Pili canaliculi

What it means

A characteristic triangular, kidney- or heat-shaped diameter of hair shafts with typical longitudinal canalicular deformation as observable by scanning electron microscopy.

Rare diseases that can present with this2

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