There are multiple definitions:
posterior superior iliac spine(English)
Pituitary Stalk Interruption Syndrome(English)
- characterized by absence or marked thinning of the pituitary stalk, nonidentification of the normal posterior bright spot of the neurohypophysis, the presence of the bright spot in the floor of the third ventricle in the region of the median eminence or along the infundibulum (ectopic posterior pituitary), and commonly small size of the adenohypophysis. Isolated growth hormone deficiency or multiple pituitary hormone deficiencies occur. Mutations of HESX1, LHX4, OTX2, and SOX3 genes have been occasionally implicated. The severity of abnormality of the stalk (absence versus thinning) correlates with the severity and multiplicity of hormone deficiencies
- Hormone, Pituitary (gland)
- https://doi.org…53486-6.00063-6