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. 2005 Dec;20(6):977-84.
doi: 10.3346/jkms.2005.20.6.977.

Gastrointestinal stromal tumors in Koreans: it's incidence and the clinical, pathologic and immunohistochemical findings

Kyoung-Mee Kim  1 , Dong Wook Kang, Woo Sung Moon, Jae Bok Park, Cheol Keun Park, Jin Hee Sohn, Jin Sook Jeong, Mee-Yon Cho, So-Young Jin, Jong Sang Choi, Dae Young Kang; Gastrointestinal Stromal Tumor Committee; Korean Gastrointestinal Pathology Study Group
Affiliations

Gastrointestinal stromal tumors in Koreans: it's incidence and the clinical, pathologic and immunohistochemical findings

Kyoung-Mee Kim et al. J Korean Med Sci. 2005 Dec.

Abstract

Seven hundred forty seven cases of gastrointestinal stromal tumors (GISTs) in Koreans who were diagnosed between 2001 and 2002 were analyzed to evaluate their occurrence and their clinical, pathologic and immunohistochemical findings. The most frequent location of tumor was in the stomach (63%), followed by the small intestine (30%), the colorectum (5%), and the esophagus (2%). c-kit expression was found in 93.6% of the cases, while CD34, SMA and S-100 protein was positive in 80.1%, 28.2%, and 20.2%, respectively. c-kit positivity was high in the stomach (94.2%) and small intestine (94.6%), while it was relatively low in the colorectum (85.0%), and esophagus (81.2%). The positivity for CD34 was correlated with the higher risk of GISTs (p = 0.04). Follow up of the patients showed that 58 primary GISTs patients died and 20 of these patients were recurrent or metastatic at the time of diagnosis. The pathologic diagnosis to predict the risk of aggressive behavior of GISTs was correlated with the numbers of tumor, clinical stage, epithelioid histologic type, cellularity, cellular atypia, necrosis, and mucosal invasion (p = 0.00). GISTs with a poor prognosis were closely related to the clinical stage at presentation, the locations of the tumor, and the ages of the patients.

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Figures

Fig. 1
Fig. 1
Distribution of the ages of the patients with gastrointestinal stromal tumors in 747 patients.
Fig. 2
Fig. 2
Distribution of the sizes of the gastrointestinal stromal tumors.
Fig. 3
Fig. 3
Anatomic locations of the gastrointestinal stromal tumors.
Fig. 4
Fig. 4
Clinical stages of the patients at the time of diagnosis.
Fig. 5
Fig. 5
Photograph of the representative findings of gastrointestinal stromal tumors. (A) Epithelioid type GIST. (B) Spindle cell type GIST. (C) Mixed epithelioid and spindle cell type GIST. (D) hyaline changes observed in GIST. (E) Myxoid changed observes in GIST. (F) Ischemic tumor necrosis observed in GIST. (G) Mucosal invasion observed in the small intestinal mucosa. (H) Skeinoid fibers observed in the small intestinal GIST. (I) Paraganglioma-like patterns observed in the small intestinal GIST.
Fig. 6
Fig. 6
c-kit expression according to the pathologic diagnosis defining the risk of aggressive behavior for the gastrointestinal stromal tumors.
See this image and copyright information in PMC

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