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Knee: C. B. Chang, I. Han, S. J. Kim, S. C. Seong, and T. K. Kim Association between radiological findings and symptoms at the patellofemoral joint in advanced knee osteoarthritis J Bone Joint Surg Br 2007; 89-B: 1324-1328 [Abstract] [Full text] [PDF]

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Association between radiology and symptoms at the PFJ in knee OA

Saeed Al-Naser   (31 October 2007)

Association between radiology and symptoms at the PFJ in knee OA 31 October 2007
Saeed Al-Naser, Senior House Officer Trauma & Orthopaedics Morriston Hospital, Swansea, UK Send letter to journal: Re: Association between radiology and symptoms at the PFJ in knee OA alnasersaeed{at}yahoo.co.uk Saeed Al-Naser	Sir, I read this article with great interest. There are some limitations of this study as mentioned by the authors. The non-homogenous groups of males and females introduce some bias to the study as we know that the relation between symptoms and radiological findings differ between sexes.1 Also, the sensitivity of the lateral views in diagnosing osteoarthritis in the patellofemoral joint is questionable and is not as accurate as axial views.2 In addition, the patellofemoral axial views are best taken in 30° of flexion as there is evidence that midflexion - which was done in this study - or hyperflexion can miss significant pathology of the patellofemoral joint.1 S. Al-Naser, Senior House Officer, Trauma & Orthopaedics, Morriston Hospital, Swansea, UK. 1. Davies AP, Vince AS, Shepstone L, Donell ST, Glasgow MM. The radiologic prevalence of patellofemoral osteoarthritis. Clin Orth Rel Res 2002;402:206-12. 2. Davies ap, Bayer J, Owen-Johnson S, et al. The optimum knee flexion angle for skyline radiography is thirty degrees. Clin Orth Rel Res 2004;423:166-71.