This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal system, Subject name: Radiology
Which of the following is not a cause of generalized increase in bone density in adults ? 
Select and explain. 
A. Myelosclerosis, B. Renal osteodystrophy, C. Fluorosis, D. Caffey's disease
D: Caffey's disease
Answer: D: Caffey's disease 
Explanation: Caffey's disease is also known as infantile coical hyperostosis It is self limiting disorder occuring only in infants. Single layered or laminated periosteal reaction, subperiosteal dense coical hyperostosis involving only the diaphysis of long bones is characteristic radiological picture of Caffey's disease.