I am 27 years old and currently 8+ months removed from ACL reconstruction in my right knee using a hamstring graft. I have developed a lump at the base of my patellar tendon that is painful when pressed upon. I saw my physical therapist about it, and she was concerned, but not to the point where she referred me to my surgeon. She performed Graston and said that if the lump gets any bigger or any more painful to schedule an appointment with my doc. It is currently about the size of a nickel and stands about a quarter inch off my knee.
I never had any sort of knee pain as a kid/teenager in either of my knees, never had any lump, etc., so I never even had a reason to be diagnosed with OS. This particular lump only popped up within the last 2-3 weeks. I should note that I did have some ongoing tendinitis at that EXACT spot that the lump has formed. Before my knee injury, however, I never had any problems with that knee.
Looking at symptoms for OS, what I'm experiencing fits that exactly, even down to the exact spot where this lump has formed. I know by definition that OS only occurs in kids/adolescents who are still growing, and it has something to do with growth plates. If this isn't OS, is there some type of adult equivalent that I could be experiencing?
I should note that for about three months as part of my rehab, I have been performing plyometrics such as box jumps, depth jumps and broad jump variations (single and double leg). I have increased the height/distance of the jumps gradually.