Abstract
The normal values of the radiological lines most frequently used as references in the diagnosis of adult protrusio acetabuli were prospectively determined in 150 children (300 hips) without femoral pathology and aged between 2 and 15 years, mean age 8 years. The teardrop shape was modified according to the child's age, the “crossed” type predominating (48.7%). The mean centre edge (CE) angle fluctuated, with a median value of 31.2°±6.2°, increasing with age and with slightly greater values in females; a large spread of CE angle values was observed within age groups. Acetabular ilioischial line values ranged from +7 to -5 mm, with a mean of +1.8±2 mm. This last method was the most suitable because it was not modified by changes in incidence of X-rays in radiological studies. With this method protrusio is diagnosed in children when the acetabular line is projected medially, provided that the ilioischial line is 1 or 3 mm or more for boys and girls, respectively. We conclude that the most trustworthy method available to evaluate PA in children should be “line crossing”.
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References
Ansell BM, Umlu M (1970) Hip involvement in juvenile chronic polyarthritis. Ann Rheum Dis 29:687
Armbuster TG, Guerra J, Resnick D, Goergen TG, Feingold ML, Niwayama G, Danzing LA (1978) The adult hip: ananatomic study. I. The bony landmarks. Radiology 128:1
Bible MW, Pinals GMA, Palmieri JA, Pitcock JA (1983) Protrusio acetabuli in osteoporosis and osteomalacia. Clin Exp Rheumatol 1:323
Bolton-Maggs BG, Crabtree SD (1983) The opposite hip in congenital dislocation of the hip. J Bone Joint Surg [Br] 65:279
Catterall A (1984) What is congenital dislocation of the hip? J Bone Joint Surg [Br] 66:469
Dwosh IL, Resnick D, Becker MA (1976) Hip involvement in ankylosing spondylitis. Arthritis Rheum 19:683
Friedenberg ZB (1963) Protrusio acetabuli in childhood. J Bone Joint Surg [Am] 45:373
Guyer PB, Dewburn KC (1978) The hip joint in Paget's disease (Paget's “coxopathy”) Br J Radiol 51:574
Hasting DE, Parker SM (1975) Protrusio acetabuli in rheumatoid arthritis. Clin Orthop 108:76
Hooper JC, Jones EW (1971) Primary protrusion of the acetabulum. J Bone Joint Surg [Br] 53:23
Jacqueline F, Boujot A, Canet L (1961) Involvement of the hips in juvenile rheumatoid arthritis. Arthritis Rheum 4:500
Martinez S, Apple JS, Barber C, Putman ChE, Rosse WF (1984) Protrusio acetabuli in sickle cell anemia. Radiology 151:43
Pomeranz MM (1932) Intrapelvic protrusion of the acetabulum (Otto pelvis). J Bone Joint Surg 14:663
Resnick D (1975) Patterns of migration of the femoral head in osteoarthritis of the hip. AJR 124:62
Shore A, Macanely D, Ansell BM (1981) Idiopathic protrusio acetabuli in juveniles. Rheum Rehabilitation 20:1
Tönnis D (1976) Normal values of the hip joint for evaluation of X-rays in children and adults. Clin Orthop 119:39
Weintroub S, Green I, Terdiman R, Weissman SL (1979) Growth and development of congenitally dislocated hips reduced in early infancy. J Bone Joint Surg [Am] 61125
Wenger DR, Dikoff TS, Herring JA, Mauldin DM (1980) Protrusio acetabuli in Marfan's syndrome. Clin Orthop 147:134
Wiberg G (1939) Studies on dysplastic acetabula and congenital subluxation of the hip joint with special reference to the complication of osteoarthritis. Acta Chirurgica Scand 83 [Suppl 58]:28
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Gusis, S.E., Babini, J.C., Garay, S.M. et al. Evaluation of the measurement methods for protrusio acetabuli in normal children. Skeletal Radiol. 19, 279–282 (1990). https://doi.org/10.1007/BF00191672
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DOI: https://doi.org/10.1007/BF00191672