Primitive Neuroectodermal Tumor (PNET) is a type of cancer that primarily affects the brain and spinal cord. It arises from primitive nerve cells and is most commonly found in children and young adults. PNETs are classified as small round blue cell tumors and can be aggressive, requiring prompt diagnosis and treatment. Treatment for PNET typically involves a combination of surgery, radiation therapy, and chemotherapy. The prognosis varies depending on factors such as the tumor's location, size, and the age of the patient. Early detection and intervention are crucial for improving outcomes in individuals diagnosed with PNET.