LAUSR

BACKGROUND Nodular fascitiis is a myofibroblastic neoplasm of the soft tissue that rarely affects oral cavity. With a broad pattern of presentation, sometimes Nodular Fascitiis can have a rapid growth and appear highly cellular with local aggressiveness on biopsies, thus simulating a sarcoma. The aim of this paper is to present a case of troublesome diagnosis of nodular fascitiis mimicking a Malignant Fibrous Histiocytoma, with the purpose of alert clinicians and pathologists on the difficulties that can be met in the differential diagnosis between these 2 lesions. A 42-year-old male presented an exophytic lesion on the cheek. After the excisional biopsy, histological and immunohistochemical evaluations revealed a picture of doubtful significance. With a careful analysis, the diagnosis of nodular fasciitis was made and the patient was not further treated. At a 3-year follow-up, no recurrence was found. Differential diagnosis within myofibroblastic neoplasm can be a real challenge for both Clinicians and Pathologist. A coordinated team-work is mandatory to avoid clinical malpractice and unnecessarily aggressive treatment.