Hi Samuel,
This is a little tricky from the images.
The area you are imaging looks to be seperate from the plantar plate. More towards the plantar aspect.
I am wondering if this is an area of adventitial bursa formation.
Was it hard on palpation or was it a little spongy?
You can get “para-plate cysts” which is a small synovial fluid leak through the
central part of the plate, and these are rarely clinically important. They are hard like a small ganglion and similar in ethology to a paralabral or paramedical cyst. The area you have photographed is much larger than these typically are.
I can see it has no flow in it.
It looks like it arises from the proximal portion of the MTP joint from the area where the joint capsule attaches to the metatarsal shaft at the proximal end of the MTP joint.
So what could it be:
Ganglion arising from the MTP joint.
Adventitial bursa.
I don’t think it is diagnostic of a plate tear.
It is not in the correct location for an inter metatarsal bursa or Morton Neuroma.
Please give me any additional information you have and any follow up / subsequent imaging.
Nice work mate,
Steve.