Nodular fasciitis: Spontaneous resolution following diagnosis by fine‐needle aspiration

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<jats:title>Abstract</jats:title><jats:p>Nodular fasciitis can be histologically mistaken for a sarcoma. Typical cases are less than 5 cm and enlarge rapidly over days or weeks before diagnosis. The natural history of nodular fasciitis is unknown, since the diagnosis is usually based on excised lesions. Fine‐needle aspiration of nodular fasciitis has been described, and features benign‐appearing spindle cells (singly and in groups), collagen, and myxoid material. We describe 11 cases in which nonsurgical observation led spontaneously to complete resolution. Our study includes 7 males and 4 females (24 to 73 years of age; median = 42). Lesions were located in the arm (4), thigh (3), temporal area (2), breast (1) and the parotid (1) and ranged from 0.5 to 5.0 cm. (median = 1.5). They had been present for from less than 1 to 4 weeks (median = 2). In 9 cases, spontaneous resolution occurred in from 3 to 8 weeks (median = 4). Two other patients were lost to follow‐up for up to 11 months, after which resolution was noted. Small palpable masses in the subcutaneous soft tissues which evolve over a short period of time and show the cytologic features of nodular fasciitis should be managed nonsurgically. If resolution does not occur within a few weeks, surgery can then be performed. Diagn Cytopathol 1993;9:322‐324.</jats:p>

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