Discussion The radiographic appearance of a retroisthmic cleft was first described by
Brocher [3], who named it and distinguished it from eccentrically located spina bifida …

The retroisthmic cleft is a rarely diagnosed defect in the lamina of the lumbar spine. It has
always been considered a congenital anomaly. This is the first report we are aware of …

Low back pain developed in a 44-year-old woman with a history of rheumatoid arthritis.
Radiographs of the lumbar spine revealed bilateral pedicle defects at L-3, L-4, and L-5, with …

This article describes the scintigraphic appearance of both a symptomatic and asymptomatic
retroisthmic cleft in two athletes with low back pain. This lesion, which involves the lamina, is …

A 23-year-old man presented with a 12-month history of low back pain with right sciatica.
There was no history of trauma, strenuous sports activities, or previous low back problems …

Besides the rather common cleft in the pars in-terarticularis there are rare clefts located in
the pedicle (retrosomatic cleft) and the lamina (retroisthmic cleft). We reviewed four cases of …

A case of bilateral clefts in the pedicles of the L1 vertebra, diagnosed by computed
tomography, is presented. The differentiation from other clefts located laterally in the neural …

DISCUSSION Paget's disease usually involves more than one bone ofthe skele-ton. The
introduction of bone scanning confirmed that the inci-dence of monostotic Paget's disease is …

Radiology 139: 72, April 1981 ON lateral films of the lumbar spine, an apparent defect in the
pars interarticulanis may resemble a true defect (spondy-lolysis) to the untrained eye (Figs. 1 …

We report a 5-year-old male child with absent rib, hemivertebra, superior lumbar hernia
(features of lumbocostovertebral syndrome) and posterior spinal dysraphism, which is the …