Superficial mycoses at the Hospital do Servidor Público Municipal de São Paulo between 2005 and 2011.

Background: Superficial mycoses are fungal infections limited to the outermost layers of the skin. Dermatophytic filamentous fungi and yeasts are the major causative agents of these mycoses. Dermatophytosis is one of the clinical conditions caused by fungal infections most commonly found in dermatological practice.

Sister Mary Joseph's nodule: a sign of internal malignancy.

The umbilicus can be affected by various skin diseases including metastasis of internal malignancies, at which point it is known as Sister Mary Joseph's Nodule. The authors report a case of Sister Mary Joseph's Nodule as the first sign of internal malignancy and highlight the importance for the dermatologist to recognize the condition.