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Axial bone proliferation causing cervical myelopathy in the mutilans form of psoriatic arthritis despite peripheral bone erosion
  1. J Ly,
  2. C Pinto,
  3. A Doyle,
  4. N Dalbeth,
  5. F M McQueen
  1. University of Auckland, Auckland, New Zealand
  1. Dr F M McQueen, Department of Molecular Medicine and Pathology, Faculty of Medicine and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand; f.mcqueen{at}auckland.ac.nz

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The radiographic features of psoriatic arthritis (PsA) can be broadly grouped into destructive and proliferative changes.1 Arthritis mutilans, described by Moll and Wright2 as “digital telescoping resulting from severe osteolysis” is the most florid form of erosive disease and occurs in less than 5% of cases. Bony proliferation is also characteristic of PsA and may help differentiate this condition from rheumatoid arthritis. We report a patient with PsA who developed cervical myelopathy as a result of proliferative bony change within the cervical spine, despite extremely severe erosive change at the peripheral joints.

The patient, a 65-year-old man, developed psoriasis at …

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