I wonder if @[email protected] might be thinking of https://en.wikipedia.org/wiki/David_Reimer

Reimer was an identical twin AMAB who was raised female due to his penis being mangled during circumcision. The gender was then reassigned as female and the infant had surgical procedures done to align the body with the new female gender. The case was overseen by John Money who made a lot of hay over it, publishing all about how this proved gender was a purely social construction. It was a very famous case study. Ultimately Reimar he felt himself to be male and transitioned to male as an adult. However he was very screwed up by the whole thing and my understanding is his death by suicide is attributed to this whole series of events. There was a lot of weird stuff.