Hyperparathyroidism that is associated with malabsorption syndromes is which type?

Hyperparathyroidism that is associated with malabsorption syndromes is which type?

• A. Primary
• B. Secondary
• C. Tertiary
• D. Hypoparathyroidism

Answer: (B)

Malabsorption lowers the absorption of calcium and fat-soluble vitamin D, leading to reduced serum calcium. The parathyroid glands respond to this hypocalcemia by increasing PTH secretion to raise calcium levels. Because the underlying issue is not a primary parathyroid defect but a separate condition causing low calcium, this pattern is called secondary hyperparathyroidism. By contrast, primary hyperparathyroidism comes from a parathyroid gland problem (like an adenoma) that raises calcium and PTH; tertiary hyperparathyroidism occurs after long-standing secondary disease when the glands become autonomous and keep secreting PTH even if calcium normalizes; hypoparathyroidism is characterized by low PTH and low calcium.

Malabsorption lowers the absorption of calcium and fat-soluble vitamin D, leading to reduced serum calcium. The parathyroid glands respond to this hypocalcemia by increasing PTH secretion to raise calcium levels. Because the underlying issue is not a primary parathyroid defect but a separate condition causing low calcium, this pattern is called secondary hyperparathyroidism. By contrast, primary hyperparathyroidism comes from a parathyroid gland problem (like an adenoma) that raises calcium and PTH; tertiary hyperparathyroidism occurs after long-standing secondary disease when the glands become autonomous and keep secreting PTH even if calcium normalizes; hypoparathyroidism is characterized by low PTH and low calcium.