PET / CT examination using [18F] FAPI-74 is performed on patients diagnosed with malignant tumor, and the pathological condition is determined by comparing with FDG-PET/CT examination of conventional diagnostic imaging.

Cancer stroma accounts for more than 90% of all tumors, and cancer-related fibroblasts (CAFs) play an important role in the growth and progression of cancer. FAP expressed in CAF has been found to be expressed in many cancers, and [68Ga] FAPI-04 and [18F] FAPI-74, which are PET diagnostic agents for FAP ligand FAPI, have been used all over the world. The purpose of this study is to perform PET / CT using [18F] FAPI-74 injection for patients diagnosed with malignant tumors, mainly pancreatic cancer and gastric cancer to evaluate the pathology in detail by comparing with the FDG-PET/CT.

Inclusion Criteria:

Patients who meet any of the following conditions.

1. Patients who have been diagnosed with malignant tumors or suspected of having malignant tumors and have CT or FDG-PET examination.
2. Patients who have been diagnosed with malignant tumor and are scheduled to receive or have undergone anticancer treatment such as chemotherapy or radiation therapy.
3. Patients suspected of recurrence by clinical findings or diagnostic imaging such as CT or FDG-PET after treatment of malignant tumor

Exclusion Criteria:

1. Pregnant women or patients who may be pregnant
2. Pediatric patients requiring sedation
3. Those who are judged to be inappropriate as subjects.