[Perispondylitis psoriatica]

In their brief paper the authors draw attention to the rapid development of morphological changes on the axial skeleton in a patient with psoriasis vulgaris. They give a brief account of the classification of spinal and paraspinal ossifications in seronegative spondarthritis, spondyloses and other spondylopathies. The described case-history pertains to a paraspinal ossification and the authors try to explain why they assume that the term "Perispondylitis psoriatica" is quite justified.