Complicated Caroli disease

Fever of unknown origin (FUO), refers to a condition in which the patient has an elevated temperature (fever) but despite investigations by a physician no explanation has been found.If the cause is found it is usually a diagnosis of exclusion, that is, by eliminating all possibilities until only one explanation remains, and taking this as the correct one. Causes Extrapulmonary tuberculosis is the most frequent cause of FUO.Drug-induced hyperthermia, as the sole symptom of an adverse drug reaction, should always be considered. [Source: Wikipedia ]