Basem Dahshan, MD Basem Dahshan, MD, is a radiation oncologist with AHN Cancer Institute. He has expertise in bladder cancer, brain tumors, breast cancer, colorectal cancer, esophageal cancer, gastrointestinal cancer, gynecological cancer, head and neck cancer, liver cancer, metastatic cancer, pancreatic cancer, prostate cancer, skin cancer, and neurological cancer. Dr. Dahshan is skilled at performing radiosurgery (SRS) and stereotactic body radiotherapy (SBRT). He went to medical school at Marshall University School of Medicine in Huntington, West Virginia and West Virginia University School of Medicine in Morgantown, West Virginia. Dr. Dahshan is affiliated the American Society for Therapeutic Radiation Oncology. He welcomes patients ages 18 and older.