The medulla of the thymus is the site of T Cell maturation.

Epithelial reticular cells (or epithelioreticular cells) are a structure in both the cortex and medulla of the thymus.

AIRE is a transcription factor expressed in the medulla of the thymus and controls the mechanism that prevents the immune system from attacking the body itself.

Two medical terms are named after Hassall: Hassall's corpuscles, which are spherical bodies in the medulla of the thymus gland, and Hassall-Henle bodies, which are abnormal growths in the Descemet membrane of the eye.