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1. an unencapsulated, locally invasive, and rarely metastasizing fibromatous tumor arising in the muscle sheath, usually of the abdominal wall, which closely resembles fibrosarcoma. Called also desmoid tumor.
2. fibroid (def. 1).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.