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Papers of the Week

2020 Sep 17

J Dermatol

Case of aquagenic urticaria: Case report and the results of histopathological examination.


Fukayama M, Domoto Y, Sato S, Asano Y
J Dermatol. 2020 Sep 17.
PMID: 32940373.


Aquagenic urticaria (AU) is a rare skin condition in which dermal contact with water serves as a trigger of urticaria and pruritus. To make a diagnosis, a water challenge test is useful. We herein report a 16-year-old Japanese boy diagnosed with AU by water provocation test. The induced skin lesion histologically showed prominent degranulation of mast cells and lymphocytic infiltration throughout the dermis. This is the second report documenting the histopathological features of AU.