Fig. 2

Histopathologic examination of ELST. a Histologic sections revealed a papillary architecture and scattered follicular structures (Hematoxylin-eosin, × 100). b The papillary structures were lined by a single layer offlattenedcuboidal-to-columnar cells. There were mild cellular pleomorphism and rare mitotic activity (Hematoxylin-eosin, × 400)