Neoplastic tissues are broadly classified into two categories: benign and malignant. - Benign neoplasms: These are non-cancerous growths that generally grow slowly and remain localized. They typically have well-differentiated cells that closely resemble the tissue of origin. - Malignant neoplasms: These are cancerous growths characterized by rapid, uncontrolled proliferation and the ability to invade neighboring tissues and metastasize to distant sites. Malignant cells often exhibit significant atypia and loss of differentiation.
