A 25-year-old woman has noted breast secretions for the past month. She is not breastfeeding and has never been pregnant. She has not menstruated for the past 5 months. Physical examination yields no abnormal findings. MRI of the brain shows a 0.7-cm mass in the adenohypophysis. Which of the following additional complications is most likely to be present in this patient?
A. Acromegaly
B. Cushing disease
C. Hyperthyroidism
D. Infertility
E. Syndrome of inappropriate antidiuretic hormone