Evaluating HIV-infected patients with headache: who needs computed tomography?

Area of Science:

• Neurology
• Infectious Diseases
• Radiology

Background:

• Headache is a common symptom in patients with Human Immunodeficiency Virus (HIV).
• Distinguishing between benign and serious causes of headache in HIV patients is crucial for appropriate management.
• Intracranial mass lesions can present with headache in immunocompromised individuals.

Purpose of the Study:

• To validate a clinical prediction rule for assessing headache in HIV-infected patients.
• To identify HIV patients at low risk for intracranial mass lesions who may avoid immediate head CT scans.

Main Methods:

• Retrospective analysis of two clinical cohorts of HIV-infected patients presenting with headache.
• Medical records were reviewed for clinical data, including neurological signs, mental status, seizure history, and CD4 lymphocyte counts.
• Patients were risk-stratified into low, intermediate, and high categories for intracranial pathology.

Main Results:

• In a primary care cohort (N=101), only 1% of HIV patients with headache had a treatable intracranial lesion.
• In a CT-assessed cohort (N=364), the rate of abnormalities was 0% in the low-risk group, 9% in the intermediate-risk group, and 21% in the high-risk group.
• Low-risk patients were defined by the absence of focal neurological signs, altered mental status, seizure history, and CD4 counts >200 cells/microL.

Conclusions:

• Most HIV-infected patients experiencing headaches can be managed non-urgently with symptomatic treatment and clinical follow-up.
• A clinical prediction rule incorporating neurological examination and immune status can effectively identify low-risk individuals.
• This approach can help reduce unnecessary neuroimaging in HIV patients with headache.