Degenerative spondylolisthesis (pseudospondylolisthesis) is a degenerative disorder of the intervertebral motion segment. It can be divided into two types: forward subluxation and backward subluxation. Forward subluxation is primarily a disease of the posterior joints and is found most commonly at L4/5. Retrolisthesis is a primary disorder of the disc space and is noted more commonly at L3/4. This paper reviews the CT findings in 150 patients with degenerative forward and backward subluxation. Proper evaluation of these disorders is extremely important because of the frequency of severe symptomatic spinal stenosis or foraminal encroachment.

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Microangiographic anatomy of the cat's eye.

The microangiographic anatomy of the cat's eye is presented. The characteristic vascular pattern of each of the three distinct circulations, retinal choroidal, and ciliary is described and illustrated.

Angiography↗

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In vivo angiography of the ciliary circulation in the rabbit: an experimental model.

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Angiography↗

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CT multiplanar reconstruction in 253 cases of lumbar spondylolysis.

Two hundred fifty-three patients with lumbar pars interarticularis defects were studied by multiplanar high-resolution computed tomographic scanning (CT/MPR). Two hundred thirty patients had one or more pars defects at L5, 21 at L4, and two at L3. Within this group of patients, 21% had more than 5 mm of disk bulge or herniation, 34% had foraminal encroachment, and 34% had indentation on the neural canal from soft-tissue or bony callus formation.

Humans↗

PubMedDate not supplied

High-resolution computerized tomography and nuclear bone scanning in the diagnosis of postoperative stress fractures of the mandible: a clinical report.

Root-form titanium dental implants are the treatment of choice for many partially and totally edentulous patients. The overall success rate is greater than 95%. Postoperative pain is usually the result of infection. This report presents two cases involving a sudden onset of jaw pain. Computerized tomographic scanning revealed that the pain was caused by stress fracture of the mandible.

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