Forty-two cases of L-C-P disease which visited Chonnam University Hospital during the past 4 years and 8 months from January 1974 to August 1978 were radiologically evaluated. The results were as follows; 1. Sex incidence revealed male predominance with male to female ratio about 6 : 1. 2. The distribution of affected side showed 59.5% in right, 38.1% in left, 2.4% in both. 3. Six to nine years old group was most commonly affected (15 cases, 35.7%), and 30 cases (71.4%) were in 3 to 15 years old group. 4. When visiting hospital, the stage of disease was most commonly noted in avascular stage (22 cases), and the duration of disease was most common below 4 months (22 cases). 5. T.D.D. was measured in 42 cases irrelevalent to stage of disease, and ranged about 5-12mm in normal jip joints, and there was largely about 2mm wider than normal ones in affected hip joint.