Not arguing with regard to the "cage" aspect, but I need to state - for the purposes of your audience and those who may come later to the discussion: we don't really call it "panna", much less "panna football" in the United States, but people will know "street soccer" instantly.
For example:
https://image.slidesharecdn.com/streetwisesoccerbrochure2015...This website says it's a rather underground new phenomenon taking hold in Florida. I know there are teams in Pennsylvania as well.
http://www.legendarystreetsoccer.com/teams/default.asp?u=LEG...This is also relevant with regard to the naming and the regions for "panna" vs. "tunnelling" vs. "nutmegging", because inevitably they are just forms of streetball to me, much like this Nike commercial:
https://www.youtube.com/watch?v=-sX-fc9Z1tIFor regional comparisons:
https://www.quora.com/What-is-this-technique-called-in-footb...Just for perspective. - BC