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Kent Sauter, Howard H. Kaufman, Stephen M. Bloomfield, Sandi Cline and Daniel Banks

✓ The case is reported of a 45-year-old woman who was being treated for chronic back and right leg pain with intrathecal morphine administered via a subcutaneous continuous-infusion device. She received an accidental 450-mg bolus injection of morphine intrathecally and developed hypertension, status epilepticus, intracerebral hemorrhage, and respiratory failure. Treatment with continuous intravenous naloxone infusion, lumbar catheter drainage of cerebrospinal fluid, and control of hypertension and status epilepticus resulted in an excellent outcome with return to neurological baseline. Care providers who refill pump reservoirs with morphine must be knowledgeable about these devices and the life-threatening consequences associated with errors in refilling them. This case describes the complications and successful treatment of high-dose intrathecal morphine overdose.

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Patrick R. Yassini, Kent Sauter, Sydney S. Schochet, Howard H. Kaufman and Stephen M. Bloomfield

✓ Hypertrophic nerve lesions displaying onion-bulb cellular formations are quite rare in the absence of a generalized hypertrophic neuropathy. The isolated peripheral nerve lesion has been termed “localized hypertrophic mononeuropathy” (LHN), and fewer than 30 cases of this condition have been reported. Very little is known regarding the etiology and the natural course of this rare disorder. A unique case of LHN afflicting spinal roots in association with a sacral meningocele is reported with a brief review of the relevant literature. The unique features of this case not only reveal a variable clinical presentation of the disease but also support the theory that LHN may be a localized reaction to nerve trauma or entrapment.

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Deborah Blumenthal, Mariana Berho, Stephen Bloomfield, Sydney S. Schochet Jr. and Howard H. Kaufman

✓ This paper reports a childhood meningioma in association with meningioangiomatosis. The patient was an 11-month-old baby boy who presented with a left focal seizure. He had no stigmata of neurofibromatosis. Computerized tomography and magnetic resonance imaging revealed an extra-axial, contrast-enhancing mass in the interhemispheric fissure which indented the right frontal lobe. The tumor was totally removed. Microscopically, the lesion was a fibrous and transitional meningioma with foci of necrosis and scattered mitotic figures. The adherent neural parenchyma showed the histological features of meningioangiomatosis. It is concluded that meningioangiomatosis may accompany childhood meningiomas more often than is generally appreciated.