Jason is 9, turning 10 in May. He started limping last July (about 8 months ago) and the limp lasted for a couple of weeks and then went away so we didn't worry too much about it. In October we went on a camping trip and noticed the same limp had shown up again. I was going to ignore it again, since that had worked so well last time, but peer pressure as well as Jason asking to be taken in convinced me to just take him to the doctor and deal with being told it was no big deal and that an appointment really wasn't necessary...
He was complaining of pain in his knee and pointed right to the spot just below his knee cap as the source of the pain. The doctor told us that it was likely related to puberty even though he was only 9 (she said at the time that he was a bit young for this to show up) and it was likely caused by the muscle in the leg growing more quickly than the ability of the connection to his bone to keep up, but that it would go away with time and it shouldn't be a big deal. She told me to keep an eye on it and bring him back in if I was concerned.
I kept an eye on it. Every time I noticed a significant limp I would ask him where it hurt and he would always point to that same spot on his knee, so I just went with it and assumed he would out grow it.
Side note: I got re-married (eloped, because we could) in Dec 2015 to Casey - amazing guy!!
In late January Casey happened to be driving by while Jason was walking home from school and Casey watched Jason walking and decided that we needed to get him back to the doctor to have that limp looked at again. Jason really did have a super strange walk - at least when he wasn't thinking about how he was walking.
I scheduled an appointment for that Friday, a couple of days later, but on the day of his appointment I was violently ill with a stomach bug so Casey took him to the appointment for me. The doctor re-evaluated him and realized that the problem was not with his knee, as we had thought earlier and as he had been complaining of for months, but was actually with his hip.
They took x-rays and called me back later that night to tell me that he needed to see a specialist. She gave me a couple of different names/terms for what he had but the one that stuck was 'A -- necrosis of the femoral head'. (I didn't understand what the other terms were, so I didn't remember them. I looked it up later though and it was Avascular necrosis of the femoral head, or AVN for short). I knew that necrosis was cellular death and was rarely a good thing... We chatted for a while afterwards and she said that she would be calling the specialist first thing on Monday and to expect a phone call from them to set up an appointment soon. In the meantime they wanted him to avoid walking much and no running, jumping or other major physical activity. They prescribed him some crutches and told him to use them as often as he could.
I got a phone call on Monday telling me that the pediatric orthopedic surgeon had looked at the x-rays and wanted an MRI. There were a few things lower down on his leg that we hasn't sure about and thought the MRI would tell him more. So we got a referral for an MRI. I spent the better part of the next 2 hours on the phone. People calling me to schedule the MRI (the next morning at 7:30), then with the hospital to pre-register him, then with instructions about where to go, then from the nurse with details about what to eat/not eat what to wear where to actually go (since the previous info was for a patient who wasn't going to be sedated). It was a crazy day.
The next morning we went off to the hospital to have the poor kid sedated so he could have clear images on an MRI. They offered to just have him watch a movie and sit super still or to give him a more mild form of sedation, but that kid hates sitting still and I figured good images were more important than him being sedation free, so we drugged him and put him to sleep. It took the nurses several tries in three different spots to get an IV to stick, but Jason was a trooper and the staff was great.
We got a call the next day from the pediatrician saying that they had looked at the MRI and had tried to call the specialist, but he was in surgery so they would try again later in the week and I should hear back by Friday or Monday at the latest.
On Monday I gave up waiting and called again. We got an appointment for almost a month later to see the specialist and were told to keep up with using the crutches until then.
Well, I finally got to chat with the specialist on Friday and here's the news.
Jason’s right hip joint is not good. It’s slightly out of place and the top of the femur is no longer a normal ball-type shape (it looks more like a pancake). The doctor said Jason has Perthes disease. There’s not a well known cause for this.
These are both Jason's hips. Sorry about the weird angles. They came up on the screen at his office at a weird angle and I didn't think to adjust when taking the pictures. The x-ray on the right is his left hip. His good hip. The x-ray on the left is his right hip (backwards, I know, but they look slightly more like a human in my head if they are way, weird angles and all. Sorry for the confusion!!). If you can see where the femur connects into the hip socket on the right image, you can see a very pretty ball shaped - muffin top - type of bone. This is good. His right hip (left image) joint is not as pretty. The top of the femur is flattened and the bone looks lighter at the top. That is dense bone that is dying and/or already dead and collapsing on itself as it's flattened by normal daily activity. There are also some dark spots that are cysts forming on the bone.
These are the same hips just at a different angle. His good hip (the picture on the right) still has the ball shape and fits snugly inside the hip joint. His bad hip (the picture on the left, which is actually his right hip) has a distinctly flattened shape and looks like it's coming out of the socket a little bit. There is inflammation inside the hip joint that is pushing the femur out a bit.
The good news is that the dead bone will regrow. That's what bones do. :) The problem is that if the hip stays in the same position that it is now the bone will regrow with a saddle shape to it because the joint is not quite in the right place. Also, because he's on the slightly older range for this 'disease' the bone won't regrow as well as it would have if this had happened before he was 5 or 6. He simply has less growing to do before he's done growing so less time for the bone to get back to normal before it's set.
The doctor did an examination of Jason and tested his flexibility and range of motion. His left leg can extend to the side to about a 60 degree angle without much problem. His right leg goes out about 10 degrees before pain and compensating hip movement start to present. This is caused in part by a tightening in his inner thigh muscle and that is causing loss of range of motion as well as helping to keep the femur out of place.
Bottom line: Jason needs surgery. The doctor recommends a 'releasing' of the inner thigh muscle (cutting it in a strategic manner) and then keeping him in a cast for 6 weeks so his muscles can heal the way they want them to (meaning longer and with more give in them). The cast will be the kind that keeps his legs separated each leg 45 degree from center (so 90 degrees total).
This is the picture of the case on the paperwork he gave me
And after that 6 week period will be physical therapy to try to get, and keep, his femur back into the hip joint the way it should be. There will be several x-rays along the way to see how well his bone is regrowing, but it will be long process - think years, not weeks/months.
He will need to do physical therapy and avoid jumping/running/climbing type activities until he is ‘out of the woods’ (meaning the bone is regrown and firm enough to withstand the activity). I coerced the doc into a time line and he said it could take a year .. a year and a half .. two years of physical therapy. (Although much of what I've found online suggest something closer to 2-5 years) But after he’s ‘out of the woods’ he should have mostly full use of his hip, although he said it will never be normal. Among other problems, it could cause pain and arthritis and it will almost certainly wear out sooner than other people’s hips will and he will likely need a hip replacement maybe in his 40s or so. So, bad short to mid term news, pretty decent longish term prognosis, unfortunate hip issues much later in life (when my part will be more minimal 😊)