The medial posterior horn of the meniscus is prone to injury due to the fact that many patients in clinical practice present with a triad of knee ligament injuries, that is, injury to the medial collateral ligament, injury to the anterior cruciate ligament, accompanied by injury to the medial posterior horn of the meniscus, which is a triad of knee injuries. Injuries to the medial posterior horn of the meniscus require an early MRI and related investigations, as well as a ligamentous examination. If there are symptoms of posterior meniscal horn injury, such as popping or interlocking, and associated knee instability, this is treated, if necessary with a minimally invasive arthroscopic exploration of the meniscus. The damaged ligament is sutured or reconstructed to restore the integrity of the ligament and restore normal knee function.