Chronic reactive arthritis associated with prostatitis caused by Neisseria meningitidis

Description

A 29-year-old man presented with a 10-year history of pain in his right ankle. The ankle was tender and swollen, and there was Achilles tendinitis. He had no complaints of buttock pain, abdominal pain, dysuria or a feeling of incomplete voiding. Skin examination was normal. Laboratory investigations revealed a leucocyte count of 6.0x10⁹/L and a serum C reactive protein level of 5.21 mg/dL. Liver and renal function tests were normal. Rheumatoid factor, anticyclic citrullinated peptide antibody and antinuclear antibody were negative. Urinalysis was positive for occult blood, but there was no leucocyturia. Locus B human leukocyte antigen (HLA) typing was positive for B27. Plain radiography of the right ankle joint showed narrowing of the subtalar joint space and heel spurs on the plantar aspect of the calcaneus (figure 1). Contrast-enhanced CT scans demonstrated enhanced lesions in the peripheral zone of the prostate (figure 2). Culture...

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