Fig. 1

Selected sample MRI studies which demonstrate the typical peduncle and cartilage lesions. a, b- Different sample cases, axial images; notice the peduncle (yellow arrow) of the cyst adherent to posterior capsule. c- Coronal T2 weighted image that shows cyst (yellow arrow) located near the gastrocnemius medial head. d. Axial image that shows intracystic loose bodies (yellow arrow), originated from trochlear fissure that moved through the valve and trapped, a typical case that demonstrate the loose bodies in the cyst and effusion. e. The same case with figure d, The arrow (red) shows trochlear cartilage fissure that generate chondral debris. f g. Different sample cases, axial images; notice the cyst (yellow arrow) adherent to posterior capsule