A Rare Case of Endolymphatic Sac Tumour: Clinicopathologic Study and Surgical Management
Figure 4
Histopathologic study of ELST. The histologic sections showed the papillary and glandular-cystic architecture of the ELST (a) (H&E, 50x). There were cystic glandular spaces filled with colloid-like material which was remarkably similar to thyroid tissue (H&E, 200x) (b). The papillary structures were lined by a single layer of low cuboidal epithelial cells. There were minimal cellular pleomorphism and rare mitotic activity (H&E, 200x) (c).
