, Zuelgaray E, Bagot M, Bouaziz JD, de Masson A. Identification of clonal skin myeloid cells by next-generation sequencing in myelodysplasia cutis. Br J Dermatol. 2021 Feb;184(2):367-369. doi: 10.1111/bjd.19547. Epub 2020 Dec 16. PMID: 32964412.

  14. Zhao LP, Schell B, Sébert M, Kim R, Lemaire P, Boy M, Mathis S, Larcher L, Chauvel C, Dhouaieb MB, Bisio V, Preudhomme C, Marceau-Renaut A, Itzykson R, Mekinian A, Fain O, Toubert A, Fenaux P, Dulphy N, Clappier E, Adès L. Prevalence of UBA1 mutations in MDS/CMML patients with systemic inflammatory and auto-immune disease. Leukemia. 2021 Sep;35(9):2731-2733. doi: 10.1038/s41375-021-01353-8. Epub 2021 Aug 3. PMID: 34344988.



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