A child undergone bilateral adrenalectom, later he developed headache, visual field defect, Hyper pigmentation of skin,what is the most probable diagnosis?
Nelsom syndrome : 
It is complication after bilateral adrenalectomy due to rapid enlargement of pre - existing ACTH producing adenoma with above clinical features.
Pitutary adenoma
Allgrove syndrome
Wolman  syndrome
Nelson  syndrome