Cat Scratch disease


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  • Clinical

    • Bartonella henselae
    • local skin infection
    • tender regional lymphadenopathy

  • Histology

    • early: follicular hyperplasia with foci of necrosis, microabscesses
    • late: large microabscesses, necrotizing granulomas

  • Stains

    • Warthin-Starry stains bacilli

  • Ddx

    • other infectious necrotizing lymphadenitis
      • lymphogranuloma venereum
      • tularemia
      • chancroid
      • mesenteric lymphadenitis
    • tuberculosis
    • fungus
    • Kikuchi disease
      • lack PMNs
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