Cisplatin to Patients With Pancreatic Cancer and Homologous Recombination Deficiency

Inclusion Criteria: * Ability to understand and the willingness to sign a written informed consent document. * Age ≥ 18 years and ≤ 80 years. * Eastern Cooperative Oncology Group (ECOG) performance status 0-2. * Histologically or cytologically confirmed advanced pancreas adenocarcinoma. * Tumor progression after at least one line of chemotherapy. * Genetic or molecular test confirmed the presence of homologous recombination deficiency. * Presence of at least of one measurable lesion in agreement to RECIST criteria. * The expected survival ≥ 3 months. * Adequate organ performance based on laboratory blood tests. * Women of childbearing potential and men must agree to use adequate contraception prior to study entry and for the duration of study participation. Exclusion Criteria: * Pregnant or nursing women. * Primary pancreatic cancer. * Patients who have received platinum or PARPi treatment. * The diagnosis was confirmed by pathology as non-adenocarcinoma of pancreas. * Inflammation of the digestive tract, including pancreatitis, cholecystitis, cholangitis, etc. * Severe and uncontrollable accompanying diseases that may affect protocol compliance or interfere with the interpretation of results. * Renal insufficiency or dialysis * Other serious accompanying illnesses, which, in the researcher's opinion, could seriously adversely affect the safety of the treatment. * Patients who are allergic to cisplatin or other platinum drugs. * Patients who are unwilling or unable to comply with study procedures.