hypophysial diverticulum

pi·tu·i·tar·y di·ver·tic·u·lum

a tubular outgrowth of ectoderm from the stomodeum of the embryo; it grows dorsad to the infundibular process of the diencephalon, around which it forms a cuplike mass, giving rise to the pars distalis and pars juxtaneuralis of the hypophysis.
Farlex Partner Medical Dictionary © Farlex 2012

hy·po·phy·si·al di·ver·tic·u·lum

(hī'pō-fiz'ē-ăl dī'vĕr-tik'yū-lŭm)
An upgrowth from the ectodermal roof of the stomodeum of the embryo that is adjacent to the floor of the diencephalon; it forms the adenohypophysis (glandular segment of the pituitary gland).
Synonym(s): adenohypophysial pouch, pituitary diverticulum, Rathke pocket, Rathke pouch.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012