Possibly. When the pituitary gland doesn't work, anything can happen.
The pituitary gland
There is no known prevention of hypopituitarism, except for prevention of damage to the pituitary/hypothalamic area from injury.
There are many known individuals that have been diagnosed with the issue of "Hypopituitarism." This condition is very likely to run in family circles.
yes...
Hypopituitarism
Yes. The movie "Orphan" (2009).
Yes. It's different for everybody.
There are a number of potential symptoms for hyperpigmentation. Some of these symptoms include birthmarks, darkening of the skin especially around the birthmarks.
It's a rare condition, and the cause it not yet known.
You would have to take special medications under a doctor's supervision.
Fixed drug reaction.
There are so many benign causes for hyperpigmentation that it's hard to imagine a situation in which skin coloration would cause a failure of a medical exam.