Which histologic findings are characteristic of chancroid?

Updated: Aug 05, 2019
  • Author: Joseph Adrian L Buensalido, MD; Chief Editor: Pranatharthi Haran Chandrasekar, MBBS, MD  more...
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Gram stain of the ulcer exudates may reveal short, plump, gram-negative rods in the classic school of fish appearance. Ulcer biopsy should reveal 3 distinct zones. The most superficial zone contains erythrocytes, fibrin, necrotic tissue, and neutrophils. The next zone consists of marked endothelial cell proliferation and many thrombosed new blood vessels. The deepest layer is characterized by a dense infiltrate of plasma and lymphoid cells.

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