He was started on levothyroxine because his blood tests after surgery revealed hypopituitarism: thyroid-stimulating hormone (TSH) 0.08 uUI/mL, Free T4 1.23 ng/dL (0.7–1.48), free testosterone 1.47 pg/mL (7.20–23), plasma cortisol 0.80 μg/dL, and adrenocorticotropic hormone (ACTH) < 1.0 ng/dL. This evidence concerns the gene POMC and hypopituitarism.