A 45-year-old man complains of burning epigastric pain that wakes him up at night. The pain is relieved by eating or using over-thecounter antacids and H2 blockers. Diagnosis is best confirmed by which of the following?
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 within the sella turcica. Which of the following additional complications is she most likely to have?