Objective To investigate the clinical manifestation and radiological features of unknownetiology ostearthritic disease in Shigeng village of Chongzhou city in Sichuan province so as to lay a basis for further study. Methods The data were analyzed retrospectively. The epidemiology investigation, physical examination, movement functional assessment, lab test and X-ray examination were performed on 116 villagers of 3 years and more than. Quantitative analysis on roentgenography was conducted. Results Sixty-four villagers had unknown ostearthritic disease，the prevalence was 55.2%；17 patients were limp, the prevalence of limp was 26.6%，onset age mainly focused under 40 years. Main manifestation of osteoarthritic disease was fixed pain of knee joint or hip joint, and bilateral pain was significantly more than single pain, but local fever and swelling were not obvious. Mild or moderate pain account for 73.5% of patients, and pain was aggravated after physical labor or movement and could be relieved after rest. Joint pain had no influence on joint movement function for long time, leading to a limp due to the joint functional disorders at late stage. Physical examination illustrated the flexion contracture of the hip and limitation of internal and external rotation. The Harris scores were 86.5±17.1(left hip) and 86.3±17.2. 46 (right hip), and the excellent or good result was achieved in 46 patients, fair and poor results in 18 patients. The average HSS scores were 88.4±9.3(left knee) and 88.2±11.0(right knee). The excellent or good result was achieved in 61 patients, fair and poor results in 3 patients. The X-ray films showed degenerative disorders of hip joint such as narrowing of the joint space (47.6%)，articular surface sclerosis and deformation (30.2%), shallow and increased density acetabulum, increased obliquity and insuffi cient coverage of the femoral head by the acetabulum, and increased femoral neck-shaft angles. Radiological features of knee joint were bony spur or bony bridge，osteoporosis，incomplete and thickening articular surface with sclerosis and deformation，degenerative disorders. Conclusion Main clinical manifestation of unknown osteoarthritic disease in Chongzhou city was fixed pain of bilateral knee joint or combined with hip joint pain at early stage，and functional limitation in hip joint at late stage. Main radiological feature was hip joint degeneration. To effectively control the osteoarthritic disease ofthis area, much more etiology researches should be done.

Citation： YING Guiying,JIA Yong,SONG Bin,et al.. CLINICAL MANIFESTATION AND QUANTITATIVE ANALYSIS ON ROENTGENOGRAPHY OF UNKNOWNETIOLOGY OSTEOARTHRITIC DISEASE IN CHONGZHOU CITY OF SICHUAN PROVINCE. Chinese Journal of Reparative and Reconstructive Surgery, 2007, 21(3): 289-294. doi: Copy