Fig. 4From: A characteristic MRI finding to diagnose a partial tear of the medial meniscus posterior root: an ocarina signA “bridged” unstable root tear (type B) of the MM posterior root (61-year-old man). A A posterior root irregularity (dashed area, coronal view). B An ocarina sign (T2* sagittal view). C, D Arthroscopic findings from the anterolateral portal. An unstable tear (≥ 1/2 of root width) with connective tissue coverage (arrowhead)Back to article page