Miofibroma cutáneo solitario “ulcerado” del adulto. Descripción de un caso / Solitary ulcerated cutaneous myofibroma in an adult. Case report

El miofibroma cutáneo solitario del adulto representa la variante adulta de la miofibromatosis infantil y se caracteriza, como su nombre indica, por lesiones únicas que se desarrollan en la dermis, sin tendencia a la regresión pero de naturaleza y comportamiento benignos. Presentamos un caso de miofibroma cutáneo solitario con ulceración de su superficie localizado en la palma derecha en una paciente de 24 años. No hemos encontrado referencias bibliográficas de miofibromas cutáneos del adulto ulcerados (AU)

Adult solitary cutaneous myofibroma is an adult counterpart of infantile myofibromatosis, characterized by solitary lesions that have a predilection for involvement of the dermis and show no tendency to regression, although their biological behaviour is entirely benign. We present a 24-year-old woman with a solitary, ulcerated lesion on her right palm. To our knowledge, there are no previous reports of solitary ulcerated cutaneous myofibroma in adults (AU)

Allergic contact dermatitis from naftifine in a child without cross-reaction to terbinafine.

Allergic contact dermatitis from naftifine has been scarcely described in the English literature, all of them in adults. We report a case of a 12-year-old girl who developed an acute eczema on her neck after application of a naftifine cream. This fact was confirmed by a patch-test study. We did not find a cross-reaction to terbinafine, a structurally linked allylamine.

Sclerosing sweat duct carcinoma mimicking dermatofibroma.

Sclerosing sweat duct carcinoma is an infrequent adnexal tumor, locally aggressive and with a high incidence of local recurrences. Its location is preferably cephalic and its clinical presentation often unspecific. We present a new case with an atypical location and the clinical appearance of a benign cutaneous lesion. Diagnosis was established after a histological and immunohistochemical study. A terminological review was done.

Spontaneous regression of Merkel cell carcinoma of the skin.

We report a 65-year-old man who presented with a Merkel cell carcinoma on his right ear, a small satellite nodule and regional lymph node metastases. No treatment was given because of his generally poor state of health. Spontaneous regression of all the lesions was observed within a month. Merkel cell carcinoma is a potentially aggressive tumour. Only four cases of spontaneous regression have been reported previously.

Cutaneous leiomyosarcoma in a child.

Superficial leiomyosarcomas are infrequent tumors that are very rare in childhood. We report on a 12-year-old white boy with a cutaneous leiomyosarcoma of his left groin. Immunohistochemical study revealed positive immunostaining with antibodies to vimentin, desmin, and smooth muscle actin. The tumor was removed with wide surgical margins.