A case report of advanced pancreatic neuroendocrine carcinoma with Ki67 80%, CPS 0, and pMMR achieving durable complete response for over 7 years after combination immunotherapy.

ABSTRACT:

Background

Pancreatic neuroendocrine carcinoma (pNEC) is a rare and aggressive malignancy. For patients with metastatic pNEC, the response to first-line chemotherapy remains unfavorable, with a median overall survival of less than one year. Furthermore, there are no standard-of-care therapeutic options following disease progression, representing a significant unmet clinical need.

Case presentation

This is a case report of a patient diagnosed with metastatic pNEC presenting with upper abdominal pain, testing 80% positive for the Ki67 marker, a combined positive score (CPS) of 0, and proficient mismatch repair (pMMR). Following progression after chemotherapy, the patient received combination immunotherapy, involving multi-site, multi-dose, and multi-type radiotherapies combine

SUBMITTER: Fan W 

PROVIDER: S-EPMC12702980 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature