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. 2004 Aug 15;10(16):2444-6.
doi: 10.3748/wjg.v10.i16.2444.

Role of endoscopic miniprobe ultrasonography in diagnosis of submucosal tumor of large intestine

Ping-Hong Zhou  1 , Li-Qing Yao, Yun-Shi Zhong, Guo-Jie He, Mei-Dong Xu, Xin-Yu Qin
Affiliations

Role of endoscopic miniprobe ultrasonography in diagnosis of submucosal tumor of large intestine

Ping-Hong Zhou et al. World J Gastroenterol. .

Abstract

Aim: 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.

Conclusion: 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.

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Figures

Figure 1
Figure 1
EUS imagines of normal wall and SMT of the large intestine. A: The normal wall was displayed in 5 layers; B: Li-poma imagine showed a hyperechoic homogeneous mass lo-cated in the third layer; C: Leiomyoma imagine showed a hypoechoic homogeneous mass originated from the 4th layer; D: Rectal carcinoid imagine showed a submucosal hypoechoic mass with a homogenous echo.
See this image and copyright information in PMC

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