TY  - CHAP
M1  - Book, Section
TI  - Chapter 92. Abnormal Responses to Ultraviolet Radiation: Photosensitivity Induced by Exogenous Agents
A1  - Lim, Henry W.
A2  - Goldsmith, Lowell A.
A2  - Katz, Stephen I.
A2  - Gilchrest, Barbara A.
A2  - Paller, Amy S.
A2  - Leffell, David J.
A2  - Wolff, Klaus
PY  - 2012
T2  - Fitzpatrick's Dermatology in General Medicine, 8e
AB  - |PrintAbnormal  Responses  to  Ultraviolet  Radiation  at  a  GlancePhotosensitivity  is  broadly  divided  into  phototoxicity  and  photoallergy,  caused  by  topical  or  systemic  agents  that  absorb  ultraviolet  A  (UVA)  energy.Phototoxicity  occurs  in  anyone  exposed  to  sufficient  phototoxic  agent  and  UV  radiation  and  usually  manifests  as  an  exaggerated  sunburn  reaction.Photoallergy  is  an  immune  reaction  to  a  UVA-modified  chemical,  commonly  topical  sunscreen  agents  and  antimicrobials  in  the  United  States  and  the  United  Kingdom  and  topical  nonsteroidal  anti-inflammatory  agents  in  Europe.  It  presents  as  eczematous  eruption  on  sun-exposed  areas.History  taking  is  an  important  part  of  the  evaluation;  phototesting  and  photopatch  testing  are  sometimes  helpful.Differential  diagnosis  includes  contact  allergic  or  contact  irritant  dermatitis,  airborne  contact  dermatitis,  and  other  photodermatoses.Management  consists  of  identification  and  avoidance  of  the  precipitating  agent,  photoprotection,  and  symptomatic  therapy.  
SN  - 
PB  - The McGraw-Hill Companies
CY  - New York, NY
Y2  - 2024/04/18
UR  - accessmedicine.mhmedical.com/content.aspx?aid=56051779
ER  -