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Plague Bubo (Femoral)

A bubo, an enlarged, tender, firm lymph node, is caused by Yersinia pestis (plague) infection. Many become suppurative. Lymph nodes most commonly involved, in decreasing order, are the femoral, inguinal, axillary, and cervical nodes.

Image courtesy of Drs. Margaret Parsons and Karl F. Meyer via the Public Health Image Library of the Centers for Disease Control and Prevention.