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Updated: Nov 10, 2025

Laparoscopy-endoscopy Cooperative Surgery for the Treatment of Gastric Gastrointestinal Stromal Tumors
Published on: February 19, 2022
[A Case of the Large Rectal GIST Treated by Laparoscopic Anus Preserving Operation after Neoadjuvant Therapy with
Sakae Matsuzuka1, Yasuhito Iseki, Tatsunari Fukuoka
1Dept. of Surgery, Osaka City University Graduate School of Medicine.
A 50s old woman admitted to our hospital with anal pain, who was diagnosed as rectal gastrointestinal stromal tumor (GIST). After neoadjuvant therapy with imatinib mesylate for 6 months, the tumor reduced by 75% from its original size and anus preserving operation(low anterior resection)was performed. After operation adjuvant therapy with imatinib mesylate was performed for 2 years and 6 months. The patient is alive without recurrence 5 years after surgery. It is suggested that neoadjuvant therapy with imatinib mesylate is useful and safety for large rectal GIST, from the standpoint of anal preservation.
A 50s old woman admitted to our hospital with anal pain, who was diagnosed as rectal gastrointestinal stromal tumor (GIST). After neoadjuvant therapy with imatinib mesylate for 6 months, the tumor reduced by 75% from its original size and anus preserving operation(low anterior resection)was performed. After operation adjuvant therapy with imatinib mesylate was performed for 2 years and 6 months. The patient is alive without recurrence 5 years after surgery. It is suggested that neoadjuvant therapy with imatinib mesylate is useful and safety for large rectal GIST, from the standpoint of anal preservation.
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