The accompanying case of osteopsathyrosis was treated and studied in the surgical outpatient department of the Children's Hospital, Boston. The accompanying series of roentgenograms gives a graphic fracture history of the patient from the time he was 9 months old until his death, at 7½ years.
In spite of the large number of cases reported in the literature, osteopsathyrosis, or fragilitas ossium, is a relatively uncommon cause of pathologic fractures. Griffith1 and Ostheimer2 had collected 193 cases in all up to 1913, and since then a few cases have been reported. In 1913 one case was reported by Schwarz and Bass,3 and another by Bamberg and Huldschinsky.4 In 1914 Bookman5 reported one, and the following year Kienböck6 collected thirty-seven cases from the literature (from 1888 to 1914) and added two cases of his own. Blaine7 reported one case in 1916, and, in 1917,