Because Sometimes More is More
I’m not sure about any other cases, but William Stowell won a settlement several years ago after suing the hospital he was circumcised at. I believe that in his case proper consent wasn’t obtained from his mother, which is AFAIK was the key element of the suit. There was a similar case brought on last year by the parent’s of a child who was circumcised, but unfortunately they lost. Both cases were handled by David Llewelyn, an intactivist attorney. I also found a couple of other lawsuits over botched circumcisions.