Anterior cruciate ligament injury may involve a complete or partial tear within the substance tear of the ligament or an avulsion from the bone.
Intrasubstance Anterior Cruciate Ligament Injuries in the Pediatric Population. Aylyarov A, Tretiakov M, Walker SE, Scott CB, Hesham K and Maheshwari AV. Indian J Orthop. 2018 Sep-Oct; 52(5): 513–521.
Unique simultaneous avulsion fracture of both the proximal and distal insertion sites of the anterior cruciate ligament. Samuelsson K,Svantesson E, Senorski EH and Östman B. BMJ Case Rep. 2018; 2018: bcr2017222265.