A Case of Nodular Fasciitis Misdiagnosed as Baker's Cyst in a Patient with Rheumatoid Arthritis / 대한류마티스학회지

Nodular fasciitis is rare and benign fibroblastic proliferative disease which tends to be confused microscopically with spindle cell sarcoma. It is a distinctive lesion and a very important one because of its ability to simulate a malignant process. Histopathologically, nodular fasciitis can be grouped into three subtypes based on their relation with the fascia: subcutaneous, fascial, intramuscular. We report a case of nodular fasciitis misdiagnosed as Baker's cyst in a patient with rheumatoid arthritis.