title: Multiple myeloma presenting with primary meningococcal arthritis.
abstract: A 64-year-old white man presented with Neisseria meningitidis primary septic arthritis. Further evaluation revealed multiple myeloma. Increased susceptibility to infection occurs early in multiple myeloma; thus, a rare cause of primary septic arthritis, such as N. meningitidis, warrants a full evaluation for immunocompromise.
mesh_terms: D001170:Arthritis, Infectious / Q000209:etiology*; D006801:Humans; D007719:Knee Joint; D008297:Male; D008589:Meningococcal Infections / Q000209:etiology*; D008875:Middle Aged; D009101:Multiple Myeloma / Q000150:complications* / Q000175:diagnosis; D009345:Neisseria meningitidis / Q000302:isolation & purification