RESUMEN
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.
Asunto(s)
Carcinoma de Apéndice Cutáneo/patología , Histiocitoma Fibroso Benigno/patología , Neoplasias Cutáneas/patología , Neoplasias de las Glándulas Sudoríparas/patología , Adulto , Biopsia con Aguja , Carcinoma de Apéndice Cutáneo/diagnóstico , Carcinoma de Apéndice Cutáneo/cirugía , Diagnóstico Diferencial , Femenino , Humanos , Inmunohistoquímica , Neoplasias de las Glándulas Sudoríparas/diagnóstico , Neoplasias de las Glándulas Sudoríparas/cirugíaRESUMEN
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.
Asunto(s)
Carcinoma de Células de Merkel/patología , Neoplasias del Oído/patología , Oído Externo/patología , Regresión Neoplásica Espontánea/patología , Anciano , Humanos , Metástasis Linfática , MasculinoAsunto(s)
Nevo/inmunología , Neoplasias de las Glándulas Sudoríparas/inmunología , Adolescente , Adulto , Antígeno Carcinoembrionario/análisis , Femenino , Dermatosis de la Mano/patología , Humanos , Inmunohistoquímica , Masculino , Nevo/patología , Poroqueratosis/patología , Neoplasias de las Glándulas Sudoríparas/patologíaRESUMEN
Pachydermodactyly is a rare and benign form of digital fibromatosis with only a few cases described in the literature. We report two cases of pachydermodactyly affecting young men. In one of them a knuckle pad was found, and the fibromatous thickening of the skin affected not only the finger joints but also the dorsum of the hands. This case can be included in the particular clinical form named pachydermodactyly transgrediens.
Asunto(s)
Fibroma/patología , Dermatosis de la Mano/patología , Neoplasias Cutáneas/patología , Adolescente , Dedos , Humanos , MasculinoRESUMEN
Multiple clustered dermatofibromas constitute an uncommon entity, of which we have collected seven cases in the literature. We observed the case of a 4-year-old girl, who had dermatofibromas confluent in a central plaque of fibrous aspect, located in the lumbar region. The immunohistochemical study showed positive staining for Factor XIIIa antibody, confirming its origin in the dermal dendrocyte.
Asunto(s)
Histiocitoma Fibroso Benigno/diagnóstico , Neoplasias Cutáneas/diagnóstico , Preescolar , Femenino , Humanos , InmunohistoquímicaRESUMEN
Benign cephalic histiocytosis is a rare, benign, self-healing form of non-X histiocytosis. A case in a 3-month-old girl is reported. The papular eruption involved her face, neck, shoulders and upper trunk. Light and electron microscopic findings and clinical evolution confirmed the diagnosis. The differential diagnosis with the micronodular form of juvenile xanthogranuloma is discussed.