Introduction
Lower gastrointestinal bleeding is an ominous symptom associated with a
wide range of etiologies among them neoplasms (1). Most of the neoplasms
arising in the gastrointestinal tract are from the epithelium or
mesenchyme, with primary hematologic neoplasms representing a very low
proportion of total tumors (2). Epithelial and mesenchymal tumors can
have a polypoid endoscopic configuration, with histopathological tissue
analysis being necessary for distinction and definitive diagnosis.
Neoplasms deriving from the epithelium are most commonly adenomas and
adenocarcinomas while those deriving from the mesenchyme are primarily
gastrointestinal stromal tumors (GIST) (3). Furthermore, while tumors of
a neural origin in the gastrointestinal tract a rare, a wide range of
these tumors have been described (4–6). We present a case of a
symptomatic gastrointestinal schwannoma presenting as an ulcerated
colonic sessile mass.