A Rare Presentation of Low-Grade Appendiceal Mucinous Neoplasm in a Routine Appendicectomy Specimen

Low grade appendiceal mucinous neoplasm (LAMN) is a rare malignancy which is mostly discovered incidentally and can present with a variety of symptoms depending on the clinical manifestations. Due to an extensive accumulation of copious gelatinous material in the appendiceal lumen, the appendix becomes cystically dilated. It can be detected on 0.7 to 1.7% of all appendicectomies. The most concerning side effect of this neoplasm is mucin seeding, which might result in pseudomyxoma peritonei (PMP). Herein we report a 42-year-old female with lower abdominal pain associated with nausea and regurgitation for 1 week. A clinical diagnosis of acute appendicitis was made and laparoscopic appendicectomy was performed. Histopathological study of the appendix revealed a low grade appendiceal mucinous neoplasm.