R. Yishmael the son of R. Yochanan b. Beroka said: I heard in Kerem Beyavneh that a man who has only one (testicle) is a saris chamah (a eunuch from the time of seeing the sun. i.e., one born without visible testicles. [This has various halachic implications.]) What is the difference between a petzua dakah and a kruth shafchah? A petzuah dakah can recover (from the injury); a kruth shafchah cannot. This is one of the "halachoth" of doctors.
"into the congregation of the L-rd": the congregation of Cohanim, the congregation of Levites, the congregation of Israelites, and the congregation of proselytes.