Abstract: Ductal eccrine carcinoma (DEC) is a rare sweat gland carcinoma with ductular differentiation. Clinically, it is characterized by a slowly growing, hardened plaque or nodule predominantly located on the head and neck. Histologically, DEC shares similar features to invasive breast carcinoma, thus causing great diagnostic challenges. We report a 69-year-old woman who presented with a hardened plaque on the axilla. A skin biopsy was performed and metastatic invasive breast carcinoma could not be ruled out. Complete excision and further workup were subsequently conducted, leading to the diagnosis of estrogen receptor positive DEC with associated axillary lymph node metastases. The patient received adjuvant radiotherapy to the left axilla and was started on oral letrozole. She is disease-free 14 months after initial diagnosis.

Abstract: Nevus spilus is a melanocytic cutaneous lesion consisting of a light brown background macule with numerous superimposed darker maculopapular speckles. Melanoma arising from a nevus spilus is rare, with less than 40 cases reported to date. The absolute risk for malignant transformation is not well defined, lacking a standardized management approach. We report a new case of melanoma arising from nevus spilus, with the additional peculiarity of multifocality. We offer our recommendations for the management of the condition.

Abstract Brachioradial pruritus is a chronic sensory neuropathy of unknown etiology which affects the skin of the shoulders, arms and forearms on the insertion of the brachioradialis muscle. We describe the case of a 60-yearold woman recently diagnosed with multiple myeloma who refers paresis, severe pruritus and itching lesions on the right arm with 6 months of evolution. Investigation led to a diagnosis of Brachioradial pruritus consequent to the presence of cervical disc herniation and Parsonage-Turner syndrome. The patient started gabapentin 900mg/day with good control of itching. Corticosteroids and antihistamines are often ineffective in the treatment of BP. Gabapentin has been used with encouraging results. All patients with Brachioradial pruritus should be evaluated for cervical spine injuries.

Tinea corporis is a dermatophyte infection of the body. It usually begins as a pruritic circular or oval erythematous scaling patch or plaque that spreads centrifugally. Multiple lesions may run together to produce “flower petal” configurations. Tinea corporis contracted from infected animals is often intensely inflammatory. The history and clinical picture combination is characteristic, but the diagnosis could be confirmed by KOH (potassium hydroxide) examination of scrapings from the lesions. Tinea corporis usually responds to the daily application of topical antifungals, but systemic therapy is needed in patients who have failed topical therapy. We report a case of a two-year old girl with tinea corporis of the vulvar region, initially misdiagnosed as irritant diaper dermatitis.

A doença de Crohn é uma doença granulomatosa multissistêmica inflamatória crónica que afecta primariamente o tracto gastrointestinal. Na maioria dos casos, as manifestações cutâneas sucedem a doença intestinal, mas, ocasionalmente, as lesões dermatológicas são o primeiro evento e podem constituir o único sinal da doença. O envolvimento vulvoperineal é raro, pode preceder os sintomas intestinais em meses ou anos, e pode passar despercebido. Devido à escassez de relatos de doença de Crohn com esta localização e na ausência de ensaios clínicos randomizados, não há nenhum tratamento padrão para a doença cutânea. Descrevemos um caso de uma mulher de 47 anos com doença de Crohn vulvoperineal sem envolvimento digestivo, que foi tratada com sucesso com metronidazol.

Crohn's disease is a multisystem chronic granulomatous inflammatory disease that primarily affects the gastrointestinal tract. In the majority of the cases, the cutaneous manifestations follow the intestinal disease, but occasionally dermatological lesions are the inaugural event and may constitute the only sign of the disease. Vulvoperineal involvement is rare, may precede bowel symptoms by months to years and may go unrecognized. Due to the paucity of reports of Crohn's disease at this location and in the absence of randomized trials, there are no standard treatments for the cutaneous disease. We describe the case of a 47 year-old woman with vulvoperineal Crohn's disease without digestive involvement, that was successfully managed with metronidazole.

Descrevemos um caso clínico de uma variante rara de pênfigo - pênfigo herpetiforme - que combina os aspectos clínicos da dermatite herpetiforme com os achados imunológicos do pênfigo. Devido à sua apresentação atípica, é frequentemente diagnosticado equivocamente como dermatite herpetiforme. Caracteriza-se essencialmente pelo padrão herpetiforme das lesões cutâneas, prurido intenso e presença de espongiose eosinofílica no exame histopatológico. Enfatizamos a excelente resposta terapêutica à dapsona.

We report a clinical case of a rare variant of pemphigus - pemphigus herpetiformis - which combines the clinical features of dermatitis herpetiformis with the immunological findings of pemphigus. Due to its atypical presentation, it is frequently misdiagnosed as dermatitis herpetiformis. It is basically characterized by the herpetiform pattern of skin lesions, severe pruritus and by the presence of eosinophilic spongiosis confirmed on histopathology. We call attention to the excellent response to dapsone.

Gianotti-Crosti syndrome (GCS) is a disease characterized by a symmetrical erythematopapulous, acral-based eruption. It affects mainly children under four years of age. In most cases a relationship with a viral infection or a vaccine can be established. The course of GCS is benign and self-limited, the manifestations disappearing within two to eight weeks, with no recurrence. We report the case of a five year-old girl who developed a Gianotti-Crosti Syndrome after an upper respiratory infection.