Kashrut ruling on hanging adhesion emerging from an elevated covered lung blister

Description

Rabbi Feish declared an animal treif based on a hanging adhesion emerging from an elevated covered bu'ah, likening it to a gabshushis. The Chasam Sofer disagrees, ruling the animal kosher. He accepts the Simlah Chadashah's permissive position on hanging adhesions from covered bu'os and further argues that an elevated bu'ah is categorically distinct from a gabshushis, since its elevation is due to temporary pus accumulation rather than a structural lung defect.