versão On-line ISSN 2078-5151
S. Afr. j. surg. vol.52 no.2 Cape Town Fev. 2014
M M BernonI; M W SonderupII; G E ChinneryIII; P C BornmanIV; J E J KrigeV
IMB BCh, FCS (SA), Cert Surg Gastroenterol (SA); HPB and Surgical Gastroenterology Unit, Groote Schuur Hospital and Department of Surgery, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
IIMB ChB, FCP (SA), MMed; Division of Hepatology, Department of Medicine, Groote Schuur Hospital and Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
IIIMB ChB, FCS (SA), Cert Surg Gastroenterol (SA); HPB and Surgical Gastroenterology Unit, Groote Schuur Hospital and Department of Surgery, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
IVMB ChB, MMed, FRCS (Edin), FRCS (Glasg), FCS (SA); HPB and Surgical Gastroenterology Unit, Groote Schuur Hospital and Department of Surgery, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
VMB ChB, MSc, FACS, FRCS, FCS (SA); HPB and Surgical Gastroenterology Unit, Groote Schuur Hospital and Department of Surgery, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
The term portal biliopathy (PB) is used to describe the biliary abnormalities associated with portal hypertension. Between 5% and 30% of patients with PB develop biliary obstruction. We report on a patient with extrahepatic biliary obstruction caused by PB that was successfully managed with an intrahepatic segment 3 bypass. The traditional surgical approach for a patient with extrahepatic biliary obstruction caused by PB would be a portosystemic shunt followed by a hepaticojejenostomy if the jaundice persisted. An intrahepatic segment 3 bypass provides definitive treatment ensuring biliary decompression and stone removal in a single procedure in appropriately selected patients.
The term portal biliopathy (PB) is used to describe the biliary abnormalities associated with portal hypertension. PB can occur in any patient with portal hypertension, but is usually associated with extrahepatic portal venous obstruction (EHPVO). Biliary abnormalities occur in 81 - 100% of patients with EHPVO, but only 5 - 30% of patients develop biliary obstruction. The extent of the PB varies from isolated extrahepatic to diffuse intra- and extrahepatic biliary strictures.[1-5]
The management of PB is complex in patients who present with variceal bleeding and clinically significant biliary obstruction, especially when the case is further complicated by biliary stones and cholangitis. Associated biliary stones are reported to occur in up to 17% of patients. When biliary intervention is required, it is generally recommended that a portosystemic shunt (PSS) be performed before the hepaticojejunostomy to avoid the risk of major haemorrhage from the abundant network of venous collaterals around the common bile duct. The added advantages of a PSS are the decreased risk of variceal bleeding and relief of biliary obstruction in 50 - 78% of patients.[1,7-9] The disadvantages of this approach are that effective relief of the portal hypertension and PB cannot be assured with a PSS, which is problematic when there are associated bile duct stones and cholangitis.
Endoscopic interventions are useful as a short-term solution when a patient has associated bile duct stones and cholangitis. They do not provide long-term definitive treatment and complications are significant, especially bleeding from varices in and around the bile ducts. We report on a patient who underwent a successful segment 3 bypass operation for PB after failed endoscopic intervention for biliary stones complicated by episodes of severe cholangitis.
A 36-year-old man was admitted to hospital in November 2012 with recurrent cholangitis. At the age of 5 years he had had an oesphageal variceal bleed secondary to an extrahepatic portal vein thrombosis following umbilical vein sepsis caused by a venous catheter used during a neonatal illness. The oesophageal varices were treated with endoscopic band ligation. The last variceal bleed had occurred over a year before his current presentation.
An ultrasound scan demonstrated intrahepatic biliary dilation, and magnetic resonance cholangiopancreatography (MRCP) confirmed compression of the bile duct by venous collaterals. A dominant stricture was present below the biliary confluence (Fig. 1). Endoscopic retrograde cholangiopancreatography (ERCP) confirmed these findings, and in addition a number of small stones and debris were removed from the common bile duct. A plastic biliary stent was placed to relieve the obstruction.
