Type B1 thymoma

WHO type B1 thymoma. The tumor is predominantly comprised of lymphocytes and shows a paler area with Hassall corpuscle-like elements (medullary island). Magnification, H&E x 40.

WHO: World Health Organization; H&E: hematoxylin and eosin.

Courtesy of Anja C Roden, MD.

Graphic 120979 Version 1.0