. Journal of radiology . Fig. 6. (July, 1920) takenseven years later, shows the terminalstage as a flattening and spreading ofthe epiphysis which is displaced slightlyin all directions on the neck. The jointsurfaces are smooth and not involved. Conclusions Osteochondral tvophopathy of thehip-joint, Leggs disease, Calves dis-ease, Perthes disease, etc., is a definiteclinical entity, which should not be con-fused with other diseases of the hip-joint. If Leggs disease occurs in otherjoints than the hip, it has not yet beenrecognized as such. A number of conditions may beresponsible for the diseas


. Journal of radiology . Fig. 6. (July, 1920) takenseven years later, shows the terminalstage as a flattening and spreading ofthe epiphysis which is displaced slightlyin all directions on the neck. The jointsurfaces are smooth and not involved. Conclusions Osteochondral tvophopathy of thehip-joint, Leggs disease, Calves dis-ease, Perthes disease, etc., is a definiteclinical entity, which should not be con-fused with other diseases of the hip-joint. If Leggs disease occurs in otherjoints than the hip, it has not yet beenrecognized as such. A number of conditions may beresponsible for the disease, but it isgenerally conceded that sixty-five toseventy per cent of the cases follow aninjury. It occurs between the ages of fiveand ten, with an extreme range of twoand one-half to twelve. The course, symptoms, radiogramsand end results are characteristic ofthis affection. The treatment is simple and theprognosis good. The disease is self limited and tendstoward spontaneous cure. Figure VIII.—A case of Leggs A STUDY OF LEGGS DISEASE—GILES In conclusion, I wish to express myappreciation to Drs. J. M. Martin andC. L. Martin of Dallas, Texas, fortheir aid and instruction in the prepara-tion of this paper. Bibliography (1) Legg, Arthur T., An ObscureAffection of the Hip-joint, Boston S. J., Feb. 17, 1910. Osteochon-dral Trophopathy of the Hip-joint,Surg. Gynec. and Obst., 22:307,1916. (2) Calve, Jaques, A ParticularForm of Pseudocoxalgia, Rev. deChir., 62:154, 1910. (3) Perthes, Geo., OsteoarthritisDeformans Juvenilis, DeutscheZtschr. f. Chir., 1910, Leipzig. Osteo-chondritis Deformans Juvenilis, Arch,f. klin. Chir., 1913, p. 777. (4) Taylor, H. L., Quiet HipDisease, Surg. Gynec. Obst., 22:158,Feb., 1916. (5) Schwartz. Erwin, Zur Frageder spontanen Epiphysenloesung (in-tracapsularen Schenkelhalsfraktur) imKindersalter. Beitr. z. klin. Chir. 1913. (6) Osteoarthritis DeformansCoxae Tuvenilis, Deutsche Ztschr. 117:148, 1912. (7) Kidner, F. C, Etiology and


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