RT Book, Section
A1 Hardin, J. Matthew
A2 Knoop, Kevin J.
A2 Stack, Lawrence B.
A2 Storrow, Alan B.
A2 Thurman, R. Jason
SR Print(0)
ID 1181044155
T1 Psoriasis
T2 The Atlas of Emergency Medicine, 5e
YR 2021
FD 2021
PB McGraw-Hill
PP New York, NY
SN 9781260134940
LK accessmedicine.mhmedical.com/content.aspx?aid=1181044155
RD 2024/04/24
AB Psoriasis  has  many  forms.  The  most  common  is  chronic  plaque  psoriasis  with  stable,  symmetric  lesions  on  the  trunk  and  extremities,  especially  the  elbows  and  knees.  Lesions  are  well-defined,  erythematous  plaques  with  silvery  scales.  Inverse  psoriasis  represents  a  form  that  involves  the  intertriginous  areas,  and  due  to  the  moist  environment,  the  silvery  scale  is  absent.  Guttate  psoriasis,  common  in  children  and  young  adults,  presents  with  an  abrupt  eruption  of  2-  to  5-mm  erythematous  scaly  papules  on  the  trunk  and  extremities.  A  preceding  respiratory  infection,  usually  streptococcal  pharyngitis,  can  be  a  precipitant  of  guttate  psoriasis.  Pustular  forms  of  psoriasis  can  present  as  localized  (nail  bed,  finger,  palms,  or  soles)  or  generalized.  It  is  characterized  by  erythema  and  “lakes  of  pus.”  Triggers  for  pustular  psoriasis  include  steroid  withdrawal  (as  in  patients  with  chronic  obstructive  pulmonary  disease  [COPD]  and  asthma  exacerbations),  pregnancy,  infections,  and  topical  irritants.