Fig. 1.

MRI and arthroscopic images of an 18-year-old male (patient 1) who presented with left knee pain and locking. (a) Coronal T2-weighted image showing meniscus tear with degeneration of the white–white zone. (b) Coronal T2-weighted image showing horizontal tear with cyst formation in the posterior horn of the medial meniscus. (c) The complex torn meniscus was partially resected. (d) Arthroscopic image obtained 4 years after partial meniscectomy showing a re-tear of the remaining medial meniscus extending from the body to the posterior horn.