Chemotherapy response in primary peritoneal small cell carcinoma.

Background: Small cell carcinoma (SCC) is a neuroendocrine tumor that usually originates in the lungs but can also arise from extrapulmonary sites. Extrapulmonary small cell carcinomas (EPSCCs) are aggressive and rare, with limited data guiding their management. This case report contributes to the literature by presenting the diagnosis and treatment of primary peritoneal SCC.