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Christopher A Robinson

Publications and source records attributed to Christopher A Robinson.

5 recordsLinked to original sources
PubMed2006

Rasmussen's encephalitis in a 58-year-old female: still a variant?

BACKGROUND: We report the case of a 58-year-old female with clinical, radiological, and histopathological evidence of Rasmussen's encephalitis, representing the oldest confirmed case to date. CASE SUMMARY: The patient presented with complex partial seizures characterized by numbness of the left face and staring spells. These progressed to a state of epilepsia partialis continua with jerking of the left face, as well as severe cognitive impairment and loss of all communication. The patient responded well to Intravenous Immunoglobulin (IVIG) therapy despite early complications and with ongoing treatment is living independently with minimal cognitive impairment. CONCLUSIONS: This represents the oldest confirmed case of Rasmussen's encephalitis and suggests that this diagnosis should be considered in patients of any age with an appropriate clinical picture. We recommend IVIG as a first line therapy for adult cases of Rasmussen's encephalitis.

Adolescent↗
PubMed2005

Pseudoglandular elements in schwannomas.

CONTEXT: Uncommon examples of schwannomas are seen in which a coexisting glandular component is present. The pseudoglandular schwannoma is a relatively recently described variant in which cystic spaces are lined by pseudocolumnar or cuboidal-like neoplastic Schwann cells exhibiting an epithelial-like appearance. OBJECTIVES: To determine the incidence of pseudoglandular elements in schwannomas, to describe the variable morphology of the schwannomas that may contain pseudoglandular elements, and to discuss the potential mechanisms of development and biological significance of these elements. DESIGN: We screened 202 schwannomas from any anatomic site for the presence of pseudoglandular elements and examined these with light microscopy, immunohistochemistry, and electron microscopy. RESULTS: Sixteen (7.9%) of the schwannomas contained pseudoglandular elements, which ranged from poorly to well organized in appearance and which were found in schwannomas exhibiting a wide range of morphologic appearances. The Schwann cell nature of the cells composing these elements was apparent both immunohistochemically and ultrastructurally. The frequency of proliferative activity within these elements was no greater than that observed throughout the remainder of the respective schwannomas. CONCLUSIONS: Our observations suggest that, rather than representing a distinct phenotypic schwannoma variant, pseudoglandular elements likely arise as a response to a degenerative phenomenon, perhaps reflecting the propensity that the Schwann cell has to palisade formation. Such elements may be found within a variety of schwannoma variants and do not appear to possess a unique growth potential.

Biomarkers, Tumor↗
PubMed2004

Essential tremor course and disability: A clinicopathologic study of 20 cases.

OBJECTIVE: To correlate autopsy findings with the clinical course and disability profile in clinically diagnosed longitudinally followed autopsied essential tremor (ET) patients. METHODS: All ET patients followed by one neurologist between 1970 and 2001 who came to autopsy were included. Clinical features and disability were recorded prospectively. Autopsy studies were performed by a qualified neuropathologist. RESULTS: Twenty cases (10 men and 10 women) had ET onset between childhood and age 68 (median 46.5 years). Six cases had additional features of Parkinson syndrome (PS), with presence of bradykinesia, rigidity, and rest tremor (RT). These included progressive supranuclear palsy (PSP; n = 2), drug-induced parkinsonism (n = 2), idiopathic Parkinson disease (PD; n = 1), and basal ganglia status cribrosus (n = 1). Of the remaining 14 ET cases, 6 had additional RT but no bradykinesia or rigidity. Ten of these 14 (71%) reported physical disability. Eleven of the 14 (79%) had only upper limb (UL) tremor at onset, and 8 of these 11 (73%) had subsequent cranial extension of tremor. Two patients clinically had mild cerebellar ataxia but no cerebellar histologic abnormality. There was no consistent brain pathology in the ET or ET + RT cases. CONCLUSIONS: UL tremor was the most common onset, which often progressed to the cranial musculature. Functional disability and psychological distress were common in these patients. Functional disability was related to the UL tremor. Six of 20 (30%) had additional features of PS. Six of the remaining 14 (43%) had ET and RT; there was no identifiable pathology in these cases. The risk of PD in ET cases was comparable with that in the general population. PSP in two cases was incidental comorbidity.

Adrenergic beta-Antagonists↗