Has anyone ever had a vet diagnose this to their lab.....all my Google searches come up with its a fancy and unnecessary term for a torn or damaged ACL....2 year old lab....65lbs....runs 3-4 miles a day.

Was fine yesterday morning....got sick and threw up around lunch....made him lay down the rest of the afternoon....got him back up at 5 and his left hind leg was lame.....would not put it down at all.

Tok him to the vet this morning and that was her diagnosis....he is better now walking and putting weight back on it as normal....xrays don't show anything but minor inflammation

Anyone else ever had this happen