This Phase I, open-label study aims to study to absolute bioavailability of Saruparib (AZD5305) and the absorption, distribution, metabolism and excretion (ADME) of \[14C\]-Saruparib in patients with advanced solid malignancies. This will be done on an inpatient basis in 2 parts (single-dose oral administration with radiolabeled microtracer in Part A, single-dose IV radiolabeled administration in Part B) during which samples will be obtained of plasma, urine, feces and vomitus (where applicable).