Safety of cerebral angiography and neuroendovascular therapy in patients with chronic kidney disease.

Purpose: Contrast-induced nephropathy is a common clinical concern in patients undergoing neuroendovascular procedures, especially in those with pre-existent kidney disease. We aimed to define the incidence of contrast-induced nephropathy in these high-risk patients in our practice.

Methods: We analyzed data retrospectively from patients undergoing neuroendovascular procedures at two academic medical centers over a 4-year period.

Metachronous, multicentric giant cell tumor of the sphenoid bone with histologic, CT, MR imaging, and positron-emission tomography/CT correlation.

Giant cell tumor (GCT) of the sphenoid bone is a relatively rare entity and metachronous multicentric GCT of the sphenoid is even rarer; we are aware of only 3 previous cases in the literature. We describe here a tumor of the sphenoid bone that was identified 15 years after multiple resections of a GCT of the left inferior pubic ramus. Correlation is made between the histopathologic findings, MR imaging of the brain, CT of the head, and fusion positron-emission tomography (PET)/CT scan performed with fluorine-18 fluoro-2-deoxy-D-glucose (18F-FDG).

Reversible findings of restricted diffusion in 5-fluorouracil neurotoxicity.

A 35-year-old woman presented with neurotoxicity correlated to an i.v. regimen of 5-fluorouracil as episodes of acute confusional state and abnormalities of symmetrically restricted diffusion in the periventricular white matter and corpus callosum.

3-Tesla intraoperative MR imaging for neurosurgery.

Intraoperative magnetic resonance (MR) image-guided neurosurgery has been performed since 1994. Using a 1.5-Tesla (T) intraoperative MR imaging system, we have performed more than 750 interventional procedures.

Intracranial metastasis via transplacental (vertical) transmission of maternal small cell lung cancer to fetus: CT and MRI findings.

We present the computed tomography (CT) and magnetic resonance imaging (MRI) findings of brain metastases in an unusual case of a premature, 33-week gestational age neonate who was emergently delivered from a mother suspected of having lung cancer according to imaging performed during the third trimester of pregnancy. Owing to the presence of placental metastases noted after delivery, the fetus had initial screening with brain MRI and chest/abdomen CT as well as serial screening imaging studies during the first 5 months of life, all of which were apparently normal. However, serial examinations eventually revealed a cerebellar lesion that significantly improved after chemotherapy but recurred and enlarged within a few months.

Mirror-image reversal of coronal computed tomography scans.

Objectives/hypothesis: Mirror-image reversal of coronal computed tomography (CT) scans can be a significant problem in patient care, potentially leading to wrong-sided surgery and malpractice suits. There is no literature describing the problem of mirror-image reversal of coronal CT scans. Generally, medical errors are not widely published: however, with the emphasis on reduction of errors in medicine, this topic should be openly discussed.

Gadolinium enhancement of spinal subdural collection on magnetic resonance imaging after lumbar puncture.

We report a 35-year-old male with an unusual contrast-enhancing sterile spinal subdural collection on magnetic resonance imaging (MRI), apparently occurring as a complication of lumbar puncture. Follow-up MRI after 4 weeks demonstrated spontaneous resolution of the collection without intervening treatment.

Subglottic laryngeal paraganglioma.

Objectives: To review the clinical and pathological picture of laryngeal paragangliomas and compare laryngeal paragangliomas with the three other types of laryngeal neuroendocrine neoplasms.

Study Design: The study presents a case review of a patient with a subglottic laryngeal paraganglioma treated at our institution, with a literature review of the laryngeal neuroendocrine neoplasms. Included is a review of all four neuroendocrine neoplasms, taking a close look at a comparison between laryngeal paragangliomas and atypical carcinoids tumors.