Fig. 3From: Ankylosing spondylitis impact on knee cartilage thickness: correlation with demographic data and clinical characteristicsB-mode ultrasound transverse scan of the anterior knee joint in male patient aged 29 years showing thickness of femoral cartilage at a lateral condyle = 2.4 mm, b intercondylar area = 3.4 mm, and c medial condyle = 1.8 mmBack to article page