Osteitis condensans ilii, including its resolution.
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Adult↗
Biomedical subjects
Y Numaguchi
Publications and source records attributed to Y Numaguchi.
[Duplication of the gall bladder; a report of two cases].
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Cholecystography↗
Experimental study on the detectability of liver tumor by scanning, with special reference to gamma-energy of the nuclides.
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Gold Isotopes↗
Cerebral venous angioma and a varix: a rare combination.
A patient with a rare combination of cerebral venous angioma and a varix is reported. Only two such cases have been previously reported in the literature. The importance of being aware of the association of two such vascular malformations in the same patient is underscored.
Brain Neoplasms↗
Superior sagittal sinus thrombosis with intracerebral hematoma.
Intracranial hematoma secondary to superior sagittal sinus thrombosis is a well described, but rare event. We present a case of interval resolution of a intracerebral hematoma in a patient with thrombosis of the sagittal sinus.
Adult↗
Magnetic resonance imaging of post-surgical pseudomeningocele.
Three cases of post-surgical pseudomeningocele (PSPM) are presented. MR imaging proved useful in diagnosing PSPM because, in the orthogonal planes, it demonstrated precisely the leakage site and the extent of the PSPM. MR imaging was also useful in demonstrating the presence of communication between the PSPM and the subarachnoid space.
Adult↗
Magnetic resonance imaging of a high cervical intradural lipoma.
A case of intradural spinal lipoma, rarely seen in the high cervical region, is described. Extension into the posterior fossa is not infrequent with these rare tumors. Magnetic resonance imaging clearly showed the longitudinal dimension of the tumor as well as the infiltrative extension into the spinal cord without any invasive procedure.
Adult↗
Extradural epidermoid cyst occluding the transverse sinus: a case report.
A case of an epidermoid cyst obstructing the transverse sinus is presented. The preoperative radiologic evaluation comprised CT, MR Imaging, and cerebral angiogram. The discussion includes the relative value of each test as part of the preoperative evaluation and the differential diagnosis of lateral sinus occlusion.
Bone Diseases↗
Osteochondroma of the cervical spine. MR findings.
We report two cases of osteochondroma in the region of the cervical spine. The magnetic resonance (MR) images well demonstrated the relationship of the tumor, the spinal cord, and adjacent soft tissue, but correct diagnosis by MR imaging was difficult in one patient due to unusual gadolinium enhancement. Computed tomography played an important role in these patients by demonstrating the exact origin and nature of the tumor.
Adult↗
Vertebral body metastasis of glioblastoma multiforme with epidural mass formation. Contrast-enhanced MRI study.
A 35-year-old woman with left frontoparietal glioblastoma was subtotally resected twice and 1 year later demonstrated extracranial metastasis. Magnetic resonance imaging (MRI) demonstrated metastasis to the first thoracic vertebral body with epidural and paravertebral extension. Bone scintigrams of the spine appeared normal. The mechanisms and radiological findings of the extracranial metastasis of an astrocytic glioma are reviewed.
Adult↗
Diffusion-weighted echo-planar MR imaging: clinical applications and pitfalls -- a pictorial essay.
Diffusion-weighted imaging (DWI) provides unique information about various pathological changes of the brain. DWI is sensitive for the detection of hyperacute infarcts, and useful in distinguishing acute or subacute infarcts from chronic infarcts. DWI is useful in differentiating cytotoxic edema from vasogenic or interstitial edema, which may help to determine prognosis. DWI is useful in differentiating cystic or necrotic tumors from abscesses or epidermoids. DWI can discriminate nonenhanced tumor infiltration from vasogenic edema, and differentiate dysmyelination from demyelination.
Brain Diseases↗
Value of CT angiography in the evaluation of a peripheral anterior inferior cerebellar artery aneurysm: case report.
We report a case of a peripheral anterior inferior cerebellar artery (AICA) aneurysm in a 66-year-old woman. Computed tomography angiography (CTA) demonstrated a saccular aneurysm in the left AICA. A subsequent vertebral digital subtraction angiography using our standard injection technique failed to demonstrate the aneurysm. However, the aneurysm was visualized on a follow-up injection performed with an increased contrast dose and injection rate. CTA proved to be critical in the detection of this aneurysm which could have been easily overlooked on a conventional angiogram.
Aged↗
Computed tomography and MR imaging of thalamic neuroepithelial cysts.
Neuroepithelial cysts of the CNS are rare. Two cases of noncolloid neuroepithelial cysts of the thalamus are reported. Computed tomography and magnetic resonance imaging aided in ascertaining the nature of these cysts.
