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May 2002

Red Nodule on the Finger of an Immunosuppressed Woman

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Copyright 2002 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.2002

Arch Dermatol. 2002;138(5):689-694. doi:10.1001/archderm.138.5.689

Hematoxylin-eosin–stained sections of the tissue specimen showed hyperkeratosis and acanthosis, with no evidence of infection or neoplasia. Gram and acid-fast bacillus stains and fungal cultures of the exudate were negative for organisms. Culture of the tissue yielded slow-growing, golden-yellow, atypical mycobacteria that were positive for acid-fast bacilli. Acid-fast bacillus stains and fungal cultures of bone marrow and blood samples were negative for organisms. Chest x-ray films revealed new scarring in the right upper lobe, which might have been the source of the mycobacteria or the result of radiation therapy or pneumonia.

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