Dermatology in Practice

This item requires a subscription.

Photocontact allergy and photopatch testing
DIP, Volume 10, Number 3.

Photocontact allergy is uncommon and considered to be a delayed type IV hypersensitivity reaction, in which a photoactivated chemical acts as an antigen or hapten.1 Photopatch testing is used to investigate and diagnose photocontact allergy;2 sunscreen chemicals are the major group of clinically relevant photoallergens. Both sunscreen users with normal sun sensitivity and patients with existing photosensitive diseases may develop photocontact allergy, and this needs to be considered as a differential diagnosis in the presentation of a patient with a photo-exposed site dermatitis or with a history of a reaction to a sunscreen.

To view this item, select one of the options below:

	Purchase access
	In order to view articles you will need to pay a subscription for either 24-hour or annual access. You can view all articles on this site during the subscription period. Please click here to subscribe.

	Sign in
	If you are already have a subscription, please sign in here.
	email address
	Password
	Forgotten your password?

	Important
	All the articles are in PDF format.
	To view the articles you will need Adobe Acrobat Reader.
	To download a copy, free of charge, please click here.

	Help
	If you need help accessing this site, please click here.

The data, opinions and statements appearing in the articles herein are those of the contributor(s) concerned; they are not necessarily endorsed by the sponsors, publisher, Editor or Editorial Board. Accordingly the sponsors, publisher, Editor and Editorial Board and their respective employees, officers and agents accept no liability for the consequences of any such inaccurate or misleading data, opinion or statement.
Copyright (©) 2010 Hayward Group Ltd. The title Dermatology in Practice is the property of Hayward Group Ltd and, together with the content, is bound by copyright. The information contained on the site may not be reproduced, distributed or published, in whole or in part, in any form without the permission of the publishers. All correspondence should be addressed to: admin@hayward.co.uk