MACI or ACI

“If you can make it to the new year, this is our best option.”

In the first quarter of 2017, the FDA approved Matrix-Induced Autologous Chondrocyte Implantation (MACI) for use on articular cartilage defects of the knee joint in the US. Insurance companies, as usual, lagged behind for coverage of all defects.

MACI replaced the ACI procedure that had been in use for quite a few years. The greatest difference between these two procedures is that MACI utilizes a man-engineered matrix to load healthy cells into your defect, whereas ACI mostly utilizes your own tibial periosteum to hold the healthy cells. Both procedures require an initial surgery to take a biopsy of healthy tissue that can be used to develop these cells which can mature anywhere from 12-18 months. Both procedures are also frequently coupled with an osteotomy or anteromedialization.

The goal of the MACI or ACI surgery coupled with an osteotomy of the tibial tubercle is to move the weight bearing surface of the joint away from the defect. Almost like a semi-safety net that should allow for a decrease in pain and other symptoms just in case the graft ends up failing.

None of this was explained to me. As I peppered my doctor with a multitude of questions on what procedure would result in the best outcome for my specific defect area, he insisted that the revolutionary aspect of MACI was my best option with the highest chance of success.

While beginning my research, I believed an 85% success rate was good enough for me, but I had tunnel vision. Everything leading up to hearing about MACI has been the worst case scenario that was presented. I didn’t consider many of the things that could go wrong committing to a procedure that was just brought overseas.

And so I left 2016, and the 16th year of my life looking forward to the next year. It would only take two surgeries, and a solution was in sight. It wasn’t experimental, it was medicine. Little did I know.

Thinning and Speckled Cartilage

After waiting nearly 3 hours and missing the end of the school day, when I anticipated missing one class at most, this was the extent of the explanation I received.

I was told at this stage, from what could be determined by my MRI, surgery was unnecessary and treatment beyond physical therapy and the synvisc-one injection I had received was overkill.

I still lacked clarification. Although more invasive treatment options were out of the question, they were all presented, and I was EXTREMELY confused. I understood what a scope and debridement was, but what was ACI, and why was there not a single understandable source on what the surgery entailed?

Hearing that I had “thinning and speckled cartilage” finally caused things to click in my head. This wasn’t an everyday knee injury for someone my age, and it wasn’t the torn meniscus I was originally told I might have. This wasn’t and isn’t an injury that can be repaired in a straightforward manner, and there continues to be a possibility in the present-day that my only permanent repair is full knee replacement.

Over the next 3 months, I would continue the regime of physical therapy originally prescribed, constantly searching for a physical therapist that would focus on my whole body in hopes that would solve the problem going on within my knee. This was little help no matter how invested or qualified the physical therapist. I was in so much pain, I couldn’t bend my knee standing or lay it flat in bed.

I was confused how cartilage could control by body and my life in this way, and I begged for more invasive treatment.

Summer “Workouts”

“One of our top Juniors is out for now with a knee injury, but we’re not concerned.”

It was a blip in a local article. Just a blip. But for some reason I couldn’t help but feel that everyone knew something I didn’t. Why mention it? Why let every coach in the conference know that I was injured when I would be playing 6 rotations for the first time in my life? But God, forget about it, it’s just a blip.

Soon the article wouldn’t matter, because the giant J-shaped brace to push over my patella to help relieve pain and my inability to run or move laterally gave myself away before I could even get out of the summer “workout” season.

Maybe it was these “workouts” that killed me. Grueling 2-4 hour practices in a non-air conditioned gym that would help “condition” us for the upcoming season. In reality these practices resulted in the greatest number of injuries, and helped to worsen the mangled mess of cartilage that laid hidden within my knee joint.

I spent that summer bouncing between practice and physical therapy with a cortisone and Synvisc-one shot mixed in–all without a diagnosis. My MRI was inconclusive; physical therapy and shots were providing no relief, and I was waking up each morning in more and more pain.

At this point, it wasn’t about the recruiting. It wasn’t about being ready for the fall season, or even getting through a single summer “workout.” I was in the worst pain in my life, unable to straighten my leg in bed or walk up or down the stairs.

I wanted out. I wanted answers. I wanted help.