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Nodular fasciitis in the forehead.

Histologically, nodular fasciitis is observed as similar to sarcoma in soft tissues, and it is referred to as pseudosarcomatous fasciitis. Its histologic findings can be summarized as spindle-shaped fibroblasts, intercellular space between fibroblasts, red blood cells released to the extravascular area, and deposition of mucus within the interstitium. The lesion looks similar to sarcoma histologically and shows the characteristic of rapid growth, which in result is readily misdiagnosed as malignancy. It occurs preferentially in the upper extremities, whereas rarely occurring in the head and neck region. When we encounter subcutaneous nodules of the head and neck region, it is important to keep nodular fasciitis in mind as a differential diagnosis to avoid unnecessary wide resection. In this article, we report a rare case of nodular fasciitis on the forehead and some reviews of the literature.