The test used to diagnose Dubin .lohnson syndrome is-
A prolonged BSP dye excretion test is diagnostic of Dubin Johnson syndrome BSP is a dye which is removed from circulation by the same mechanism as bilirubin. Reference Harsh mohan page no.593
Scrum transaminases
Bromsulphalein test (BSP)
Hippuratc test
Gamma glutamyl transferase level
G.I.T