The history, general discussion and outstanding features of osteitis fibrosa cystica may be found in any system of medicine (1,2 He was at that time in fine physical condition, an active athlete, 6 feet 1 inch tall. His habits were good, his medical history uneventful and during his war service he was subjected at times to the nervous strain of navigating in the war zone. There were periods when his diet was low in calcium as he had almost no milk, eggs or green vegetables. In November 1918 when 22 years old, he slipped and felt a sharp, severe pain in his right loin which lasted one week. Three months later pains were felt in the legs and hips, which became more severe, and extended upward to the lumbar spine.

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