nummular (discoid) eczema; exudative dermatitis

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Epidemiology

  • two peaks of incidence: young adults & old age
  • most common in fall & winter
  • especially common in elderly men during the winter
  • common in individuals with a history of atopic dermatitis

Pathology

Clinical manifestations

* images[3]

* claim that lesions are NOT pruritic; MKSAP17 & 19 state they are pruritic[2]

* claim that lesions are NOT vesicular

* coin-shaped jewelry can produce coin-shaped lesions of contact dermatitis due to nickel with predilection for wrists & neck where jewelry is worn

Laboratory

Differential diagnosis

Management

More general terms

References

  1. Color Atlas & Synopsis of Clinical Dermatology, Common & Serious Diseases, 3rd ed, Fitzpatrick et al, McGraw Hill, NY, 1997, pg 68-69
  2. 2.0 2.1 Medical Knowledge Self Assessment Program (MKSAP) 17, 19 American College of Physicians, Philadelphia 2015, 2022
  3. 3.0 3.1 DermNet NZ. Discoid eczema. (images) http://www.dermnetnz.org/dermatitis/nummular-dermatitis.html
  4. 4.0 4.1 4.2 NEJM Knowledge+ Dermatology
    Leung AKC, Lam JM, Leong KF, Leung AAM, Wong AHC, Hon KL. Nummular Eczema: An Updated Review. Recent Pat Inflamm Allergy Drug Discov. 2020;14(2):146-155. PMID: https://www.ncbi.nlm.nih.gov/pubmed/32778043 Review.