Polypoid peritoneal metastases from carcinoid neoplasms.

Area of Science:

• Oncology
• Pathology
• Surgical Oncology

Background:

• Carcinoid neoplasia is a type of neuroendocrine tumor.
• Intraperitoneal metastases from carcinoid tumors typically manifest as flat, sclerotic foci.

Observation:

• This report details two cases of lethal carcinoid neoplasia.
• The observed intraperitoneal metastases were polypoid, differing from the usual presentation.

Findings:

• The unusual polypoid morphology of intraperitoneal carcinoid metastases was identified.
• This presentation can be mistaken for other peritoneal conditions.

Implications:

• The findings highlight the importance of recognizing atypical carcinoid metastasis patterns.
• Surgeons and pathologists should consider carcinoid neoplasia when encountering polypoid intraperitoneal carcinomatosis.