Abstract: Clear cell acanthoma is an uncommon type of benign epithelial tumor. Typically, it is a solitary lesion found on the lower limbs. It presents as a nodule or small plaque with slow and well-defined growth. Diagnosis used to be clinical and histopathological, but the advent of dermoscopy has led to an increase in diagnostic accuracy. We describe a case in which dermoscopy proved highly useful for diagnosis of the lesion.

A doença de Fox-Fordyce é uma dermatose inflamatória rara que afeta predominantemente mulheres jovens e caracteriza-se por múltiplas pápulas foliculares cor da pele ou acastanhadas, muito pruriginosas, localizadas nas áreas ricas em glândulas apócrinas. A histopatologia demonstra espongiose focal da porção superior do infundíbulo, com fibrose perifolicular e infiltrado linfohistiocítico. O diagnóstico é baseado na clínica e no exame histopatológico. Muitas opções de tratamento já foram descritas, porém nenhuma delas é excelente. Optamos pelo adapaleno 0,1% tópico e foi observada melhora satisfatória dos sinais e sintomas da doença.

The Fox-Fordyce disease is a rare inflammatory dermatosis that affects mainly young women and is characterized by multiple follicular papules, skin color or brownish, very itchy, localized in areas rich in apocrine glands. Histopathology shows focal spongiosis of the upper infundibulum with fibrosis and perifollicular lymphohistiocytic infiltrate. The diagnosis is based on clinical and histopathological examination. Many treatment options have been described; however none of them is excellent. We chose the topic adapalene 0.1% and a satisfactory improvement of the signs and symptoms of the disease was observed.