Absent pituitary stalk 2023-07-16T12:39:21Z A developmental defect characterized by failure to develop of the pituitary stalk. The pituitary stalk, also known as the infundibulum or infundibular stalk, is the connection between the hypothalamus and the pituitary gland. See Figure 1 and 2 of PMID:25250085. Abnormal pituitary stalk morphology