In 21 patients (25 torn menisci), we retrospectively examined abnormal intensity area around the torn site using Magnetic Resonance Imaging (MRI) and correlated with histrogical findings. Abnormal high or iso intensity changes were revealed in 21 of 25 torn menisci by MRI. Hitologic abnormalities (e. g. mucoid degeneration and cleavage of collagen bundles) correlated well with these intensity changes on MRI.
