You got it right. Your smell sensation has to do with your pituitary removal. See an ENT specialist
for this and first see if the nerves carrying smell sensation and taste sensation have been affected. After that you will need to do full Pituitary Hormone profile like AM cortisol
, Sodium, potassium, FT4, FSH, LH, Prolactin
tests and see which direction they are heading to. This has to be shown to an Endocrinologist
and he/she will direct you further for the rest of the intervention to be taken.
I hope this helps you. Take care.