| lacrimal fistula | An abnormal opening into a tear duct or the lacrimal sac. (05 Mar 2000) |
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| lacteal fistula | A fistulous opening into one of the lactiferous ducts. Synonym: mammary fistula. (05 Mar 2000) |
| lymphatic fistula | A congenital fistula in the neck connecting with a lymphatic vessel and giving exit to lymph. (05 Mar 2000) |