The<unk>  occurs with an estimated frequency of 1%–9.8% of patients following anterior cruciate ligament reconstruction. Although the precise cause is unknown, it is believed that uplifting of fibrocartilaginous tissue during drilling of the tibia for anterior cruciate ligament reconstruction serves as a nidus for fibrous tissue deposition. Pathologically, the lesion consists of central granulation tissue surrounded by dense fibrous tissue. The lesion was so named because of its bulbous appearance and characteristic focal areas of reddish-blue discoloration (from venous channels) that resemble an eye at arthroscopy. The lesion may result in loss of full extension and surgical débridement of the lesion results in restoration of full knee extension.
Cyclops lesion
Janeway lesions
Papulosquamous lesions
Prosector's wart
Crazy paving sign
Sunsetting sign
Fat halo sign
Bitot's spots