Bone disorders

Question 1

Low calcium, low phosphate, normal PTH, normal ALP

Answer 1

Osteomalacia

Question 2

Isolated raised ALP

Answer 2

Paget’s

Question 3

Low calcium, raised phosphate, raised PTH, raised ALP

Answer 3

CKD

Question 4

Raised PTH, raised calcium, low phosphate

Answer 4

Primary hyperparathyroidism

Question 5

Raised PTH, low/normal calcium, raised phosphate, low vit D

Answer 5

Secondary hyperparathyroidism (likely chronic renal failure)

Question 6

Raised PTH, raised/normal calcium, raised ATP, low/normal phosphate

Answer 6

Tertiary hyperparathyroidism (hyperplasia of gland after correction of renal disorder)