Clinical correlates of human immunodeficiency virus (HIV)-related immunosuppression

Opportunistic infections and cancers, collectively referred to as opportunistic diseases (OD), occur with increasing frequency as HIV-related immunosuppression advances. Knowledge of an individual's degree of immunosuppression, as measured by his or her CD4 cell count, will assist a clinician in constructing a differential diagnosis to account for a given clinical presentation. Likewise, the correlation of an individual's immunosuppression with their symptoms will enable a radiologist to assist a clinician in determining which radiological studies are most likely to lead to a diagnosis.