RESUMO
Hidroacanthoma simplex (HS) is a rare benign intraepidermal tumor that originates in the acrosyringial portion of the eccrine duct. Clinically, they are well-defined lesions, flat or verrucous brownish plaque, and can be misdiagnosed with other types of benign or malignant tumors. Dermoscopy reveals small black globules and fine scales. The histopathology of HS is characterized by typical intraepidermal nests, well-circumscribed, composed of uniform basaloid and poroid cells within the acanthotic epidermis with cystic or ductal structures in the nests. We report a case of HS that changes its clinical appearance, dermoscopy, and histopathologic findings over time. Differential diagnoses included seborrheic keratosis, Bowen disease, melanoma, and malignant HS.
RESUMO
El hemangioendotelioma kaposiforme es un tumor vascular agresivo y raro que ocurre predominantemente en la infancia. Suele tener localización cutánea o retroperitoneal. Frecuentemente se asocia con el fenómeno de Kasabach-Merritt y ocasionalmente con linfangiomatosis. Las lesiones cutáneas deben ser diferenciadas clínicamente del hemangioma de la infancia, de los hemangiomas congénitos (RICH y NICH) y de otros tumores vasculares. Describimos un caso de hemangioendotelioma kaposiforme cutáneo en una niña de 10 años.
Kaposiform hemangioendothelioma is a rare aggressive vascular tumor that predominantly occurs at infancy and early childhood. It usually presents cutaneous or retroperitoneal location. It is frequently associated with Kasabach-Merritt phenomenon and occasionally with lymphangiomatosis. Cutaneous lesions must be clinically differentiated from infantile hemangiomas, congenital hemangiomas (RICH and NICH) and other vascular tumors. We present a case of cutaneous kaposiform hemangioendothelioma in a 10-year-old girl.
