Cutaneous reactions after SARS-CoV-2 vaccination: a cross-sectional Spanish nationwide study of 405 cases.

BACKGROUND: Cutaneous reactions after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines are poorly characterized. OBJECTIVE: To describe and classify cutaneous reactions after SARS-CoV-2 vaccination. METHODS: A nationwide Spanish cross-sectional study was conducted. We included patients with cutaneous reactions within 21 days of any dose of the approved vaccines at the time of the study. After a face-to-face visit with a dermatologist, information on cutaneous reactions was collected via an online professional survey and clinical photographs were sent by email. Investigators searched for consensus on clinical patterns and classification. RESULTS: From 16 February to 15 May 2021, we collected 405 reactions after vaccination with the BNT162b2 (Pfizer-BioNTech; 40·2%), mRNA-1273 (Moderna; 36·3%) and AZD1222 (AstraZeneca; 23·5%) vaccines. Mean patient age was 50·7 years and 80·2% were female. Cutaneous reactions were classified as injection site ('COVID arm', 32·1%), urticaria (14·6%), morbilliform (8·9%), papulovesicular (6·4%), pityriasis rosea-like (4·9%) and purpuric (4%) reactions. Varicella zoster and herpes simplex virus reactivations accounted for 13·8% of reactions. The COVID arm was almost exclusive to women (95·4%). The most reported reactions in each vaccine group were COVID arm (mRNA-1273, Moderna, 61·9%), varicella zoster virus reactivation (BNT162b2, Pfizer-BioNTech, 17·2%) and urticaria (AZD1222, AstraZeneca, 21·1%). Most reactions to the mRNA-1273 (Moderna) vaccine were described in women (90·5%). Eighty reactions (21%) were classified as severe/very severe and 81% required treatment. CONCLUSIONS: Cutaneous reactions after SARS-CoV-2 vaccination are heterogeneous. Most are mild-to-moderate and self-limiting, although severe/very severe reactions are reported. Knowledge of these reactions during mass vaccination may help healthcare professionals and reassure patients.

Arthroderma benhamiae, un dermatofito causante de una tiña emergente / Arthroderma benhamiae, An Emerging Dermatophyte Cause of Tinea

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Microsporum audouinii: un dermatofito causante de una tiña reemergente / Microsporum audouinii: Re-Emergence of Ringworm Due to the Dermatophyte

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Rosettes in actinic keratosis and squamous cell carcinoma: distribution, association to other dermoscopic signs and description of the rosette pattern.

BACKGROUND: Rosettes, a dermoscopic structure characterized by four white points arranged as a 4-leaf clover, supports the dermoscopic diagnosis of actinic keratosis (AK) or squamous cell carcinoma (SCC). OBJECTIVE: The association of rosettes with other dermoscopic structures in AK or SCC and their distribution has not been analysed yet. METHODS: We conducted a prospective study of patients with histologically proven AK or SCC who presented dermoscopic rosettes at initial evaluation. RESULTS: A total of 56 tumours were collected (94.6% AK and 5.4% SCC). Thirty-seven (66.1%) lesions were non-pigmented and 19 (33.9%) pigmented. The most common dermoscopic findings were erythema (53; 94.6%) and scale (42; 75%). White circles were present in 21 lesions (37.5%); pigmented pseudonetwork in 18 (32.1%) and multiple grey to brown dots and globules in 14 (25%). Rosettes were distributed focally in 9 (16.1%) and generalized in 47 (83.9%). The rosette pattern (rosettes as the main structure) was observed only in AK (19; 35.8%). LIMITATIONS: The analysis was not blinded. The distinction between focal distribution (up to 3 rosettes) or generalized could be considered arbitrary. CONCLUSION: The rosette pattern identified in AK may be a specific pattern for AK.

Lúnulas rojas en alopecia areata / Red lunulae in alopecia areata

Las lúnulas rojas pueden observarse de forma excepcional en la alopecia areata. Describimos el caso de una mujer de 23 años con alopecia areata en placas multifocal de un año de evolución que evoluciona a una alopecia areata total. Pocas semanas después, se pueden apreciar lúnulas rojas en todos los dedos de las manos y en el primer dedo de ambos pies. La patogénesis de las lúnulas rojas es incierta. Suelen desarrollarse poco después de la fase aguda y desaparecen lentamente dejando, en algunos casos, líneas de Beau (AU)

Red lunulae have been observed excepcionally in alopecia areata. We describe a 23-year-old girl with a multifocal alopecia areata of one year evolution which progress to a totalis. Few weeks later, we can observe red lunulae in all fingernails and both great to enails. Pathogenesis of red lunulae is uncertain. They usually appear shortly after the acute on set of hair loss and disappear slowly leaving, in some cases, Beau´s lines(AU)

Reacciones al color rojo de los tatuajes / Red tatoo reactions

Presentamos cinco pacientes (tres mujeres y dos varones) que consultaron por reacciones al color rojo de los tatuajes. Todos ellos referían prurito y elevación de las zonas coloreadas en rojo que había comenzado entre varios días y 4 años después de la realización de los mismos. Se tomaron biopsias de las lesiones, que mostraron un patrón liquenoide en tres de ellos, una dermatitis espongiótica en otro y una hiperplasia pseudoepiteliomatosa en el último. A tres se les realizaron pruebas epicutáneas, encontrándose únicamente una positividad a la tinta aportada por uno de ellos, sin otras positividades en la batería estándar y de colorantes textiles. Venticinco controles con dicha tinta fueron negativos. Nuestros casos concuerdan con la literatura, en la que se describen distintas reacciones al color rojo de los tatuajes, todas ellas con una clínica muy similar, siendo el patrón histológico variable, en la mayoría de los casos de tipo liquenoide. Las pruebas epicutáneas tienen muy baja sensibilidad y no se ha podido establecer una relación causal con ningún elemento químico (AU)

Dermatofibroma aneurismático o hemorrágico / Aneurysmal or hemorrhagic dermatofibroma

El Dermatofibroma aneurismático es una rara variante de dermatofibroma pero con características histopatológicas distintivas. En el seno de la lesión se advierten hendiduras y espacios vasculares (sin revestimiento endotelial), llenos de material hemático y acompañados de abundantes depósitos de hemosiderina, que resultan de la extravasación de sangre dentro del estroma tumoral. Este aspecto histopatológico hace discutible el término aneurismático como adjetivo más correcto o no para definir este tipo de dermatofibroma.Presentamos el caso de una lesión en una joven de 14 años cuyo diagnóstico inicial fue de lesión angiomatosa, y describimos las características clinicopatológicas del tumor, así como el diagnóstico diferencial, fundamentalmente con lesiones de estirpe vascular. asimismo discutimos los diferentes términos propuestos por los autores para definir este cuadro (AU)