A 17-year old woman was previously well presented with headaches, amonorrhea, and bitemporal hemianopsia. Her physical examination was otherwise unremarkable.
Labs are as follows:
- TSH — normal
- free T4 — normal
- 8 AM cortisol — normal
- LH — low
- FSH — low
- estradiol — 5000
- prolactin — 140 ug/L
What is the most likely diagnosis?
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