Adult↗
Bleeding patterns in ruptured posterior fossa aneurysms: a CT study.
Computed tomography of the brains in 20 patients with acute rupture of posterior fossa aneurysms was reviewed and analyzed retrospectively. Findings were compared with those from 44 cases described in the literature and with the findings in ruptured supratentorial aneurysms. Extravasated blood was observed in 19 of 20 patients (95%); intraventricular hemorrhage (IVH) in 17 of 20 (85%); and subarachnoid hemorrhage (SAH) in 13 of 20 (65%). These values were significantly higher than those previously reported and suggest that, during the acute phase of rupture, extravasated blood may be detected with the same frequency in either infratentorial or supratentorial ruptured aneurysms. Subarachnoid hemorrhage was accompanied by IVH, prominent in the fourth ventricle and without intraparenchymal hematoma, in 11 patients (55%). This pattern is highly suggestive of ruptured posterior fossa aneurysms. Intraventricular hemorrhage without SAH was noted in five patients (25%) and specifically represented ruptured posterior inferior cerebellar artery aneurysms. Subarachnoid hemorrhage without IVH was noted in only two patients (10%).
Adult↗
Initial experience with helical CT and 3D reconstruction in therapeutic planning of cerebral AVMs: comparison with 3D time-of-flight MRA and digital subtraction angiography.
PURPOSE: We report our initial experience with helical CT and CT angiography (CTA) in evaluating cerebral arteriovenous malformations (AVMs) in comparison with time-of-flight MR angiography (MRA) and digital subtraction angiography (DSA). METHOD: Twelve AVMs were studied with CTA, non-gadolinium-enhanced MRA, and DSA. Reconstructed images were obtained in three display methods (maximum intensity projection, shaded surface black and white, shaded surface color). Shaded surface color display was obtained by assigning different colors to vessels and "presumed" nidus. The number of feeding arteries and draining veins associated with each AVM was independently counted in each modality. The relative ease of depicting the nidus and vessels was also determined in each display method. AVM nidus dimensions were measured on CTA and MRA source images and interobserver differences were compared. RESULTS: CTA-reconstructed images depicted more veins but fewer arteries than MRA. Shaded-surface color displays best delineated vessels and nidus. Nidus dimension measurement was possible on CTA in all AVMs but impossible on MRA in four AVMs due to interference by methemoglobin (three AVMs) and phase artifact (one AVM). The interobserver difference in nidus dimension as measured on CTA was significantly smaller than that on MRA. CONCLUSION: Reconstructed CTA images and CTA source images seem to be valuable adjuncts or alternatives to MRA.
Adolescent↗
Central brain herniation secondary to juvenile diabetic ketoacidosis.
We present the CT, MR, and autopsy findings of central brain herniation in a 9-year-old boy undergoing treatment for diabetic ketoacidosis (DKA). Severe cerebral edema resulting in central brain herniation is an uncommon complication of the treatment of DKA but carries with it high morbidity and mortality. Radiologic imaging and autopsy findings in this case revealed striking infarctions of central brain structures.
Brain↗
Wide anulus rent appearance on axial MR imaging: a sign of postdiskectomy recurrent disk herniation.
A band of high intensity extending from a hyperintense nucleus pulposus at the center of a lumbar disk toward the thecal sac is occasionally encountered on axial MR images with a long TR technique. A retrospective review of 195 patients who previously underwent surgery of the lumbar spine revealed eight instances of this wide anulus rent appearance. Four were confirmed to have recurrent disk herniation at re-operation, and the other four were clinically strongly suggestive. Wide anulus rent appearance is a useful sign of a postdiskectomy recurrent disk herniation.
Adult↗
The diagnosis of herniated intervertebral disks with MR imaging: a comparison of gradient-refocused-echo and spin-echo pulse sequences.
Axial MR images of 65 lumbar disks with herniated nucleus pulposus imaged by gradient-refocused-echo (GRE) and spin-echo (SE) MR pulse sequences of 200-400/15 with a flip angle of 15-30 degrees was selected as optimal because of its high signal-to-noise ratio and good contrast between CSF, nucleus pulposus, and bone. The GRE technique was confirmed to be more sensitive in detecting prolapsed disks than the SE technique, but was less sensitive in demonstrating extruded disks. The combination of axial GRE and SE resulted in high detectability of herniated nucleus pulposus on axial MR images. Our results suggest that the GRE technique is an important adjunct to SE imaging in studying herniated nucleus pulposus.
Humans↗