Dermatographism
Pronunciation: der-mat-oh-GRAF-iz-um
A form of physical urticaria in which firm stroking of the skin produces a linear wheal-and-flare response.
Full Definition
Dermatographism, also rendered as 'dermographism,' is a type of inducible urticaria in which mechanical pressure applied to the skin triggers mast-cell degranulation, producing a raised, erythematous linear weal within minutes. It is assessed clinically using a dermographometer to measure the pressure threshold. Editors will encounter both spellings ('dermatographism' and 'dermographism') in the literature; most major dermatology journals and the British Association of Dermatologists prefer 'dermographism,' though 'dermatographism' is accepted in American publications. The condition should not be confused with dermatography, a tattooing procedure used in aesthetic medicine. Authors should be consistent within a document.
Usage
Usage note: Both 'dermatographism' and 'dermographism' are acceptable; enforce consistency within a document and defer to house style. Do not confuse with 'dermatography' (cosmetic tattooing procedure).
In Context
- "Symptomatic dermatographism was confirmed by eliciting a wheal-and-flare response with a firm stroke across the forearm." — Allergy and dermatology clinical report
- "The author alternated between 'dermatographism' and 'dermographism' — please standardise to the journal's house style." — Copy-editing instruction