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Michael Cummings, Varun Chowdhry, Hemangini Shah, Jason Back and Gloria A. Kennedy

Primary intracranial meningeal sarcoma is a rare neurological malignancy without strong evidence-based treatment guidelines. The authors describe a boy with primary meningeal sarcoma who symptomatically presented at 10 months of age and was treated with primary resection. The patient had multifocal recurrence approximately 2 years later. Given the location and rapid progression of the disease, the boy was treated with Gamma Knife surgery. He had a complete radiographic response 3 years posttreatment. He attends school full time and enjoys good quality of life. Based on local control and response to radiosurgery, the authors suggest that multifocal meningeal sarcomas not amenable to resection can be effectively managed with stereotactic radiosurgery.

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Peter M. Grossi, Michael J. Ellis, Thomas J. Cummings, Linda L. Gray, Takanori Fukushima and John H. Sampson

✓Cholesterol granulomas (CGs) are benign lesions resulting from an inflammatory reaction to cholesterol and hemosiderin. These masses most often arise within the temporal bone or nasal sinuses; intracerebral CGs are extremely rare. In this report the authors present an unusual case of a CG arising within the lateral ventricle.

The patient presented with transient hemiparesis and numbness. Computed tomography and magnetic resonance imaging demonstrated a cystic partially enhancing midline mass within the right lateral ventricle, expanding the ventricle and displacing the septum pellucidum. The patient underwent an interhemispheric, transcallosal resection of the lesion. Microscopic examination revealed a granulomatous inflammatory lesion containing cholesterol clefts, macrophages, and hemosiderin. Embedded within the granulomatous response were foci of tiny cystlike structures lined by nonciliated flattened cuboidal epithelium, consistent with the diagnosis of CG.

To the authors' knowledge this is the first reported case of CG presenting as an intraventricular mass. The origin of this lesion is unclear, but it may relate to prior traumatic brain injury. The authors describe the presentation, imaging findings, histopathological characteristics, and surgical treatment of this rare lesion and related pathological entities.

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Myles E. Gombert, Sheldon H. Landesman, Michael L. Corrado, Sherman C. Stein, Ellen T. Melvin and Marinella Cummings

✓ Three patients with Staphylococcus epidermidis meningitis associated with cerebrospinal fluid (CSF) shunt devices were treated with a combination of intravenous vancomycin and oral rifampin. Two of the isolates were methicillin-resistant. All patients had a favorable clinical response. Time-kill curves showed that the addition of rifampin to vancomycin resulted in enhanced bactericidal activity against all isolates when compared to either antibiotic alone. This finding suggests that the combination of oral rifampin and intravenous vancomycin may be useful in the treatment of methicillin-resistant and recalcitrant methicillin-sensitive S. epidermidis meningitis associated with CSF shunts. In vitro susceptibility testing should be performed.

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Renee M. Reynolds, Elizabeth Boswell, Christine M. Hulette, Thomas J. Cummings, Michael M. Haglund, Elizabeth Boswell, Christine M. Hulette, Thomas J. Cumm ings and Michael M. Haglund

In this paper the authors describe the rare disorder of diffuse leptomeningeal oligodendrogliomatosis in a patient with an oligodendroglioma of the cauda equina who died suddenly. Reviewing this uncommon pathological entity is important so that it can be recognized and treated appropriately. This young, otherwise healthy woman with initial symptoms of low-back pain had a mass lesion of the cauda equina. During a workup, profound refractory intracranial hypertension suddenly developed despite aggressive surgical and medical intervention. Autopsy revealed a spinal cord oligodendroglioma with diffuse leptomeningeal oligodendrogliomatosis of the brain and spinal cord. Given the unforeseen outcome in this patient, this entity, although rare, should be considered in patients with similar presentations and addressed early to prevent similar outcomes. A review of the details of this case as well as the literature is presented below.