Neoplastic growths are classified into two main categories: benign and malignant. Benign neoplasms are non-cancerous growths that typically grow slowly and do not spread to other parts of the body. They can often be removed surgically and generally have a good prognosis. In contrast, malignant neoplasms are cancerous, can grow rapidly, invade surrounding tissues, and metastasize, making them more challenging to treat.