Comedonal Acne
A subtype of acne vulgaris dominated by non-inflammatory open (blackhead) and closed (whitehead) comedones, with minimal inflammatory lesions.
Full Definition
Comedonal acne is classified as the mildest form of acne vulgaris and is characterised predominantly by open comedones (blackheads, where the follicular plug is exposed to air and oxidises) and closed comedones (whiteheads, where the plug is beneath an intact epidermis), with few or no inflammatory papules, pustules, or nodules. It most commonly affects the forehead and nasal area in adolescents. Editors should note that this is distinct from nodulocystic acne (the most severe form). 'Comedonal' is the correct adjectival form of 'comedone'—not 'comedogenic', which refers to the capacity of a substance to cause comedone formation.
Usage
Usage note: 'Comedonal' (relating to comedones) must not be confused with 'comedogenic' (tending to cause comedones). This is a frequent editorial error in patient-facing and pharmaceutical documents.
In Context
- "The patient presented with mild comedonal acne and was initiated on topical adapalene 0.1% gel." — Outpatient acne clinic letter
- "The clinical photograph caption was corrected from 'comedogenic acne' to 'comedonal acne'." — Medical textbook editorial note