RT Book, Section
A1 Blauvelt, Andrew
A2 Goldsmith, Lowell A.
A2 Katz, Stephen I.
A2 Gilchrest, Barbara A.
A2 Paller, Amy S.
A2 Leffell, David J.
A2 Wolff, Klaus
SR Print(0)
ID 56033655
T1 Chapter 42. Pityriasis Rosea
T2 Fitzpatrick's Dermatology in General Medicine, 8e
YR 2012
FD 2012
PB The McGraw-Hill Companies
PP New York, NY
SN 978-0-07-166904-7
LK accessmedicine.mhmedical.com/content.aspx?aid=56033655
RD 2024/04/18
AB |PrintPityriasis  Rosea  at  a  GlanceCommon  acute  papulosquamous  eruption  normally  lasting  4–10  weeks.Most  often  begins  as  a  single  2-  to  4-cm  thin  oval  plaque  with  a  fine  collarette  of  scale  located  inside  the  periphery  of  the  plaque  (“herald  patch”).Similar-appearing,  but  smaller,  lesions  appear  several  days  to  weeks  later,  typically  distributed  along  the  lines  of  cleavage  on  the  trunk  (“Christmas  tree”  pattern).Usually  asymptomatic,  sometimes  pruritic  with  mild  flu-like  symptoms.Occurs  most  commonly  in  teenagers  and  young  adults.Probably  a  viral  exanthem  associated  with  reactivation  of  human  herpes  virus  (HHV)-7  and  sometimes  HHV-6.Treatment  is  usually  supportive,  although  midpotency  topical  corticosteroids  can  reduce  pruritus;  high-dose  acyclovir  for  1  week  may  hasten  recovery.