title: [Isolated muscular sarcoidosis mimicking a tumoral lesion].
abstract: We report a case of a woman with a palpable painful nodule on her left leg. MR and CT showed a lesion that could be described as a neoplasm. Excisonal biopsy revealed a noncaseating granuloma. The woman presented the nodular type of muscular isolated sarcoidosis. Further the disease involved the lungs; this confirmed the accurate diagnosis of sarcoidosis. Sarcoidosis is a chronic, multisystem granulomatous disease of unknown etiology. Muscle involvement is frequent, but often asymptomatic. There are three forms of muscular sarcoidosis: only the nodular type can be recognized by technical imaging. MR and ultrasound are the best methods to attempt the diagnosis of nodular muscular sarcoidosis; nevertheless, the lesion must have a standardized behaviour because it can mimic a malignant neoform. In this case, biopsy is the only tool to identify the disease.
authors.affiliation: Servizio di Radiologia, Istituto Ortopedico Gaetano Pini, Milan. alecur@libero.it
authors.forename: A
authors.initials: A
authors.lastname: Curti
authors.forename: C
authors.initials: C
authors.lastname: Rampini
authors.forename: M
authors.initials: M
authors.lastname: Gallazzi
authors.forename: F
authors.initials: F
authors.lastname: Tramontana
authors.forename: G P
authors.initials: GP
authors.lastname: Garbagna
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000175:diagnosis; D009135:Muscular Diseases / Q000175:diagnosis*; D012507:Sarcoidosis / Q000175:diagnosis*