Pulmonary pleura metastasis from low-grade appendiceal mucinous neoplasm with appendiceal neuroendocrine tumor: A Case Report [post]

Jie Gao, Ruirui Fan, Mingzhi Lu
2022 unpublished
According to the recent World Health Organization (WHO) classification, appendiceal mucinous tumours include low-grade mucinous appendiceal neoplasm (LAMN), high-grade mucinous appendiceal neoplasm (HAMN), and mucinous adenocarcinoma. LAMN is almost the rarest appendiceal tumor with an incidence of about 0.7–1.7%. A ruptured appendiceal mucinous neoplasm can lead to progressive accumulation of mucus in the peritoneal cavity, resulting in pseudomyxoma peritoneum (PMP) with the chance of
more » ... s and recurrence. Appendiceal neuroendocrine tumor (ANET) is the most frequent appendiceal lesion. A collision between LAMN and ANET is an exceedingly rare condition. So far, evaluating the literature, just 10 cases of collision LAMN and ANET have been reported. Here, we report a case of pulmonary pleura metastasis from LAMN with ANET. Our work will help to improve the accuracy of the diagnosis and avoid misdiagnosis.
doi:10.21203/rs.3.rs-1549098/v1 fatcat:xqtvhprdxjdanceyj6l66w623y