New scan could spot hidden cancers better than current methods

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: * Histologically confirmed pancreatic ductal adenocarcinoma (PDAC), cholangiocarcinoma, hepatocellular carcinoma (HCC), gastric cancer, bladder cancer, ovarian cancer, pheochromocytoma/paraganglioma (PPGL), small cell lung cancer (SCLC) or extrapulmonary neuroendocrine cancer (EP-NEC), mesothelioma or sarcoma. * Participants must be scheduled or intended to receive treatment for their cancer. * Evaluable disease * \>= 18 years old. * Eastern Cooperative Oncology Group (ECOG) performance score \<= 2. * Individuals of child-bearing potential (IOCBP) and individuals that can father children must agree to use effective contraception (barrier, hormonal, intrauterine device (IUD), surgical sterilization, abstinence) at the study entry and for 2 months after each (18F) FAPI-74 imaging. Sperm may not be frozen or donated within the same period. * Must be willing to discontinue breastfeeding for 2 months after each study imaging. * The ability of participant to understand and the willingness to sign a written informed consent document. EXCLUSION CRITERIA: * History of allergic reactions attributed to compounds of similar chemical or biologic composition to \[18F\]FAPI-74 or other agents used in the study. * History of severe claustrophobia unresponsive to oral anxiolytics or history of any other condition preventing the ability to lie on the imaging scanner for up to 45 minutes. * Weight \> 350 lbs., or inability to fit within the imaging gantry. * Positive Beta-human chorionic gonadotropin (Beta-HCG) serum or urine pregnancy test performed in IOCBP at screening. * Uncontrolled intercurrent illness, or medical condition(s) including but not limited to renal failure, liver failure, or psychiatric illness/social situations evaluated by medical history and physical exam that would limit compliance with study requirements and potentially increase risk for the participant. * Serum creatinine \> 2 times the upper limit of normal. * Liver transaminases (ALT, AST) greater than 3 times the upper limit of normal.