Lymph Node Cytology - American Society for Veterinary Clinical ...

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Lymphadenitis• Increased numbers of neutrophils (>5%),eosinophils (>3%), or macrophages• Must take into consideration degree of bloodcontamination• Named for the predominant inflammatorycell type(s)• Reactivity/hyperplasia often present aswell
Lymphadenitis• Suppurative or (pyo)granulomatous• Must look for an etiologic agent• Metastatic neoplasia can cause this type ofinflammation
Page 4 and 5: Indications for Lymph NodeAspiratio
Page 6 and 7: Indications for Lymph NodeAspiratio
Page 8 and 9: Sample Acquisition• 22-gauge need
Page 10 and 11: Ruptured Cells
Page 12: Normal Lymph Node• 85-90% small
Page 19: Normal Lymph Node• Low numbers of
Page 25 and 26: Normal Lymph Node• Occasional neu
Page 27: Reactive/hyperplastic• Small lymp
Page 33 and 34: Reactive/hyperplastic• May also s
Page 36: Lymphoma• 50% lymphoblasts• La
Page 43: Lymphoma• Diagnostic difficulties
Page 47 and 48: Histoplasma sp.
Page 49: Metastatic Neoplasia• Defined by
Page 54 and 55: Perinodal Fat
Page 57: Questions/Comments

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