An instance of an atypical intraspinal cyst presenting as S1 radiculopathy: a case report and brief review of pathophysiology.
Intraspinal cysts are rare, but typically they originate from a degenerate zygapophyseal joint. These cysts have been commonly referred to as juxtafacet cysts and occur concomitantly with lumbar and occasionally lower-limb radicular pain. Documented cases have shown pseudoarthroses developing from nonhealing pars defects. Histologic analyses have found synovial tissue within these fibrocartilaginous accumulations. We present a case of S1 radiculopathy indicated by an intraspinal pseudocyst arising as a complication of a chronic spondylolytic defect. A brief review of the related pathophysiology is also included.
DePalma
Michael J
MJ
Department of Physical Medicine and Rehabilitation, The University of Pennsylvania, Philadelphia, PA, USA. depalmamj8@yahoo.com
Strakowski
Jeffrey A
JA
Mandelker
Eiran M
EM
Zerick
William R
WR
D000328:Adult; D003560:Cysts / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D008159:Lumbar Vertebrae / Q000473:pathology; D008297:Male; D011843:Radiculopathy / Q000175:diagnosis* / Q000209:etiology; D013169:Spondylolysis / Q000150:complications