TY  - CHAP
M1  - Book, Section
TI  - Parapsoriasis and Pityriasis Lichenoides
A1  - Schieke, Stefan M.
A1  - Wood, Gary S.
A2  - Kang, Sewon
A2  - Amagai, Masayuki
A2  - Bruckner, Anna L.
A2  - Enk, Alexander H.
A2  - Margolis, David J.
A2  - McMichael, Amy J.
A2  - Orringer, Jeffrey S.
PY  - 2019
T2  - Fitzpatrick's Dermatology, 9e
AB  - AT-A-GLANCEAlso  known  as  parapsoriasis  en  plaques.Parapsoriasis  occurs  worldwide  and  affects  mainly  adults.Large-plaque  parapsoriasis  (LPP)  and  small-plaque  parapsoriasis  (SPP)  are  recognized.Large  and  small  “plaque”  lesions  actually  present  as  flat  patches  rather  than  infiltrated  plaques.Lesions  are  chronic  and  favor  non–sun-exposed  skin;  LPP  may  be  poikilodermatous.Pathology  consists  of  superficial,  mostly  CD4+  T-cell  infiltrate;  dominant  clonality  is  more  common  in  LPP  than  in  SPP.LPP  appears  to  exist  on  a  continuum  with  patch-stage  mycosis  fungoides  (MF)  and  progresses  to  overt  MF  at  a  rate  of  approximately  10%  per  decade.SPP  has  minimal  risk  of  progression  to  overt  MF  in  the  experience  of  most  experts.Treatment  options  include  topical  corticosteroids;  ultraviolet  B  irradiation,  and  psoralen  and  ultraviolet  A  irradiation;  excimer  laser;  and  topical  cytotoxic  drugs.  
SN  - 
PB  - McGraw-Hill Education
CY  - New York, NY
Y2  - 2024/04/18
UR  - accessmedicine.mhmedical.com/content.aspx?aid=1161323249
ER  -