The Journal of Bone and Joint Surgery, Vol 67, Issue 9 1376-1383, Copyright © 1985 by Journal of Bone and Joint Surgery, Inc
Diseases of the hip. A comparative study of Japanese Oriental and American white patients
FT Hoaglund, R Shiba, AH Newberg and KY Leung
Pelvic radiographs of 200 consecutive Japanese Oriental patients who were
admitted for hip surgery at the Hospital of Kobe University in Japan were
compared with those of 199 consecutive American white patients who were
admitted for the same purpose to a New England hospital over a similar four
and a half-year period between 1972 and 1976. One hundred and fifty-three
Japanese Oriental and 157 American white patients had either primary or
secondary osteoarthritis. The remainder had other types of hip pathology,
such as avascular necrosis, rheumatoid arthritis, and ankylosing
spondylitis. The radiographs of five Japanese Oriental and seven American
white patients showed evidence of previous Legg-Calve-Perthes disease, coxa
vara, or slipped capital femoral epiphysis. With only two exceptions, the
osteoarthritis in the remainder of the Japanese Oriental patients was
secondary, caused by antecedent congenital hip disease: twenty-eight had
one or two congenitally dislocated hips, ninety-two had acetabular
dysplasia, and twenty-six had superolateral osteoarthritis. In contrast,
only nine of the American white patients clearly had a diagnosis of
acetabular dysplasia, and twenty-six had superolateral osteoarthritis.
Twenty-one American white men had a femoral head-tilt deformity. Among the
Americans, the largest group (sixty-five patients) had superomedial
osteoarthritis. Nine had non-rheumatoid protrusio acetabuli and twenty had
axillary or concentric osteoarthritic involvement. The majority of American
white patients, therefore, had a type of osteoarthritis that was not seen
in the Japanese Oriental patients.(ABSTRACT TRUNCATED AT 250 WORDS)
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