Which of the following type of malignancy is associated with the characteristic Zellballen pattern on histopathology?: (A) GIST, (B) Astrocytoma, (C) Carotid body tumor, (D) Retinoblastoma
Answer is C. Zellballen pattern refers to the nest-like clusters of uniform, round-to-polygonal chief cells surrounded by delicate richly vascular tissue and sustentacular cells. This histological pattern is a characteristic feature of carotid body paraganglioma.