A 63-year-old woman was admitted to our hospital with suspected appendicitis. Abdominal CT revealed an enlarged appendix, and findings consistent with some small nodules. She was diagnosed with appendicitis and successfully treated with antibiotics. Contrast-enhanced CT performed 2 months after discharge revealed a reduction in small nodules, and tumor markers were not elevated. Therefore, we concluded that this case was unlikely to be an appendiceal tumor. Interval appendectomy was performed laparoscopically, and histopathological analysis revealed a low-grade appendiceal mucinous neoplasm(LAMN). Herein, we present this case and review the relevant literature.
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A scoping review of postoperative surveillance strategies for localized, low-grade appendiceal mucinous neoplasms.
Am J Surg
January 2025
Department of Surgery, University of Calgary Cumming School of Medicine, Calgary, Canada, T2N 1N4.
Introduction: There is a paucity of data to support surveillance protocols for localized, low-grade appendiceal mucinous neoplasms (LAMNs) after resection.
Methods: A search strategy was developed to identify postoperative surveillance strategies for LAMNs, in the context of rates of recurrence and disease-free survival, and applied to four literature databases. Resultant citations were subject to screening in duplicate, in three stages: title, abstract, and full-text.
Long term outcomes associated with the use of perioperative systemic chemotherapy on low grade appendiceal mucinous neoplasms with pseudomyxoma peritonei treated with cytoreductive surgery and hyperthermic intraperitoneal chemotherapy.
Front Oncol
January 2025
Department of Surgery, Division of Surgical Oncology, University of Texas Southwestern Medical Center, Dallas, TX, United States.
Introduction: Low grade appendiceal mucinous neoplasms (LAMN) are indolent tumors that lack invasive potential but may present as pseudomyxoma peritonei. Cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) significantly improves both overall and recurrence free survival. While systemic chemotherapy is generally considered ineffective for LAMN, little literature is available to support this notion.
View Article and Find Full Text PDFConnecting the dots: Low-grade appendiceal mucinous neoplasms and serrated polyps in the appendix.
Am J Clin Pathol
January 2025
Department of Pathology, Immunology, and Laboratory Medicine, University of Florida College of Medicine, Gainesville, FL, United States.
Objective: This study aimed to examine the relationship between low-grade appendiceal mucinous neoplasms (LAMNs) and serrated polyps (SPs) of the appendix, both characterized by KRAS mutations and overlapping morphologic features.
Methods: We analyzed 27 cases of LAMN and 24 cases of SP from archival records, reviewed pathology, and performed molecular analysis on select cases. Four cases initially diagnosed as LAMN were excluded for not meeting diagnostic criteria, and 1 SP case was reclassified as LAMN.
A Rare Cause of Abdominal Pain: Low-Grade Appendiceal Mucinous Neoplasm.
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Department of Gastroenterology, General Hospital of Northern Theater Command, No. 83 Wenhua Road, Shenyang, 110000, Liaoning Province, China.
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Department of Surgery, Kitakyushu City Yahata Hospital, Kitakyushu, JPN.
A low-grade appendiceal mucinous neoplasm (LAMN) is a rare condition, occurring in 0.08-4.1% of appendectomy cases.
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