Cat scratch fever other diagnostic studies

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Raviteja Guddeti, M.B.B.S. [2]

Biopsy

• Biopsy of the lymph nodes is not routinely employed but when taken can aid in the diagnosis of cat scratch disease. Findings in the biopsy include:
  • Nonspecific inflammatory infiltrates
  • Granulomas
  • Micro-abscesses

High magnification micrograph of cat scratch disease showing a granuloma (pale cells - right of center on image) and a microabscess with neutrophils (left of image). H&E stain.

• Biopsy of the liver and spleen can also be taken if they are involved in the disease process.