Which of the following is not a cause of the generalized increase in bone density in adults?

Caffey's disease (Infantile cortical hyperplasia) causes a generalized increase in bone density in children. Causes of a generalized increase in bone density in adults:- Myeloproliferative disorders, myelosclerosis, renal osteodystrophy, poisoning (lead), fluorosis, osteoblastic metastasis, lymphoma, mastocytosis, Paget's disease, Metabolic (Hypercalcemia), and idiopathic.