Fungus
Cutaneous Blastomycosis
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Cutaneous Blastomycosis
See Also
Blastomycosis
Etiology
Blastomyces dermatidis
Pathophysiology
See
Blastomycosis
Direct contact of non-intact skin with contaminated soil or decomposing timber
Symptoms
Painful facial lesions (
Pustule
s, ulcers or wart-type lesions)
Signs
Distribution: Face (esp. eyebrows)
Verrucous form
Starts as
Papule
or
Pustule
with slow enlargement
Later, the lesion forms crust with irregular borders
Secondary
Subcutaneous Nodule
s and abscesses may drain pus
Ulcerative form
Ulcerated lesion with sharp border
Friable red granulation tissue at ulcer base may bleed easily
Diagnosis
Microscopy of purulent discharge with
Potassium Hydroxide
or Calcofluor stain
Skin biopsy
Differential Diagnosis
Furuncle
Contagious
Ecthyma
(Orf)
Pyogenic Granuloma
Squamous Cell Carcinoma
Management
See
Blastomycosis
References
Altman (2007) Am Fam Physician 76:1533-4 [PubMed]
Bradsher (2003) Infect Dis Clin North Am 17:21-40 [PubMed]
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