RT Journal
A1 Altchek M
T1 PSeudoclaudication syndrome
JF JAMA
JO JAMA
YR 1969
FD March 10
VO 207
IS 10
SP 1917
OP 1917
DO 10.1001/jama.1969.03150230131031
UL http://dx.doi.org/10.1001/jama.1969.03150230131031
AB To the Editor:— 
    The term "pseudoclaudication" (206:2477, 1968) was previously used by me in an exhibit at the American Academy of Orthopedic Surgeons Scientific Exhibits, New York, Jan 9-14, 1965, entitled "Unusual Lumbar Myelogram." This exhibit demonstrated three myelograms of degenerative spondylolisthesis at the L4-5 level in patients who had presented with pseudoclaudication spinal syndromes. The exhibit is summarized in the Journal of Bone and Joint Surgery (47A:1083, 1965). Pseudoclaudication syndrome was seen in cases of degenerative spondylolisthesis in which the dural sac is markedly constricted by a spondylolisthesis occurring later in life, secondary to degenerative changes at the posterior facets. In this type of spondylolisthesis, the entire lamina is dragged forward with the body, markedly constricting the dural sac by a boney constriction. The usual type of spondylolisthesis, with a defect in the pars interarticularis, does not show this. This type of constriction, as demonstrated on the