pituitary stalk section

pi·tu·i·tar·y stalk sec·tion

transection of the neurovascular connection between the hypothalamus and the pituitary gland.
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It has been suggested that the level of the pituitary stalk section is the major determinant of permanent DI: the closer the lesion to the magnocellular cell bodies in the hypothalamus, the more likely that the hypothalamic cell bodies will degenerate, resulting in permanent DI.

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