RT Book, Section
A1 Silverberg, Jonathan I.
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.
SR Print(0)
ID 1161322374
T1 Nummular Eczema, Lichen Simplex Chronicus, and Prurigo Nodularis
T2 Fitzpatrick's Dermatology, 9e
YR 2019
FD 2019
PB McGraw-Hill Education
PP New York, NY
SN 9780071837798
LK accessmedicine.mhmedical.com/content.aspx?aid=1161322374
RD 2024/04/18
AB AT-A-GLANCENummular  eczema:Also  known  as  nummular  dermatitis  and  discoid  eczema.A  chronic  inflammatory  skin  disorder  of  unknown  etiology.Papules  and  papulovesicles  coalesce  to  form  nummular  plaques  with  oozing,  crust,  and  scale.Most  common  sites  of  involvement  are  upper  extremities  in  men  and  women,  particularly  the  dorsal  hands  in  women,  and  the  lower  extremities  in  men.Pathology  may  show  acute,  subacute,  or  chronic  eczema.Lichen  simplex  chronicusA  chronic,  severely  pruritic  disorder  characterized  by  one  or  more  lichenified  plaques.Most  common  sites  of  involvement  are  scalp,  nape  of  neck,  extensor  aspects  of  extremities,  ankles,  and  anogenital  area.Pathology  consists  of  hyperkeratosis,  hypergranulosis,  psoriasiform  epidermal  hyperplasia,  and  thickened  papillary  dermal  collagen.Prurigo  nodularisAlso  known  as  prurigo,  picker’s  nodules,  or  nodular  prurigo  of  Hyde.A  pruritic  disorder  that  runs  a  chronic  course.Hyperkeratotic  firm  nodules  vary  in  size  from  0.5  to  3.0  cm  and  may  be  excoriated.Associations  include  atopic  dermatitis  and  systemic  causes  of  pruritus.Pathology  consists  of  hyperkeratosis,  hypergranulosis,  psoriasiform  epidermal  hyperplasia,  thickened  papillary  dermal  collagen,  and  characteristic  neural  hypertrophy.