Role of endoscopic miniprobe ultrasonography in diagnosis of submucosal tumor of large intestine.
OBJECTIVE
To evaluate the role of miniprobe ultrasonography under colonoscope in the diagnosis of submucosal tumor of the large intestine, and to determine its imaging characteristics.


METHODS
Thirty-five patients with submucosal tumors of the large intestine underwent miniprobe ultrasonography under colonoscope. The diagnostic results of miniprobe ultrasonography were compared with pathological findings of specimens by biopsy and surgical resection.


RESULTS
Lipomas were visualized as hyperechoic homogeneous masses located in the submucosa with a distinct border. Leiomyomas were visualized as hypoechoic homogeneous mass originated from the muscularis propria. Leiomyosarcomas were shown with inhomogeneous echo and irregular border. Carcinoids were presented as submucosal hypoechoic masses with homogenous echo and distinct border. Lymphangiomas were shown as submocosal hypoechoic masses with cystic septal structures. Malignant lymphomas displayed as hypoechoic masses from mucosa to muscularis propria, while pneumatosis cystoids intestinalis originated from submucosa with a special sonic shadow. One large leiomyoma was misdiagnosed as leiomyosarcoma.


CONCLUSIONS
Endoscopic miniprobe ultrasonography can provide precise information about the size, layer of origin, border of submucosal tumor of the large intestine and has a high accuracy in the diagnosis of submucosal tumor of the large intestine. Pre-operative miniprobe ultrasonography under colonoscope may play an important role in the choice of therapy for submucosal tumor of the large intestine.
Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China. chow@zshospital.net
Ping-Hong
PH
Zhou
Li-Qing
LQ
Yao
Yun-Shi
YS
Zhong
Guo-Jie
GJ
He
Mei-Dong
MD
Xu
Xin-Yu
XY
Qin
D000328:Adult; D000368:Aged; D002276:Carcinoid Tumor / Q000000981:diagnostic imaging / Q000473:pathology; D003113:Colonoscopy; D016099:Endoscopy, Gastrointestinal / Q000379:methods*; D006801:Humans; D007413:Intestinal Mucosa / Q000000981:diagnostic imaging / Q000473:pathology*; D007414:Intestinal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D007889:Leiomyoma / Q000000981:diagnostic imaging / Q000473:pathology; D008067:Lipoma / Q000000981:diagnostic imaging / Q000473:pathology; D008875:Middle Aged; D014463:Ultrasonography