Twelve patients with malignant obstruction of the biliary tree were treated by dilating the lesion percutaneously and inserting an internal large-bore teflon prosthesis in place bridging the the stricture. All 12 patients had unresectable neoplasms. The procedure was devised because existing modes of palliation using surgical techniques are associated with significant mortality or mobidity. There are also many problems with nonsurgical catheter drainage. Decompression was achieved in all 12 patients as shown radiographically by passage of contrast into the duodenum. Disappearance of pruitus was achieved in seven of seven patients, and in 10 of 12 disappearance of jaundice (bilirubin, before prosthesis, 18.4 +/- 4.5 mg/dl [mean +/- 1 SD], bilirubin 1 month after prosthesis, 1.8 +/- 0.6 mg/dl [mean +/- 1 SD], P less than 0.001) with improvement of general clinical status was achieved. Percutaneous placement of a permanent biliary tract prosthesis is safe and effective for the palliative decompression of malignant biliary tract obstruction.

The experience of collecting 120 transhepatic portograms, performed in patients with different degrees of portal hypertension, affords the opportunity for discussing the anatomical and hemodynamic features of portosystemic communications. Multiple pathways of decompression were found. The coronary-gastroesophageal collateral formed pathways in 108 cases, other major collaterals in 41, and minor collaterals in 2. This multiplicity of communications suggests that no one vessel is indispensable as a collateral pathway.

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The therapeutic efficacy and safety of percutaneous aspiration of chronic pancreatic pseudocysts was evaluated. Eight patients underwent aspiration a total of ten times. Permanent resolution was obtained in two patients and a third nonsurgical candidate was offered an alternative therapeutic modality. This procedure is simple, rapid, and safe and could become the initial approach to selected patients with a chronic pancreatic pseudocyst.