الفهرس 
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Abstract
During the peroid from January 1988 to June 1990. 150 patients with biliary Iithiasis admitted to the surgical department. Unit ”B”, Main Alexandria University Hospital (for whom 154 operations were done) were prospectiveiy screened for the presence of ten predefined criteria of posibie choledochoiithiasis. They were 35 males. 115 females with an age that ranged between 21-75 years.
Detailed history and complete physical examination, routine and specific laboratory investigations and ultrasonography were done to all patients. The patients were then subdivided into two groups: group A (negative by criteria) and group B (positive by criteria). For the later group (71 cases) 81 trials of direct cholangiography, using ERCP. PTC. POC, combination of these or others, were done.
For all patients negative by criteria (except when the operative findings necessitate CBD exploration) or cholangiography simple cholecystectomy was done. For other patients positive by criteria as well as cholangiography the CBD was explored. Therefore, the operations done were, 114 simple cholecystectomy, preceeded by cholecystectomy in two patients, while in the remaining 36 patients the CBD was explored 38 times with a positive results in 94.7% and a negative exploration rate in 5.3% of cases.