Table 2.

Diagnostic work flow prior to surgery

Ref.	CT	MRI	ERCP	Ultrasound	Others
Ammori et al[27]	Yes	Yes	100%	Yes	No data
De Kerckhove et al[19]	Yes	Yes	Yes	Yes	Percutaneous cholangiography
Kassahun et al[21]	100%	16.2%	83.9%	100%	No data
Habib et al[17]	No data	No data	No data	No data	No data
Bockhorn et al[30]	100%	No data	92%	100%	No data
Millwala et al[5]	No data	No data	No data	No data	No data
Ulrich et al[3]	Yes	Yes	Yes	Yes	Percutaneous cholangiography
Hori et al[24]	No data	No data	No data	No data	No data
Lendoire et al[13]	Yes	Yes	Yes	Yes	Percutaneous cholangiography
Mabrut et al[20]	No data	74.7%	27.7%	No data	No data
Moslim et al[12]	No data	No data	No data	No data	No data
Fahrner et al[25]	No data	No data	No data	No data	No data

Percentages given indicate frequency of diagnostic tool within the study. CT: Computed tomography; MRI: Magnetic resonance imaging; ERCP: Endoscopic retrograde cholangiopancreatography.