Correlation Between Chondromalacia Patella and Subcutaneous Knee Fat Thickness: A Study With Magnetic Resonanve Imaging

Abstract

Amaç: Bu çalışmadaki amacımız obezitenin göstergesi olan prepatellar subkutan yağ kalınlığı (PSYK) ile kondromalazik patellanın (KP) varlığı ve şiddeti arasındaki ilişkiyi belirlemektir. Gereç-Yöntem: Retrospektif olan bu çalışmaya 9 aylık dönemde çeşitli nedenlerle diz manyetik rezonans görüntüleme (MRG ) yapılan ve kritelere uyan 175 hasta dahil edildi. Çekimler 1.5 T MRG cihazında ekstremite koili kullanılarak yapıldı. KP değerlendirmesi için aksiyal kesitler kullanıldı ve grade 0 ( normal) ile grade 3 (komplet kartilaj kaybı) arasında derecelendirildi. PSYK ölçümünde ise sagittal kesitler kullanıldı. Bulgular: KP 25 olguda grade 1 (%33,33), 25 olguda grade 2 (%33,33) ve 25 olguda grade 3 (%33,33) olmak üzere 75 hastada (%42.8) saptandı. KP grubunda PSYK normal gruba göre yüksekti (P<.001). KP'nın grade ile PSYK arasında pozitif korelasyon gösterildi ( R=0,47 [95% confidence interval,1,20-2,12] p<.001 ). Subkutanöz prepatellar yağ dokusu kadınlarda belirgin kalındı ( P<.001). Sonuç: Obezitenin göstergesi olan PSYK ile KP 'nın varlığı ve şiddeti arasında pozitif ilişki mevcuttur.

Association between the subcutaneous fat thickness of the knee and chondromalacia patella: a magnetic resonance imaging-based study

“…The authors reported that PSFTT was higher in the CP group than in the control group, a positive correlation was found between PSFTT and CP (r = 0.47), and thicker SFTT was observed in women than men. 13 The results of the present study were very similar to both of these studies and underlined the main results. In addition, when compared with the results of previous studies, the PSFTT measurements in the present study indicated a stronger correlation between SFTT and the CP grade.…”

“…Women had higher SFTT values than men. 14 Duran et al 13 studied 175 patients and measured PSFTT to identify any relationship with CP. The authors reported that PSFTT was higher in the CP group than in the control group, a positive correlation was found between PSFTT and CP (r ¼ 0.47), and thicker SFTT was observed in women than men.…”

“…The prepatellar SFTT (PSFTT) was measured using mid-sagittal T1-weighted images from the mid-level of the patella, similar to the technique used in a previous study. 13 The medial SFTT (MSFTT) was measured using axial T2-weighted images. Using a modification of the method reported by Kok et al., 14 the measurements were performed at the cross-sectional level at which the maximum patellar cartilage was monitored on the image.…”

Association between the most superior point of patella-entrance of femoral trochlea distance ratio (SP-ET index) and chondromalacia patella: an investigation via magnetic resonance imaging

“…A modified Noyes classification was used to categorise the cartilage damage for the patients with CP, similarly as that used in knee MRI studies in the literature [ 13 , 14 ]. According to this method, grade 0 showed normal articular cartilage with homogenous signal intensity with an intact surface and thickness, grade 1 indicated a normal cartilage surface but focal abnormal signal intensity, grade 2 represented a defect less than 50% of the cartilage thickness (2A) or a cartilage defect more than 50% thickness but less than a full thickness (2B), and grade 3 specified a full cartilage thickness defect with exposed bone ( Figure 2 ).…”