Bloods
FBC (anaemia, haemolysis), CRP (infection), U+E, LFTs (liver disease), bone profile, clotting (liver disease), AFP (HCC),
B12/folate, ferrtin/TIBC (haemachromatosis), ceruloplasmin (Wilson's), a1 antitrypsin (a1 antitrypsin deficiency)
Virology (HBV, HCV)
Immune screen (ANA, ANCA, AMA, SMA, IgM, IgG etc.)
Toxicology screen (paracetamol)
Blood film (malaria)