"Tibial tunnel cysts, including pretibial cysts, are occasional complications of autologous or synthetic anterior cruciate ligament (ACL) reconstruction surgeries. They are benign ganglion cysts that develop in or around the osseous tibial tunnel made during ACL reconstruction using the transtibial technique 1-2. They are not to be confused with ACL ganglion cysts."
"Tunnel cysts are divided into two broad categories 1-2:"
"MRI is the modality of choice for evaluating tibial tunnel and pretibial cysts. These cysts can appear uni- or multilocular and are typically hyperintense on fluid-sensitive sequences (fat-suppressed T2, PD, STIR). Reactive bone marrow oedema around the tunnel may also be present. They do not enhance after administration of IV contrast 2-3."