Full Thickness Resection of a Rare Cecal Granular Cell Tumor

Document Type

Conference Proceeding

Publication Date

10-1-2024

Publication Title

Am J Gastroenterol

Abstract

Introduction: We present an interesting case of a 40-year-old patient who underwent colonoscopy and was found to have a granular cell tumor in the cecum. Case Description/Methods: Our patient is a wonderful 40-year-old woman with a history of alternating diarrhea and constipation for several years. She had 2 weeks of dark blood in her stool, bloating, and weight gain. She undergoes a colonoscopy which notes a submucosal nodule in the cecum. Biopsy reveals submucosal proliferation of large bland polygonal cells with granular cytoplasm and small oval nuclei. S100 and CD68 immunohistochemical stains are positive within the polygonal granular cells, confirming the diagnosis of a granular cell tumor. Surgical resection is considered. However, it is felt that the tumor can be completely removed endoscopically. She undergoes colonoscopy which notes a 5 mm submucosal nodule in the cecum. Standard endoscopic resection is not attempted since the nodule is in the submucosa. A FTRD (Full Thickness Resection device) is loaded onto the scope. The lesion is pulled into the FTRD cap via the FTRD forceps. Full thickness resection is then performed using the FTRD device by deploying the clip and closing the snare, cutting the lesion in full thickness with hot snare on auto-cut. The patient tolerates the procedure well. Pathology reveals a granular cell tumor with clear margins. The patient denies any problems following the procedure. The patient is recommended to continue routine colon cancer screening. Discussion: Granular cell tumors are usually benign neoplasms that are most likely derived from Schwann cells. They are mostly seen in the oral cavity, skin, and subcutaneous tissues. When the gastrointestinal tract is involved, the most common sites are the esophagus, duodenum, anus, and stomach. Granular cell tumors of the cecum can usually be resected endoscopically. However, in some cases, laparoscopic resection has been performed, and may be preferred when the endoscopic procedure has a substantial risk of perforation. Resection is generally curative, however, in rare cases local recurrence has been reported. In extremely uncommon cases, malignant granular cell tumors have been described which require additional follow up.

Volume

119

Issue

10

First Page

S1903

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