Mucinosis folicular primaria: simulando una tiña corporal

Abstract

La mucinosis folicular se caracteriza por depósito anómalo de mucina en los folículos pilosos y glándulas sebáceas. Puede corresponder a un trastorno idiopático benigno y autolimitado especialmente en niños, o representar un cuadro secundario a un trastorno mieloproliferativo, generalmente un linfoma cutáneo T. Presentamos el caso de una niña de 10 años de edad con varias placas eritematoblanquecinas circulares ocasionalmente pruriginosas en cara, cuello y tronco, además de alopecia difusa de 5 meses de evolución. No hay ataque al estado general. El estudio histopatológico reportó un cuadro compatible con mucinosis folicular.

Follicular mucinosis is characterized by mucin deposits within the hair follicles and sebaceous glands. It can occur as a primary idiopathic benign disorder; it can; or it can arise as a secondary symptom of a malignant disorder, most commonly mycosis fungoides. Youth and localization in a single area used to be regarded as indicative of the benign nature of follicular mucinosis. We report the case of a 10 -year old girl who presented with a 5- months history of a multiple, slightly pruritic, erythematous patches on her face, neck and chest. Different local treatments were ineffective. Overall, she was healthy. Histopathological examination of the lesion showed the typical histological picture of follicular mucinosis.