Reference for Chullin 96:23

אלא לאו מבפנים וש"מ

But has not R'Nahman stated that if one of the bronchial tubes was perforated it is trefah?<span class="x" onmousemove="('comment',' And in our case the needle, conceding even that it came directly via the bronchus, must have pierced one of the bronchial tubes to be found, as indeed it was, in the tissue of the lungs.');">⁷</span>

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