That is a tricky question. The edema is not good news but in young sportsmen normally resolves. But yours has not. The edema could be caused by a number of factors some not so serious, others more serious. So it is essential to have a detailed discussion with your rheumatologist on the causes of the edema. No-one on this board will be able to help you on that one because detailed knowledge is needed across the blood tests, xray and mri. Could be numerous conditions so you definitely need to go back to rheumatologist on that one as soon as possible. My gut feel and it is only gut feel not knowledge is that whatever caused the edema has caused the joint to be stressed and has damaged it. For this you need at your age to be referred to the best possible surgeon for an opinion as they may be able to treat you with the latest stem cell stuff - which is still in its infancy but could save your joint entirely or with joint compression or similar, depending on how much cartilege is lost. However, lot of crooks out there so hence the advice to go to a top teaching hospital which is doing research. However, a top orthopedic surgeon has a range of options if the joint is damaged depending on e.g. if the joint has micro fractures not visible of x-ray, whether there is a further underlying condition causing the edema or if the edema is temporary and will heal. Any good surgeon woudl only operate as a last resort but they may have a view on e.g. if you have a tendon tear, if there is debris in the joint etc etc, if there is underlying issue etc etc.
Look, no point in worrying as you now need to know MUCH more from a) the rheumatologist - it is simply not good enough he has told you OA - there is an underlying issue here with the edema and b) a really good surgeon for an opinion. I think its quite important you see someone quickly as some conditions have a window of opportunity for treatment that is then lost. This may all sound scary but its not life threatening; but could get more painful so you do need to get action and be determined.
Clearly the joint is currently inflamed. Therefore, i would try and control the inflammation by a) diet b) ask the rheumy exactly what supplements you need a.s.a.p. You cannot go wrong eating tons of fruit and veg and fish - which shoudl negate the need for supplements but they may give you calcium depending on certain underlying conditions. I personally would only do pilates type non stressful exercises to keep the joint mobile until you have a better handle on what is causing the edema and why it is not clearing and why the joint is so stressed.
The squat could have caused a ligament or tendon issue which then unbalanced the joint which has then worn on one side. IF this is the case, fundamental at your age to ask to be referred to a top orthopaedic surgeon in a teaching hospital who may consider you for stem cell treatment to repair it / or some other orthopaedic procedure. This is quite important as all of this stuff is really new but if the cartilege wears away completely you are not in a good place. So be determined, take action, take control, ask lots more questions of the rheumatologist and dont be satisfied with simply 'OA', take pain killers. This may soound a bit scary but things to ask your rheumy are things like
"what is causing the edema.. do i have necrosis of the hip?" "Do i have transient osteoporosis?" " Can i be referred as a trial, given my age, to JH, as i understand they are doing stem cell transplants on hips"... i suggest this so he takes you seriously and that you are going to be a pain in neck to him and thus he will want to refer you on to a teaching hospital. Say stuff like " I know this is at the forefront of medical knowledge and i am scared. But i dont want the standard guidelines of NSAIDs at my age. i know the top teaching hospitals are running clinical trials and they may save my hip joint.. can you get me referred..."
It truly depends on what is the underlying issue... if hip necrosis then the blood supply to the hip joint is an issue and e.g. JH might treat this with decompression but you need to get action quite quickly before it gets too damaged. But it might not be necrosis. How bad it is depends on the edema and what is causing it.
My gut feel from what you have said is that an injury damaged the bone which in turn damaged the joint rather than the other way round. Neither are great news but it is likely to be this one joint - you just need to get to the bottom of the edema and then get the best possible teaching hospital on the case. I think if you nag or write they will be interested in you due to your age. Most doctors get bored with seeing e.g. 60 year old women all with the same issue. You are interesting to them and slightly unusual thus nag your rheumy to refer you on ASAP, as you will be of interest and i think they will want to see you as you will increase their learning curve. A good teaching hospital will be able to treat you to delay further treatment for many years if you act quickly. i.e. your results are serious due to your age but not life threatening but try and get non-standard treatment at forefront of current practice rather than standard guideline stuff. Simply not good enough the rheumatologist has said OA. Does not sound like primary OA to me - the edema is significant in this regard. Something is damaging the bone and it is not resolving.
Suggest you google John Hopkins Hip Stem Cells - a load of papers will come up. Write to JH ASAP. It is no 1 globally but you are interesting to them. They are running a trial at the moment. Ask them for help due to your age. Dont despair but you DO need to get into action mode. You do need a teaching hospital so ask your rheumy to refer you onwards. If in NY, also dont depair as every top rheumy is following what JH are doing. Get on the JH mailing list - from their web sites - as this will enable you to see their clinical trials and you can write to be on one. i get their stuff sent every week.
I am a researcher and collate as much as possible from round the world for 3 top guys in the field over here so they can access easily. A top guy in NY would know what the top guys in JH are doing and be following it.
the only other tip i can give you is "Dont have conversations with your brain. dont talk to it. SImply have one conversation with the chatter box in your brain and that is " shut up, its going to be ok, i am on the case to get the right and best treatment now and thats that. i'm gonna write down a plan of action and then im going to get 8 hours sleep, wake up eat lots of fruit fish and veg and get on the case of getting a referral to the right guy. in the meantime, i just have to get through today and as i got through yesterday, i expect i can get through today. So whilst i am concerned i am not going to worry as that will only release more cortisol to make it worse. I am now on the case, so brain stop worrying me. "
hope this helps. Part of the action plan should be to go and buy some good veggie cook books so you dont get bored eating all those vitamins + writing to JH for advice + getting their stuff sent to you + seeing your rheumy ASAP + getting some sleep + getting some pilates / low stress non-weight bearing exercises which keep your hip mobile whilst not stressing it at all. Go for it! Action requried!