Mesenteric Leiomyoma Mimicking Recurrence of Rectal Cancer—A Case Report—

RIFU Kazuma, INOSE Satoshi, CHIBA Saya, KUBOKI Daigo, ITO Homare, KURIHARA Katsumi

doi:10.3919/jjsa.84.1065

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早期直腸癌術後再発と鑑別困難なPET集積を伴う腸間膜平滑筋腫の1例
ソウキチョクチョウガンジュツゴサイハツトカンベツコンナンナ PET シュウセキオトモナウチョウカンマクヘイカツキンシュノ 1レイ

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Abstract

<p>Leiomyomas of the mesentery are relatively uncommon, with few reports of mesenteric leiomyomas in the literature. A case of a mesenteric leiomyoma is presented. The patient, a 64-year-old man, had undergone surgery for rectal carcinoma one year earlier and was found to have a mesenteric tumor close to the inferior mesenteric artery on the postoperative follow-up. An FDG-PET scan showed hyperaccumulation in the tumor. Preoperatively, the diagnosis was a mesenteric tumor suspected as recurrence of rectal carcinoma. Subsequently, the patient underwent resection of the tumor. Histological examination of the tumor by hematoxylin and eosin staining showed a spindle cell tumor, and immunohistochemical studies were negative for c-kit and CD34, but positive for desmin. The final pathological diagnosis was mesenteric leiomyoma. The differential diagnosis of mesenteric leiomyoma and recurrence of rectal cancer can be challenging due to the similarity in imaging findings. This is a rare case of a mesenteric leiomyoma mimicking recurrence of rectal cancer.</p>

Journal

Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association)

Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association) 84 (7), 1065-1069, 2023

Japan Surgical Association

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