Hyperparathyroidism can affect which of the following organs and body systems?

A. Gastrointestinal tract.

B. Kidneys.

C. Skeleton.

D. Neuromuscular system.

E. Cardiovascular system.

DISCUSSION: Gastrointestinal involvement includes pancreatitis and peptic ulcer disease. The kidneys can be affected by nephrocalcinosis or nephrolithiasis. The bones can be severely affected by bone resorption. Neuromuscular complaints can include weakness and fatigue. Hypertension is present in as many as 70% of people with hyperparathyroidism and may be related to the renal disease.