Which type of tumor remains distinct in appearance and is noninvasive?

A benign neoplasm is distinct in appearance and characterized by its noninvasive nature. These tumors typically remain localized to their site of origin, which means they do not invade surrounding tissues or metastasize to distant sites in the body. Their well-defined borders and encapsulated structure contribute to their distinct appearance, allowing for easier identification during medical assessments, such as imaging or biopsy.

In contrast, malignant neoplasms, such as carcinomas, are characterized by uncontrolled growth and the potential to invade nearby tissues and spread to other parts of the body. Neuroblastomas, which arise from neural crest cells, are a specific type of malignant tumor typically found in children and can also invade surrounding tissues and metastasize. This highlights the differences in behavior and characteristics between benign and malignant tumors, making benign neoplasms the appropriate choice for this question.