| Summary points: | A 32-year-old male presents with complaints of pain and swelling of multiple joints and backache for 1 month, and fluid-filled skin lesions over his back, forehead, limbs, and buttocks. Physical examination, laboratory tests, roentgenogram, echocardiogram, magnetic resonance imaging, and skin biopsy are described; images provided. The authors discuss the concurrent occurrence of reactive arthritis and myelitis, and the common mechanisms involved in the causation of these 2 phenomena. |