الفهرس 
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Abstract
Choledico-lithiasis is the most COMMON cause of
obstruct:. ve j au..TJ.dice and extrahepatic cholestasis in many
reported series {Pantes et al., 1986).
Ultrasound is the modality of choice for the diagnosis
of chole-lithiasis, and for the evaluation of intra and
extra hepatic biliary tree in patient with j au..”’l.dice. But
its role in the diagnosis of choledocholithiasis is less
cer’”:ain.
E:ld.csccpic retrog~acie cholangiogo-pa:nc::-ea~ograpt.y :.s
~he diagnostic standard for comparison, is more se~sitive in
the diag:1osis of choledocho-lithiasis, ultra sound was not
{Grosset al., 1991).
Almost all stones are formed in the gall bladder, But
occasionally stone :forrn.a::ion may occur within tl1e ma:_n Ducts
or intrahepatic calculi. Radiology is the most valuable
met~od of i::vestigation, E.R.C.P is recorr.mended in early
phase be~ause of its ~~ghly se~sitive diagnostic value and
therapeu~ic potential (Summerfield J.A., 1988).