Common Symptoms Table 2–7.

Table 2–7. Differential diagnosis of fever and hyperthermia.

Fever—common causes
Infections: bacterial, viral, rickettsial, fungal, parasitic Autoimmune diseases
Central nervous system disease, including head trauma and mass lesions
Malignant disease, especially renal cell carcinoma, primary or metastatic liver cancer, leukemia, and lymphoma

Fever—less common causes
Cardiovascular diseases, including myocardial infarction, thrombophlebitis, and pulmonary embolism
Gastrointestinal diseases, including inflammatory bowel disease, alcoholic hepatitis, and granulomatous hepatitis
Miscellaneous diseases, including drug fever, sarcoidosis, familial Mediterranean fever, tissue injury, hematoma, and factitious fever

Hyperthermia
Peripheral thermoregulatory disorders, including heat stroke, malignant hyperthermia of anesthesia, and malignant neuroleptic syndrome