Depression, HIV dementia, delirium, posttraumatic stress disorder (or all of the above).

A 29-year-old single Puerto Rican woman with AIDS was admitted to the Medical Service for pneumonia, seen by the Psychiatric Consultation Service, an eventually transferred to the Inpatient Psychiatric Unit with several possible psychiatric diagnoses including major depression, HIV dementia, delirium, and posttraumatic stress disorder. These possibly coexisting and interacting syndromes are discussed by three psychiatrists, one of whom is also a board-certified neurologist. This case illustrates the combined contribution of organic and psychological factor to complex behavioral disorders, which are increasingly common in HIV infection.