Related Experiment Video
Updated: Feb 15, 2026

Endoscopic Approach for Colloid Cyst Resection
Published on: May 23, 2025
Simultaneous endoscopic full-thickness resection of two synchronous colonic granular cell tumours
Philipp Schreiner1, Piero Valli1, Ewerton Marques Maggio2
1Department of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland.
Abstract:
Granular cell tumours (GCTs) are rare soft tissue tumours originating from Schwann cells. Due to potential malignant transformation, complete endoscopic resection should be aimed for. We report on a 49-year-old patient with two synchronous GCTs found in the caecum and the ascending colon, respectively. Synchronous endoscopic full-thickness resection (EFTR) using an all-in-one full-thickness resection device (FTRD) was performed under propofol sedation. Completeness of resection was proven histologically. No adverse events occurred. We report safe and complete simultaneous EFTR of two synchronous colonic GCTs.
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