Lyme borreliosis-associated encephalopathy

Borrelia burgdorferi infection (Lyme disease) is frequently accompanied by CNS dysfunction. Particularly common is a mild confusional state, the mechanism of which is unknown. Since CNS infection with B burgdorferi is usually accompanied by intrathecal synthesis of specific antibody, we studied CSF in 73 patients referred for presumed CNS Lyme, manifested primarily as this confusional state. Of 30 seropositive patients evaluated, only 5 had intrathecal antibody production. Seven seronegative patients had positive cell-mediated immune responses to B burgdorferi in the peripheral blood; none had antibody production in the CSF. Of the remaining 36 patients referred with this diagnosis despite negative serologic studies, none had compelling evidence of CNS infection by this criterion. We conclude that CNS infection with B burgdorferi does occur in a small proportion of seropositive patients with this confusional state but is extremely uncommon among seronegative individuals with this clinical presentation.

Mixed transcortical aphasia without anatomic isolation of the speech area

We report two patients with mixed transcortical aphasia following left frontal lobe infarctions. Although there was no evidence of anatomic isolation of the speech area on computed tomograms or magnetic resonance imaging scans, single-photon emission computed tomography in one case demonstrated diminished blood flow over the left parietal convexity suggestive of "functional isolation" of the posterior perisylvian language zone.

The fatigue severity scale. Application to patients with multiple sclerosis and systemic lupus erythematosus

Fatigue is a prominent disabling symptom in a variety of medical and neurologic disorders. To facilitate research in this area, we developed a fatigue severity scale, subjected it to tests of internal consistency and validity, and used it to compare fatigue in two chronic conditions: systemic lupus erythematosus and multiple sclerosis. Administration of the fatigue severity scale to 25 patients with multiple sclerosis, 29 patients with systemic lupus erythematosus, and 20 healthy adults revealed that the fatigue severity scale was internally consistent, correlated well with visual analogue measures, clearly differentiated controls from patients, and could detect clinically predicted changes in fatigue over time. Fatigue had a greater deleterious impact on daily living in patients with multiple sclerosis and systemic lupus erythematosus compared with controls. The results further showed that fatigue was largely independent of self-reported depressive symptoms and that several characteristics could differentiate fatigue that accompanies multiple sclerosis from fatigue that accompanies systemic lupus erythematosus. This study demonstrates (1) the clinical and research applications of a scale that measures fatigue severity and (2) helps to identify features that distinguish fatigue between two chronic medical disorders.

Fatigue in multiple sclerosis

Fatigue is a frequent symptom in multiple sclerosis (MS) that can interfere with a patient's daily functioning. The cause of MS fatigue, its clinical characteristics, and its relationship to other symptoms remain poorly understood. Structured interviews were conducted with 32 patients with MS and 33 normal healthy adults. Fatigue proved to be both more frequent and more severe among the patients with MS. Multiple sclerosis fatigue was unrelated to either depression or global impairment. Multiple sclerosis fatigue appears to be a distinct clinical entity, often disabling, that can be distinguished from normal fatigue, affective disturbance, and neurologic impairment.

Prisoners as medical patients

Nonpsychiatric and nonobstetrical principal diagnoses of 527 prison inmates discharged in 1981 from one referral hospital were reviewed. Male prisoners had the following discharge diagnoses more frequently than an age-matched and sex-matched sample of the general population: lymphadenopathy, viral hepatitis, foreign body insertion into the gastrointestinal tract, dental caries, and pulmonary tuberculosis. Some differences may be due to lifestyles preceding incarceration, others may result from conditions of the prison environment.

Progressive multifocal leukoencephalopathy: clinical and radiographic features

Between April 1982 and March 1984 7 pathologically confirmed cases of progressive multifocal leukoencephalopathy (PML) were diagnosed at our institution. Only 1 case had been seen in the preceding twenty years. Four patients had acquired immunodeficiency syndrome (AIDS). The others had chronic lymphocytic leukemia, Hodgkin's lymphoma, and systemic lupus erythematosus. All patients presented with progressive neurological deficits. In most, the initial computed tomographic (CT) scan was disproportionately less abnormal than the clinical findings. In 5 patients the first CT scan revealed hypodensities of the cerebral white matter which lacked mass effect and did not enhance with contrast agent. The lesions were observed to enlarge progressively on CT scans but often lagged behind the rate of clinical evolution. Although 3 patients were treated with cytosine arabinoside, none improved. PML had similar clinical, radiographic, and pathological features in the AIDS and non-AIDs patients. Of 79 AIDS patients cared for at our institution between December 1979 and December 1983, 3.8% had PML. PML should be suspected in AIDS patients in the presence of the characteristic CT features, especially when CT-clinical dissociation occurs.

Acquired immunodeficiency syndrome in male prisoners. New insights into an emerging syndrome

Between September 1981 and June 1982, the acquired immunodeficiency syndrome and Pneumocystis carinii pneumonia were diagnosed in seven previously healthy young men incarcerated for 5 to 38 months in New York State correctional facilities. All seven patients were anergic, six were lymphopenic, and all developed oral candidiasis. Immunologic evaluation in vitro showed profound defects in cellular immune function in patients tested, with inversion of the normal ratio of helper to suppressor T-cell populations in four of five patients studied. No underlying immunosuppressive disorder was found in any patient, including three patients who had postmortem examinations. Based on these cases, the incidence of this syndrome among inmates of New York State correctional facilities is estimated to be at least 20 out of 100 000 per year. None of the inmates was homosexual but all had used intravenous drugs extensively before incarceration. If intravenous drug use is a cause of the syndrome, then the epidemiologic findings of this study suggest a prolonged incubation period (mean, 14.6 months) before development of serious opportunistic infection. Recognition that certain prisoners are at high risk for the acquired immunodeficiency syndrome has important implications for the prison health-care system.