镜下，颗粒细胞瘤趋向于形成类似于原始的滤泡的结构，如图左示。大多数在组织学上呈良性，但一些是恶性的。
Microscopically, the granulosa cell tumor attempts to form structures that resemble primitive follicles, as seen at the left. Most of these tumors are histologically benign, but some are malignant.
