The level of which one of the following hormones is likely to increase after hypothalamic ablation ?: (A) Growth hormone, (B) Prolactin, (C) FSH, (D) ACTH
Answer is B. Lesions of hypothalamic pituitary region that disrupts lactotrope response associated with hyperprolactinemia. radiation- induced damage cause elevated PRL levels , usually in the range of 30-100 microgram / litre ( Harrison 17 pg 2205)