In yet others, it may be progressive or rapidly progressive causing damage and osteoproliferation with the formation of syndesmophytes and "bamboo spine
." At each of these stages the disease shows a "stop-start" staccato course with phases of slow or rapid progression, then no progression at all for a variable time course only to restart progressing.
(13) Ochronotic spondyloarthropathy resembles ankylosing spondylitis (AS) in its damage to the spine and large joints; however, it differs in that it spares the sacroiliac joints and does not have the annular ossification, syndesmosis, or bamboo spine
that are associated with AKU.
In thoracic (Picture 1) and lumbosacral (Picture 2) graphs, marked squaring in her vertebras, shiny corners, symmetric syndesmophytes, bamboo spine
, trolley track sign, osteoporosis and left faced scoliosis were observed.