Cervical syringomyelia associated with occipital meningioma.
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Basilar Artery↗
Biomedical subjects
R Tadmor
Publications and source records attributed to R Tadmor.
Early MR demonstration of spinal metastases in patients with normal radiographs and CT and radionuclide bone scans.
Forty patients with known primary tumor and progressive back pain, suspected of having spinal metastatic disease, underwent magnetic resonance (MR) examinations of the thoracic and lumbosacral spine. Conventional radiographs and CT scans of the spine were all normal. The radionuclide bone scans were equivocal. In 21 patients focal or diffuse vertebral MR abnormalities were detected. In nine patients the lesions were hypointense on T1 sequence, and the same lesions were demonstrated poorly or not at all on T2 and proton density sequences. In eight other patients the bone marrow metastases presented with strong signal intensity on T2 and were poorly or not at all demonstrated on T1 and proton density sequences. In three patients with multiple myeloma, the signal intensity pattern of the vertebrae was diffusely heterogeneous, with alternating small foci of strong and weak signals (a mosaic-like pattern). Following the MR studies, needle biopsy confirmed the malignancy in the 21 patients who had shown abnormalities. No correlation between the type of primary tumor and the signal intensity of the vertebral metastases was shown. Possibly the mosaic pattern shown in three of the multiple myeloma patients represents a special case.
Adult↗
Posttraumatic atlantoaxial rotatory fixation.
Atlantoaxial rotatory fixation is a rare entity occurring during childhood following trauma. A case of an 8-year-old girl with atlantoaxial rotatory fixation is described. Diagnosis was confirmed by computerized tomography, and the patient was treated by C1-C2 posterior fusion.
Atlanto-Axial Joint↗
Advantages of supplementary CT in myelography of intraspinal masses.
Computed tomographic (CT) myelography subsequent to nonionic water-soluble contrast medium myelography has provided additional diagnostic information for evaluating intraspinal mass lesions. In 20 patients thus studied, there were eight intramedullary tumors, eight intradural extramedullary masses, and four extradural neoplasms. In intramedullary tumors CT enabled more precise delineation of the extent and location of expansion of the spinal cord. In intradural and extradural tumors, rotation and compression of the spinal cord as well as bony and paraspinal soft-tissue changes were more accurately demonstrated in the axial plane. When a complete block was present, the greater contrast sensitivity of CT permitted visualization beyond the level of the block. Histologic prediction is not feasible by CT myelography except for hyperlucent lipoma. CT can provide useful supplemental information to conventional metrizamide myelography.
Adolescent↗
Computed tomographic demonstration of choanal atresia.
During a 3-year period, nine girls and two boys (age range, 2 days-13 years) with congenital choanal atresia were evaluated by computed tomography (CT). Other associated congenital anomalies, primarily craniofacial anomalies, were present in six of the 11 patients. In six patients the atresia was bilateral and consisted of both bony and membranous components. Of the five patients with unilateral atresia, the lesions were on the right in three and on the left in two. CT demonstrated the atresia, choanal stenosis, septal deviation, and thickening of the vomer and palatine bone. The ease of CT examination and the high accuracy of the results make it the preferred imaging method for evaluating choanal atresia.
Adolescent↗