Benign neoplasms are non-cancerous growths that arise from various types of tissues in the body. Unlike malignant tumors, benign neoplasms do not invade surrounding tissues or metastasize to other parts of the body, which generally makes them less harmful. They can, however, cause complications depending on their size, location, and the organs they affect. Common types of benign neoplasms include lipomas, adenomas, and fibromas.