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Open Access Highly Accessed Research

Surgical resection should be taken into consideration for the treatment of small gastric gastrointestinal stromal tumors

Jianjun Yang, Fan Feng, Mengbin Li, Li Sun, Liu Hong, Lei Cai, Wenbin Wang, Guanghui Xu and Hongwei Zhang*

Author Affiliations

Department of Digestive Surgery, Xijing Hospital of Digestive Diseases, the Fourth Military Medical University, 127 West Changle Road, 710032, Xi’an, Shaanxi, China

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World Journal of Surgical Oncology 2013, 11:273  doi:10.1186/1477-7819-11-273

Published: 13 October 2013

Abstract

Background

The National Comprehensive Cancer Network (NCCN) recommends conservative follow-up for gastric gastrointestinal stromal tumors (GISTs) less than 2 cm. The aim of the present study was to investigate the clinical and pathological features of small gastric GISTs, re-evaluate the risk potential, and discuss the treatment strategy of small gastric GISTs.

Methods

In this retrospective study, 63 cases of small gastric GISTs (less than 2 cm) were resected surgically from May 2010 to March 2013 in our department. Clinicopathological factors were collected and the malignant potential of small gastric GISTs was analyzed.

Results

The mitotic index of 14 out of 63 cases (22.22%) exceeded 5. The malignant potential of small gastric GISTs was related to tumor location (P = 0.0218). The mitotic index of 4 out of 8 GISTs (50%) located in gastric cardia exceeded 5, 8 out 28 GISTs (28.57%) located in the gastric fundus exceeded 5, and only 2 out of 27 GISTs (7.41%) located in the gastric body exceeded 5. We also discovered a good consistency between mitotic index and Ki-67 expression of small gastric GISTs.

Conclusions

Gastric GISTs less than 2 cm also have malignant potential. Thus, we recommended surgical resection of all small gastric GISTs once diagnosed.

Keywords:
Gastric gastrointestinal stromal tumor; Malignant potential; Mitotic index; Gene mutation