My orthopaedic surgeon said he can't get to the posterior horn of my medial meniscus on arthroscope - is this true? is there any other option? can i still jog with this tear?

Not true: The posterior horn of the medial meniscus is sometimes difficult to reach via the arthroscope. However, it can usually be reached reliably and predictably with the scope. You may jog after knee arthroscopy. Other options are non operative treatment if pain is not an issue. Best option if painful is knee arthroscopy which usually takes about 30min surgical time. See a sports medicine specialist.

No: If your surgeon told you he can't reach the posterior horn of the medial meniscus i would promptly seek another orthopedic surgeon. This can be tricky but is easily accessible thru standard and possibly accessory medial portals. A posterior horn tear can be bad and can accelerate arthritic change in the knee. If can live with pain live with it. If hurts seek attention but not that guy.