Etiologies of FUo 口 Abscess Usually located in abdomen or pelvis Secondary to appendicitis or diverticulitis Pyogenic liver abscess usually follow biliary tract dis /abd. Suppuration Amoebic liver abscess is similar to pyogenic - amoebic serology is positive >95% of cases Splenic abscess is usually secondary to hematogenous seeding a Perinephric or renal abscess is usually secondary to UTIEtiologies of FUO Abscess:  Usually located in abdomen or pelvis.  Secondary to appendicitis or diverticulitis.  Pyogenic liver abscess usually follow biliary tract dis./abd. Suppuration.  Amoebic liver abscess is similar to pyogenic → amoebic serology is positive > 95% of cases.  Splenic abscess is usually secondary to hematogenous seeding.  Perinephric or renal abscess is usually secondary to UTI