Folliculitis

What it means

Inflammatory cells within the wall and ostia of the hair follicle, creating a follicular-based pustule.

In contrast to folliculitis, perifolliculitis refers to inflammatory cells, usually lymphocytes, within the perifollicular tissues with focal extension into the adjacent reticular dermis. Folliculitis and perifolliculitis can occur independently or incombination owing to follicular disruption and irritation.

Rare diseases that can present with this3

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, and Orphanet separately records 1 disease where this sign is specifically absent. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Follicular pustule · Hair follicle inflammation