Use of brain biopsy for diagnostic evaluation of patients with suspected herpes simplex encephalitis: a statistical model and its clinical implications
Article Abstract:
Herpes simplex encephalitis (HSE) is an infection of the brain that is accurately diagnosed by clinical symptoms. While HSE has frequently been fatal in the past, safe and effective treatment now exists. Despite the relative ease of diagnosis and safety of treatment, it remains controversial whether there is a need to confirm the diagnosis of HSE by brain biopsy (taking a sample of brain tissue to test for the presence of HSE) before treatment is offered or initiated. Since 1972, the Collaborative Antiviral Study Group of the National Institute of Allergy and Infectious Diseases (NIAID) has evaluated patients with HSE. The value of brain biopsy for diagnosis has been established as one result of the group's work. It also became apparent that the use of brain biopsy allowed doctors to distinguish between HSE and other treatable conditions that may be similar to HSE. Using the results of the NIAID studies, data was analyzed mathematically to determine the value of brain biopsy in patients suspected of suffering from HSE. Patients under Strategy I had a brain biopsy and were treated with acyclovir (ACV; a recognized therapy for HSE). Under strategy II, patients were given ACV only. A mathematical model suggests that patients under strategy I will have a greater six-month survival rate than patients under Strategy II. The authors recommend that brain biopsy be the diagnostic approach of choice for most patients suspected of having HSE. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: Journal of Infectious Diseases
Subject: Health
ISSN: 0022-1899
Year: 1991
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Diseases that mimic herpes simplex encephalitis: diagnosis, presentation, and outcome
Article Abstract:
The diagnosis of diseaes which mimic herpes simplex encephalitis is studied. A total of 432 patients had tissue samples taken from the brain to test for herpes simplex encephalitis. Three groups of patients were identified. The first group (195 patients) had a diagnosis of herpes simplex encephalitis proven by their brain tissue sample. The second group (95 patients) had diseases that were identified as other than herpes simplex encephalitis; 38 of these patients had treatable diseases, 40 had non-treatable but diagnosed viral infection, and 17 had identified diseases that were neither treatable nor caused by viruses. The third group of 142 people could not be diagnosed even after the brain tissue sample. When these patients came to medical attention their symptoms and appearances were similar. The patients most likely to have full recoveries were those in the subgroup with nontreatable but diagnosed viral infections.
Publication Name: JAMA, The Journal of the American Medical Association
Subject: Health
ISSN: 0098-7484
Year: 1989
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Acyclovir with and without prednisone for the treatment of herpes zoster: a randomized, placebo-controlled trial
Article Abstract:
A combination of acyclovir and prednisone treatment appears to be effective in accelerating the recovery process in otherwise healthy patients with shingles. Two hundred eight patients with newly developed shingles flare-ups were randomly assigned to take either acyclovir plus prednisone, prednisone plus placebo, acyclovir plus placebo, or two placebos for 21 days. Patients taking both drugs experienced faster healing, a restoration of normal sleep and activity patterns and shorter periods of pain than the other groups.
Publication Name: Annals of Internal Medicine
Subject: Health
ISSN: 0003-4819
Year: 1996
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