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There’s also a study from Japan cited here before that shows that a Marcy-type repair worked well for adult male indirect hernias. It’s not clear why it’s inappropriate if there’s all this experience with it working well (Kang, Brown, and these studies).
Dr. Kang has reported great success with it on the whole gamut of adult male indirect hernias. He doesn’t cherry pick his cases other than that they’re mostly Korean. There’s the theoretical concern about recurrence, but it looks like in practice this hasn’t been shown to be a problem, so the basis for the objection isn’t clear.