RT Book, Section
A1 Shah, Ashish
A1 Sobolewski, Brad
A1 Mittiga, Matthew R.
A2 Knoop, Kevin J.
A2 Stack, Lawrence B.
A2 Storrow, Alan B.
A2 Thurman, R. Jason
SR Print(0)
ID 1177127363
T1 Henoch-Schönlein Purpura (Iga Vasculitis)
T2 The Atlas of Emergency Medicine, 5e
YR 2021
FD 2021
PB McGraw-Hill
PP New York, NY
SN 9781260134940
LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1177127363
RD 2021/01/17
AB Henoch-Schönlein  purpura  (HSP)  is  the  most  common  systemic  vasculitis  in  children,  with  a  peak  incidence  between  ages  3  and  15  years  and  with  90%  of  patients  younger  than  age  10.  It  is  characterized  by  four  main  clinical  manifestations.  The  classic  exanthem  of  HSP  begins  with  erythematous  macules  or  urticaria  that  eventually  coalesce  and  evolve  into  ecchymotic  lesions  and  palpable  purpura.  The  lesions  are  more  often  located  on  the  buttocks  and  gravity-dependent  areas  (lower  extremities)  in  ambulatory  children.  In  nonambulatory  children,  the  lesions  can  be  seen  on  the  face,  trunk,  and  upper  extremities  as  well.  Mucosal  involvement  is  rare;  however,  edema  of  the  scalp,  hands,  scrotum,  and  periorbital  tissue  occurs.