COVID-19 infection and vaccination in 92 pediatric patients with cutaneous mastocytosis: A retrospective, cross-sectional study.

Mast cells (MCs) can release a variety of biologically active mediators under different circumstances, such as fever or vaccination. Our aim was to evaluate the incidence and severity of MC activation symptoms induced by SARS-CoV-2 virus (COVID-19) infection and vaccination in a cohort of 92 pediatric patients with cutaneous mastocytosis. Our findings support previous evidence on the safety of COVID-19 infection and vaccination in patients with MC disorders.

Mujer de 60 años con problemas de visión y lesiones cutáneas / A 60-year-old woman with visual impairment and cutaneous lesions

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Acral papular mucinosis: a new case of this rare entity

Abstract Acral persistent papular mucinosis (APPM) is a rare subtype of localized lichen myxedematosus. It consists of small papules localized exclusively on the back of the hands, wrists and extensor aspects of distal forearms with no other clinical or laboratory manifestations. The lesions tend to persist and may increase slowly in number. Histologically, hematoxylin-eosin and Alcian blue staining demonstrate mucin accumulation in the upper reticular dermis with separation of collagen fibers as a result of hyaluronic acid deposition. Treatment is rarely necessary due to the absence of symptoms. We present a 27-year-old healthy woman with asymptomatic papules on her upper extremities, which adequately meet clinical and pathological criteria of acral papular mucinosis.

Acral papular mucinosis: a new case of this rare entity.

Acral persistent papular mucinosis (APPM) is a rare subtype of localized lichen myxedematosus. It consists of small papules localized exclusively on the back of the hands, wrists and extensor aspects of distal forearms with no other clinical or laboratory manifestations. The lesions tend to persist and may increase slowly in number. Histologically, hematoxylin-eosin and Alcian blue staining demonstrate mucin accumulation in the upper reticular dermis with separation of collagen fibers as a result of hyaluronic acid deposition. Treatment is rarely necessary due to the absence of symptoms. We present a 27-year-old healthy woman with asymptomatic papules on her upper extremities, which adequately meet clinical and pathological criteria of acral papular mucinosis.

Varón de 65 años con múltiples malformaciones vasculares cutaneomucosas / Skin and mucous vascular malformations in a 65 years old man

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Carcinoma de células de Merkel. A propósito de un caso / Merkel cell carcinoma. A case report

El Carcinoma de Células de Merkel (CCM) es un tumor inusual de rápido crecimiento y potencial metastático, que presenta una mortalidad elevada (30%) y cuya incidencia está en aumento. Principalmente afecta a las personas de avanzada edad, inmunodeprimidos e historia de fotoexposición prolongada. En el 2008 se estableció su asociación con el Poliomavirus de las células de Merkel (MCPyV) lo que ha supuesto un nuevo campo de investigación. Su manejo está en continua discusión ya que la mayoría de las guías se basan en estudios restrospectivos. Presentamos un caso de CCM en mejilla derecha, en una paciente de 85 años. Esta revisión pretende actualizar los conocimientos de este tumor poco frecuente pero muy agresivo (AU)

The Merkel cell carcinoma (MCC) is an unusual, rapidly growing tumour and potentially metastatic, presenting a high mortality rate (30%), and whose incidence is increasing. It mainly affects people of advanced age, immunodepressed, and with a history of prolonged exposure to the sun. In 2008, an association with Merkel cell polyomavirus (MCPyV) was established, which has led to a new field of research. Its management is under continuous discussion, as most guidelines are based on retrospective studies. We report a case of MCC on the right cheek, in an 85 year old patient. The aim of this report is to update knowledge of this uncommon but very aggressive tumour (AU)

Herpes Zoster diseminado / Disseminated Herpes Zoster

El herpes zoster es el resultado de la reactivación del virus varicela-zoster dentro del ganglio sensitivo, en el cual ha permanecido latente desde la primoinfección, produciendo una erupción característica. La complicación aguda más frecuente es la neuralgia postherpética y la más grave es la diseminación del herpes zoster, con compromiso sistémico. El objetivo del tratamiento antivírico precoz es evitar la aparición de complicaciones (AU)

