Granulomatous slack skin T-cell lymphoma: An important differential diagnosis with giant cell tumor of soft tissue

Granulomatous slack skin is an indolent t-cell lymphoma,considered to be a variant of mycosis fungoides. clinically it is characterized by areas of redundant skin,wrinkled,inelastic,with variable erythema and infiltration besides a poikilodermic surface. a differential diagnosis unknown to most dermatologists is the giant cell tumor of soft tissue,which is an extremely rare low-grade sarcoma. the authors report a patient who had undergone extensive surgery because of a primary diagnosis of giant cell tumor of soft tissue,but which proved to be granulomatous slack skin after a second interventional procedure with confirmatory histopathology. © 2015 by anais brasileiros de dermatologia.