Pathophysiology: Desmoid tumors are cytologically bland fibrous neoplasms originating from the musculoaponeurotic structures throughout the body. Desmoid tumors often appear as infiltrative, usually well-differentiated, firm overgrowths of fibrous tissue, and they are locally aggressive. The synonym aggressive fibromatosis describes the marked cellularity and aggressive local behavior.
Treatment: The primary treatment for desmoid tumor is primary surgery with negative surgical margins. In those patients who refuse surgery or are not surgical candidates, the treatment used is radiation therapy. Pharmacologic therapy with antiestrogens and prostaglandin inhibitors may also be used.
Major research: Long-term outcome of sporadic and FAP-associated desmoid tumors treated with high-dose selective estrogen receptor modulators and sulindac: a single-center long-term observational study in 134 patients. Desmoid Tumor of the Popliteal Fossa during Pregnancy: A total of 134 patients were included. 64 (47.8 %) patients had a confirmed diagnosis of FAP, 69 (51.5 %) patients were sporadic.