Suppurative Lymphadenitis

Suppurative Lymphadenitis

C. Cameron Yin, MD, PhD

A lymph node obtained from a patient with suppurative lymphadenitis. The lymph node in this field is entirely replaced by granulocytes (pus) image and surrounded by histiocytes and lymphocytes image.

Gram stain of a smear from a lymph node obtained from a patient with suppurative lymphadenitis. Numerous Gram-positive bacteria are present image.



  • Acute lymphadenitis

  • Pyogenic lymphadenitis


  • Acute lymphadenitis usually caused by bacterial, fungal, or some viral infections


Infectious Agents

  • Common bacteria: Staphylococcus and Streptococcus

  • Nontuberculous mycobacteria

  • Variety of fungi

  • Can also occur after bacillus Calmette-GuĂ©rin (BCG) vaccination



  • Incidence

    • Suppurative lymphadenitis is uncommon in developed countries

      • Due to availability of antibiotic treatment

  • Age

    • More common in children

  • Gender

    • No gender predilection

  • Ethnicity

    • Seen in all ethnic groups


  • Regional lymph nodes draining pyogenic inflammation

    • Dental abscess, upper respiratory infection, appendicitis, or infected wound

    • More commonly in superficial nodes, particularly axillary and inguinal nodes


Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Suppurative Lymphadenitis

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