LAMN is also known to be a cause of pseudomyxoma peritonei (PMP), a condition where mucin leakage into the peritoneal cavity can lead to recurrence or disease progression [2,8]. Careful preoperative and intraoperative evaluation of the tumor’s localization and the risk of mucin leakage is crucial. The gene discussed is MUC5AC; the disease is pseudomyxoma peritonei.