Benign lesions of the gastrointestinal tract that may be misdiagnosed as malignant tumors.

Benign lesions of the gastrointestinal tract (GIT) that may be misdiagnosed as malignant tumors are described and illustrated in this review. The clinicopathologic features that are important for the accurate diagnosis of each lesion are presented in detail. The entities chosen for discussion include inflammatory pseudotumors (IPT), pseudosarcomatous granulation tissue in GI polyps, pseudocarcinomatous invasion in GI polyps, and GI ulcers induced by radiation and chemotherapy.