Neuroendocrine neoplasms (NENs) are a group of tumors that arise from neuroendocrine cells, which are specialized cells that produce hormones and neurotransmitters. These tumors can occur in various parts of the body, including the lungs, pancreas, and gastrointestinal tract. NENs can be benign or malignant and may grow slowly or rapidly, depending on their type and location. Diagnosis of neuroendocrine neoplasms often involves imaging tests, blood tests, and biopsies. Treatment options may include surgery, radiation therapy, and targeted therapies to manage symptoms and control tumor growth. Early detection is crucial for improving outcomes and quality of life for patients.