Table 2.

Association between hepatitis C virus (HCV) infection and diseases

Established association*

Mixed cryoglobulinaemia (MC) (complete or incomplete MC syndrome)

Porphyria cutanea tarda

Significant association†

Autoimmune hepatitis

B cell non Hodgkin's lymphoma

Monoclonal gammopathies

Possible association‡

Chronic polyarthritis

Sicca syndrome

Lung fibrosis

Polyarteritis nodosa

Poly/dermatomyositis

Thyroiditis/thyroid cancer

Diabetes mellitus

Lichen planus

Mooren corneal ulcers

*HCV infection in 80–90% of cases; †HCV infection in a significant percentage of patients when compared with the general population; suggested but unconfirmed association.