LAB VALUES IN BONE DISORDERS

	Serum Ca	Phosphate	ALP	PTH	Comments
Osteoporosis	Normal	Normal	Normal	Normal	↓ bone mass
Osteopetrosis	Normal	Normal	Normal	Normal	Thickened, dense bone
Osteomalacia/rickets	↓	↓	Normal	↑	Soft bones
Osteitis fibrosa cystica	↑	↓	↑	↑	“Brown tumors”
Paget’s disease	Normal	Normal	↑	Normal	Abnormal bone architecture