Perkin's line

Perkin's line is a line drawn on an AP radiograph of the pelvis perpendicular to Hilgenreiner's line at the lateral aspects of the triradiate cartilage of the acetabulum.[1][2]

Clinical use

Used in conjunction with Hilgenreiner's line, Perkin's line is useful in the diagnosis of developmental dysplasia of the hip; the upper femoral epiphysis should be in the inferomedial quadrant on a normal radiograph. Lateral displacement relative to Perkin's line is indicative of DDH.

References
  1. Noordin S, Umer M, Hafeez K, Nawaz H (September 2010). "Developmental dysplasia of the hip". Orthopedic Reviews. 2 (2): e19. doi:10.4081/or.2010.e19. PMC 3143976. PMID 21808709.
  2. Agarwal A, Gupta N (June 2012). "Risk factors and diagnosis of developmental dysplasia of hip in children". Journal of Clinical Orthopaedics and Trauma. 3 (1): 10–4. doi:10.1016/j.jcot.2011.11.001. PMC 3872792. PMID 25983450.


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