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Arch Surg. 2004;139:224.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Answer: Desmoid Tumor

Figure 1. Computed tomographic scan of the abdomen and pelvis demonstrating a large, homogeneous mass of approximately 23 x 15 cm.

Figure appears in full text version. Figure 1.

Figure 2. Biopsy specimen taken from the intra-abdominal tumor showing the same appearance as the incisional biopsy specimens taken from the mesentery: a paucicellular to cellular proliferation of bland-looking fibroblasts, infiltrating muscle and engulfing muscle fibers (black arrowheads). No mitoses are seen. Immunohistochemical analysis was negative for CD117 (poly C-kit) and estrogen receptors but weakly positive for progesterone receptors.

Figure appears in full text version. Figure 2.

Desmoid tumors are benign in origin and do not metastasize. However, they can be aggressive locally and have a tendency for local recurrence after excision.^1-2 Their ability for local infiltration can result in significant deformity, morbidity, and mortality. Desmoid tumors in the general population are rare, accounting for 0.03% of all neoplasms.^3-4 There is an association between the occurrence of desmoid tumors and familial . . . [Full Text of this Article]

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