Low testosterone

[tommyb9555]

My testosterone level was at 304 when first diagnosed .Began treatment with testim and 32 days later level was at 104.This was confirmed by 2 different labs.My FSH IS 1.82 AND MY lh is .60 yes so low not on the chart.My primary physician consulted with a endocrinologist and she said run am cortisol,prolactin,free t4,igf-1.After these come back they are suggesting MRI  of the pituitary gland. MY question is which of the last 4 tests would be the definer in if i should have an MRI or not and why.

[tommyb9555]

Why is no one other than estrelinha wanting to tackle this post?

[tommyb9555]

why would we do mri if cortisol,prolactin,free t4 and igf-1 are normal results.They want to do a MRI specifically on pituitary.I thought if levels were normal on cortisol,prolactin free t4 igf-1 there would be no need for mri.Am i right or wrong?

[estrelinha]

All those analyses can give information, the anterior lobe of the pituitary produces and releases (secretes) six main hormones: GH (measured by Igf-1), TSH (by free t4 can have an idea), ACTH (cortisol levels reflects that, because it's production is stimulated by ACTH), LH and FSH (LH is synthesized within the same pituitary cells as FSH and under the same stimulus (GnRH)) and prolactin. You should do the MRI if doctors thinks it's necessary.