Avitaminosis [Disease/Finding] Vitamin D Deficiency [Disease/Finding] 1024200 A nutritional condition produced by a deficiency of VITAMIN D in the diet, insufficient production of vitamin D in the skin, inadequate absorption of vitamin D from the diet, or abnormal conversion of vitamin D to its bioactive metabolites. It is manifested clinically as RICKETS in children and OSTEOMALACIA in adults. (From Cecil Textbook of Medicine, 19th ed, p1406) C6446 C0042870 M0022798 Vitamin D Deficiency N0000003134 Vitamin D Deficiency D014808 34713006 Deficiency, Vitamin D