99mTc Labeled FAP Targeted Molecular Probe in Early Diagnosis of Tumors

This study tests a new radioactive imaging probe labeled with technetium (99mTc) that targets a protein called FAP (fibroblast activation protein), found in high amounts around many types of tumors. The study aims to see whether this new scan can detect tumors earlier and more accurately than existing imaging methods. **You may be eligible if...** - You are between 18 and 75 years old - An imaging test has found a suspected tumor - You are scheduled for surgery or a biopsy to confirm the diagnosis - Your kidney and liver function, blood counts, and other lab values meet the study requirements **You may NOT be eligible if...** - You have a known allergy to similar drugs or a history of severe allergic reactions - You have active hepatitis C, active hepatitis B, or another serious chronic infection - You have significantly impaired liver or kidney function - Your cancer makes up more than 50% of your body or is pressing on your spinal cord - Your expected survival is less than 6 months - You have received chemotherapy within the past 6 months - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.