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- Ryuzo Deguchi, Takashi Ueda, Motoki Kaneko, Yoshitaka Arase, Kota Tsuruya, Aya Kawanishi, Toshiki Kodama, Masashi Morimachi, Takashi Ogimi, and Tatehiro Kagawa.
- Department of Gastroenterology, Tokai University School of Medicine, Japan.
- Intern. Med. 2024 Sep 15; 63 (18): 251925232519-2523.
AbstractA 71-year-old woman was found to have submucosal tumor-like lesion on colonoscopy (CS) before gastric surgery, and computed tomography (CT) showed a 12-mm structure at the base of the appendix. The lesion could not be clearly detected on CT nine months later, but it had enlarged again on CT one year later; therefore, CS and endoscopic ultrasound (EUS) were performed. The lesion was determined to be cystic with viscous contents, and laparoscopic appendicectomy was performed. This is the first report of low-grade appendiceal mucinous neoplasm (LAMN) diagnosed by a histopathologic examination of a resected specimen showing shrinkage and re-expansion of the appendix.
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