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  • Title: Surgical management of rectal gastrointestinal stromal tumors.
    Author: Tielen R, Verhoef C, van Coevorden F, Reyners AK, van der Graaf WT, Bonenkamp JJ, van Etten B, de Wilt JH.
    Journal: J Surg Oncol; 2013 Mar; 107(4):320-3. PubMed ID: 22806955.
    Abstract:
    BACKGROUND: Five percent of gastrointestinal stromal tumors (GISTs) are primarily localized in the rectum. We analyzed the outcome of multimodality treatment for rectal GIST in a multicenter retrospective series. METHODS: All surgically treated patients with a rectal GIST were identified from four specialized centers in the Netherlands. Primary endpoints were disease-free survival (DFS) and overall survival (OS). RESULTS: Thirty-two patients (22 men and 10 women) with rectal GISTs were identified. Twenty-two patients received imatinib before surgery for a median of 9 (range 2-53) months (Group 1). Ten patients received no imatinib because of small tumor size or lack of availability (Group 2). Median tumor size before treatment was 9.3 (range 6-17) cm in Group 1 and median 6 (range 4-14) cm in Group 2. A complete resection was possible in 17/22 (77%) patients in Group 1 versus 7/10 (70%) in Group 2. Median DFS was not reached in Group 1, while it was 36 months in Group 2. Median OS was not reached in both groups. CONCLUSIONS: Preoperative imatinib leads to downsizing of the tumors in Group 1. However, it has not led to less extensive surgery. The DFS is longer in patients treated with pre- and post-operative imatinib, without an effect on OS.
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