AT THE FOCAL POINT
A 68-year-old asymptomatic man with a colon polyp was referred for polypectomy. The medical history included hypertension, for which he was taking medication. Colonoscopy revealed a polypoid lesion about 13 mm in diameter on a long stalk, at 40 cm from the anal verge (A). Because the lesion was polypoid and freely mobile, there was no bridging fold. In addition, it appeared to be covered by normal mucosa. These findings suggested the diagnosis of a polypoid submucosal tumor. The lesion was removed by electrosurgical snare polypectomy (B). Grossly, the polyplike submucosal tumor consisted of whitish material that originated from the muscularis mucosa (C; H&E, orig. mag. !40). On histopathologic evaluation, a proliferation of spindle cells was noted, without evidence of significant cellular atypia or pleomorphism. No mitotic activity was detected (D; H&E, orig. mag. !400). Immunohistochem-
ical staining for c-kit was negative. Based on these findings, a diagnosis was made of a pedunculated leiomyoma.
Volume 61, No. 3 : 2005 GASTROINTESTINAL ENDOSCOPY 429
Dae Hee Han, MD Young Koog Cheon, MD Joo Young Cho, MD Yun Soo Kim, MD Joon Seong Lee, MD Moon Sung Lee, MD Chan Sup Shim, MD Institute for Digestive Research Digestive Disease Center Soon Chun Hyang University College of Medicine Seoul, Korea PII: S0016-5107(04)02644-6