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Can Fam Physician. 2010 November; 56(11): 1149.
PMCID: PMC2980432

Question: Can you identify this condition?

An external file that holds a picture, illustration, etc.
Object name is 1149fig1.jpg

A 64-year-old otherwise healthy woman presents with a solitary, well-defined, slightly scaly, erythematous plaque on her lower back. The patient notes that the plaque has been slowly enlarging over the past year.

The most likely diagnosis is

  1. Psoriasis
  2. Bowen disease (squamous cell carcinoma in situ)
  3. Nummular eczema
  4. Extramammary Paget disease
  5. Superficial basal cell carcinoma

Answer on page 1151

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