An abnormal passage or ulceration leading from an internal organ or infected tissue to the body surface or to another organ; also known as 瘘管 lòu​guǎn.

(literary) A swelling or lump on the neck, often associated with a goiter or scrofula.

(bound form) Used in the word 痀瘘 jū​lǘ, meaning a hunchback or someone with a bent spine.

fistula; ulceration