Plague in Disguise: The Discovery of Occult Buboes on Surgical Procedure or Autopsy

Introduction: Bubonic plague classically manifests as a painful, swollen superficial lymph node (bubo) that is readily apparent on physical examination. However, patients occasionally present with buboes formed in deep lymph nodes, which are difficult to detect and can lead to delays in diagnosis and treatment. To better characterize this phenomenon, we conducted a review of the published literature to identify reports of occult buboes among patients with plague. Methods: Articles were identified from two sources: a systematic review on plague treatment, and a search of the PubMed Central database. Articles were eligible if they described a patient with plague who had (1) no evidence of lymphadenopathy on examination; and (2) at least one bubo discovered during surgery or autopsy. Results: Six patients with occult buboes were identified among 5120 articles screened. The majority were male ( n = 4/6) and three were