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( Kyung-nam Bae ),( Kihyuk Shin ),( Woo-il Kim ),( Min-young Yang ),( Won-ku Lee ),( Gun-wook Kim ),( Hyun-chang Ko ),( Byung-soo Kim ),( Moon-bum Kim ),( Hoon-soo Kim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1
Nodular fasciitis (NF) is a rare benign fibrous tumor related with a proliferative reactive process arising mostly from the muscular fascia or deep subcutaneous region. It distinctively appeared as solitary nodule in young-aged patient with rapid growth, which gives its other name as pseudosarcomatous fibromatosis. A 16-year old boy visited our clinic for the palpable mass on the left shoulder. The initial lesion had already been partially removed by the skin biopsy at local clinic. The biopsy specimen showed only fragments of fibrous mass consisting of collagenous stroma with spindle-shaped cells, but no atypia or mitotic figure. Surgical excision was performed, of which the surgical specimen showed invasion of spindle shaped cells involving subcutaneous layer interlacing with conspicious collagenous fiborus stroma without malignant features. After 3 months, two nodules reappeared near the operation sites and the following biopsy results showed the same as before. We decided to observe the remaining lesions and there had been no significant changes for 5 months. Multiple lesional occurrence is as quite uncommon feature of NF as the recurrence after surgical treatment. Herein, we report a rare case of multiple recurrence of NF after surgical extirpation, which presented with in-transit metastasis of sarcoma-like feature.
Pseudosarcomatous Fibromatosis in the Masseter Muscle
김호준,신홍인,최소영 대한구강악안면병리학회 2019 대한구강악안면병리학회지 Vol.43 No.2
Pseudosarcomatous fibromatosis (PSF), also known as nodular fasciitis and pseudosarcomatous fasciitis, is a rare, benign proliferation of fibroblasts and myofibroblasts. It is often misdiagnosed as sarcoma because of its characteristic rapid progression, leading to unnecessary and aggressive surgery. Here we report a case of PSF found in the masseter muscle in a 26-year-old female. The mass that could be misdiagnosed because of its rapid growth characteristics was surgically excised by an intraoral approach and diagnosed as PSF by histopathologic examinations.