Both benign and malignant endocrine neoplasms demonstrate some degree of cellular pleomorphism, so it is not easy to tell benign from malignant on histologic grounds alone.

• 无论是良性内分泌肿瘤还是恶性内分泌肿瘤都显示一定程度的细胞异型性,因此仅从组织学上很难区分肿瘤的良恶性。