Herpes zoster infection produces a characteristic eruption, and is the result of reactivation of herpes varicella-zoster virus within the sensory ganglia, where the virus can remain latent since the initial infection. The most common acute complication is postherpetic neuralgia, but the most serious complication is dissemination of the infection which can compromise overall health and organ function. The goal of early anti-viral treatment is to prevent these complications (AU)

Mononucleosis infecciosa / Infectious mononucleosis

La mononucleosis infecciosa debe sospecharse en pacientes que cursan un cuadro pseudogripal que evoluciona a una faringoamigdalitis inespecífica y aparición de lesiones cutáneas, que frecuentemente se confunde con una infección bacteriana. Su expresión en la piel da lugar a dos tipos de exantemas. El primero, de aparición temprana, polimorfo y que resuelve en pocos días y otro, llamado sinérgico, relacionado con la administración de antibióticos. Presentamos el caso de una paciente con mononucleosis infecciosa que desarrolló un exantema de tipo sinérgico.

Infectious mononucleosis should be suspected in patients who have flu-like symptoms which progress to nonspecific pharyngitis and skin lesions. It is usually confused with a bacterial infection. Expression in the skin gives rise to two types of exanthemas. The first one, early-onset, polymorphous and early-resolution. The other one, also called synergic, related to antibiotics. We report a case of a patient with an infectious mononucleosis and a synergic exanthema.

Dolor torácico y ascenso del ST en cara anterior / Chest pain and ST elevation in anterior leads

Presentamos el caso de una mujer de 79 años que ingresa en el servicio de Cardiología tras acudir a Urgencias con síntomas sugerentes de un síndrome coronario agudo, llegando a un diagnóstico cada vez más frecuente y quizá infradiagnosticado años atrás. El Síndrome de Takotsubo es una entidad clínica predominante en mujeres postmenopáusicas y se presenta típicamente tras un estrés físico o psíquico intenso. El cuadro clínico remeda el de un síndrome coronario agudo, sin embargo es característica la ausencia de lesiones angiográficas coronarias y un patrón ecocardiográfico de "balonización" del ventrículo izquierdo por hipercontractilidad de los segmentos basales y discinesia apical. Estas alteraciones suelen recuperarse completamente en el transcurso de unas semanas. Exponemos además una pequeña revisión sobre el estado actual del diagnóstico y tratamiento (AU)

We report a case of a 79 year old woman admitted to our Cardiology department for symptoms suggestive of acute coronary syndrome, eventually reaching an increasingly common diagnosis of a syndrome that was perhaps under-diagnosed in previous years. Takotsubo syndrome is a clinical entity predominantly occurring in postmenopausal women typically after severe physical or psychological stress. The symptoms mimic an acute coronary syndrome, however the absence of coronary angiographic lesions and an echocardiographic pattern of "apical ballooning" in the left ventricle because of hyperkinesis of the basal segments and apical dyskinesia are characteristic of this syndrome. These symptoms are usually fully resolved within a few weeks. We also present a brief review of the current state of its diagnosis and treatment (AU)

Dermatitis alérgica de contacto por corticoides / Allergic contact dermatitis to corticosteroids

La dermatitis alérgica de contacto por corticoides representa un importante problema de diagnóstico clínico dado el cuadro de dermatosis crónica y atípica que puede originar. Para el diagnóstico disponemos de pruebas epicutáneas, las cuales presentan peculiaridades ya que el alérgeno posee propiedades antiinflamatorias. Los corticoides se clasifican en diferentes grupos según su probabilidad de producir reacciones cruzadas. Este hecho nos permite elegir el tipo más adecuado en un determinado paciente alérgico. Presentamos una paciente con dermatitis alérgica de contacto aclobetasol 17 propio nato, que refleja la dificultad de diagnóstico por su presentación como dermatosisparadójica (AU)

Allergic contact dermatitis to corticosteroids is a serious problem in clinical practice because of its chronic, atypical skin manifestations. Specific patch testing is used in diagnostic investigation, but the interpretation of the reactions may be difficult because of the anti-inflammatory properties of the corticosteroids. Corticosteroids are classified into different groups depending on the probability of allergic cross-reactivity between molecules. This classification enables us to choose the most suitable type for each specific patient. We present a patient with allergic contact dermatitis to topical clobetasol 17 propionate, which reflects the difficulty in diagnosing this paradoxical dermatosis (AU)