Hypopyon sign: a half full or half empty scenario
DOI:
https://doi.org/10.18203/issn.2455-4529.IntJResDermatol20233879Keywords:
Pemphigus foliaceous, Pemphigus vulgaris, Hypopyon sign, Subcorneal pustular dermatosis, Sneddon-Wilkinson disease, Direct immunofluorescence testAbstract
The term "half-half blister" or the "hypopyon sign" refers to small vesicles that evolve into pustules, with the pus typically concentrating in the lower half of the vesicle. There is typically a transverse fluid level with purulent material at the bottom. This sign is usually not exclusive to a particular dermatological condition as it is seen in cases of subcorneal pustular dermatosis (Sneddon-Wilkinson disease), pyodermas and secondary infected vesicobullous disorders (such as pemphigus, bullous pemphigoid, and linear IgA dermatosis).
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