Faculty Bibliography

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.

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.