The Finochietto Sign as a Pathognomonic Finding of Ramp Lesion of the Medial Meniscus.

Ramp lesions are considered hidden injuries of the medial meniscus and are very difficult to diagnose. The Finochietto jump sign is a very specific finding that could be considered pathognomonic regarding ramp lesions. This sign consists of a sudden jerk that appears when the free edge of the posterior horn of the medial meniscus is dislocated anteriorly due to the medial condyle interposition when an anterior drawer test is performed on a knee with a ramp lesion, especially when it is associated with an anterior cruciate ligament tear. In this technical note, the Finochietto sign is described clinically, is correlated with its exploration under anesthesia, and is described for the first time under arthroscopic examination in the case of a ramp lesion, in which this finding can help to the diagnosis when present, especially when associated with anterior cruciate ligament tears.