Differential diagnosis of fatigue and fever are :
-inflammatory bowel disease
-influenza
-flu like syndrome
-mononucleosis
-lymphoma
-leukemia
-primary or metastatic liver carcinoma
-renal cell carcinoma
-systemic lupus erythematosus
-rheumatoid arthritis
-tuberculosis
-lyme disease
-HIV
-endocarditis
-viral hepatitis
-inflammatory bowel disease
-influenza
-flu like syndrome
-mononucleosis
-lymphoma
-leukemia
-primary or metastatic liver carcinoma
-renal cell carcinoma
-systemic lupus erythematosus
-rheumatoid arthritis
-tuberculosis
-lyme disease
-HIV
-endocarditis
-viral hepatitis