A Case of Ossifying Fasciitis in the Back of the Head

Abstract

 Ossifying fasciitis is a relatively rare subtype of nodular fasciitis. Herein, we report a 48-year-old woman presenting with an occipital swelling, which had increased in size over a period of 2 years. Magnetic resonance imaging suggested a benign soft tissue tumor, and resection was attempted under local anesthesia. However, the surgery was not completed due to severe calcification. Computed tomography revealed a calcified tumor, and resection was performed again under general anesthesia. Histopathological examination revealed bone formation, and a diagnosis of ossifying fasciitis was made. As ossifying fasciitis is a reactive proliferative lesion characterized by bone formation, assessment of calcification by computed tomography may aid diagnosis.