Diagnosis of Ureaplasma urealyticum septic polyarthritis by PCR assay and electrospray ionization mass spectrometry in a patient with acute lymphoblastic leukemia

We report a case of polyarthritis with axial involvement in a young female patient treated for acute lymphoblastic leukemia. Detection in the hip fluid of Ureaplasma urealyticum by broad-range PCR followed by electrospray ionization mass spectrometry allowed the diagnosis of septic arthritis and ad integrum recovery upon adapted antibiotic therapy.