Has anyone ever heard of a cyst on/in the talus?

I’ve had foot and ankle problems since I was 9 years old, so that is nothing new. Two surgeries for correction of tarsal coalition, many cortisone shots… Lots of stuff. What is new is the appearance of what looks to my doctor like a cyst underneath my talus. Has anyone ever heard of a cyst on the talus or had to deal with this? Is it really treatable with injections/aspiration or just arthroscopic surgery? Any information would be appreciated!