There is a chronic full-thickness tear of the anterior talofibular ligament
There is marrow edema within the talar head and neck. Different considerations include a bone contusion or stress reaction.
There is increased fluid in the posterior tibialis sheath consistent moderate tenosynoviitis with intermediate signal in inframalleolar component of the tendon consistent with mild tendinosis.
A type 2 accessory navicular is noted with marrow edema within.
Dr Blake's comment: Thank you so very much for emailing. I will try to give you my impressions with the info you provided. The MRI was very helpful, and you need another one 6 months from now to check on the edema. I see no place now to consider a surgery. Surgery typically would be a year from now if you are not able to get back. I know it sounds long, but you have to get rid of the underlining talar head and neck bone edema due to impact stresses. It probably is the cause of all your pain with secondary posterior tibial tendon issues. If you rush a talar injury, the stress fracture or stress reaction which is there now could become a full-blown fracture. I have seen fast recoveries from these, but I can not predict. You have to go one month at a time. You want a 9-month course of Exogen bone stim, and a current bone density and Vit D test. You should avoid all impact for 9 months and work on your ankle strength. The ankle sprains could be coming back to haunt you with instability and abnormal stresses. As long as you can avoid painful exercises, do the posterior tibial strengthening program, also Single Leg Balancing, and the peroneus longus and brevis therabands. Do contrasts each evening as a good flush to the superficial and deep bone swelling.
The basic routine is to avoid deep ankle flexion as with landing from a jump or deep plie in ballet. Avoid stretching your Achilles for the next month, then one month only with the knee straight, and no negative heel stretching where you drop the heel off the stair. Contrasts each evening, and evaluate bone density for issues. Bone stim for 9 months, and repeat MRI in 6 months. Start a super strengthening program. Stay in the boot 3 months, and then transition to shoes. Monthly evaluations should be done to check progress. I hope this helps. Rich.