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[Pyogenic spondylitis in the interarticular portion of the vertebral arch. Case report on primary dorsal spondylitis].

The manifestation of a pyogenic spondylitis only in the dorsal part of a spinal segment is very rare and causes even more diagnostic problems than the typically anterior located spondylitis. We are reporting on a patient with known isthmic spondylolisthesis who developed the inflammatory process primarily in the intervertebral joint and in the interarticular portion. For a few months the cause of his complaints was thought to be due to spondylolisthesis till radiological adn laboratory methods lead to the correct diagnosis and adequate therapy.