Abnormal nasolacrimal system morphology

What it means

An abnormality of the nasolacrimal drainage system, which serves as a conduit for tear flow from the external eye to the nasal cavity.

The nasolacrimal system consists of the puncta, canaliculi, lacrimal sac, and nasolacrimal duct.

Rare diseases that can present with this12

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Abnormality of the nasolacrimal system