Two weeks later the patient returned with symptoms caused by a blocked stent, which was replaced with two plastic stents. A laparoscopic cholecystectomy was performed to prevent stone propagation. Marked venous collaterals made dissection in the hepatocystic triangle hazardous, and a subtotal cholecystectomy was necessary. Three weeks later he had a further episode of cholangitis. A percutaneous transhepatic cholangiogram (PTC) and placement of an internal external biliary drain was done to provide biliary drainage. A subsequent PTC (Fig. 2) confirmed that the intrahepatic ducts were not involved. This was compatible with a type 1 PB (Table 1).
In view of the significant venous collaterals, a standard hepaticojejunostomy was not feasible. To provide a definitive surgical solution to the patient's recurrent cholangitis and stones, an intrahepatic segment 3 bypass was therefore performed. During the operation care was taken to avoid the extensive venous collaterals in the hilar region. The location of the segment 3 portal pedicle was confirmed with intraoperative ultrasound. A wedge of liver parenchyma was resected with a cavitron ultrasonic surgical aspirator (CUSA) and the segment 3 duct was identified (Figs 3 and 4). The duct was opened and flushed to clear debris (Fig. 5). A Roux-en-Y jejunal loop was anastomosed to the segment 3 duct (Figs 5 and 6), and the PTC catheter was left in situ. Histological examination of the liver confirmed 'onion skin' fibrosis in keeping with secondary sclerosing cholangitis.
The patient recovered uneventfully, and the biliary stents and PTC drain were removed 2 weeks after the procedure. A check cholangiogram confirmed good biliary drainage via the segment 3 duct. His jaundice resolved fully and no further episodes of cholangitis had occurred at the time of writing (after 12 months' follow-up). His general condition has improved, and he has returned to work.
Most patients with PB remain largely asymptomatic and can be managed conservatively. One-third will develop symptoms including jaundice, pruritus, biliary colic and recurrent cholangitis related to biliary obstruction. These patients warrant careful investigations to plan for possible treatment strategies. Initial investigations in the assessment of PB involve ultrasonography, computed tomography (in particular to assess segmental atrophy of the liver and the portal venous anatomy), and magnetic resonance imaging/MRCP to delineate the biliary anatomy. The typical cholangiographic features of PB include indentations and irregularities in the wall of the bile duct, strictures, angulations, ectasia and filling defects.[10,11]
Surgical treatment is guided by the extent of the biliary involvement as defined by the Chandra classification (Table 1). Patients with extensive biliary involvement (intra- and extrahepatic or isolated intrahepatic strictures) who are unsuitable for a biliary bypass operation can be offered a PSS, which will resolve the biliary obstruction in about 50% of cases. With type I involvement the conventional strategy is to perform a PSS first and then to follow this, if required, with a standard hepaticojejunostomy (Table 2). This treatment strategy may not be applicable in patients with cholangitis and associated gallstones, in whom urgent biliary drainage is essential. Endoscopic intervention is important in the initial management and may provide definitive management in some patients. In more severe cases where there is a combination of a significant stricture and multiple intrahepatic stones, endoscopic interventions are less successful.[12-14]
There is a paucity of data on the role of segment 3 bypass in PB, and few reports have considered this approach as part of a management algorithm. The advantages of this operation are that the risk of bleeding is minimised by the procedure being performed away from the portal hypertensive field, avoiding the need for a PSS. Also, it is the only safe surgical option in those patients with extensive portal venous thrombosis who, like our patient, are unsuitable for a PSS. It is unclear from the data on the surgical management of PB what proportion of cases would be suitable for a segment 3 bypass. In a large series, most of the patients who underwent a standard hepaticojejunostomy had type I biliary abnormalities and may have been suitable for a segment 3 bypass.[7,9,15-19] The long-term follow-up of four patients who had a segment 3 bypass showed a high incidence of recurrent stone disease between 7 and 40 months after the surgery. Biliary clearance was facilitated by cholangioscopy via the afferent bowel loop. Three (75%) of the patients were alive and asymptomatic after a follow-up range of 8 - 9 years.
Careful evaluation of the biliary anatomy and identification of stones is important when considering the best surgical procedure for patients with PB. A segment 3 bypass provides a definitive single-stage surgical procedure that allows biliary decompression and stone removal in one operation. As endoscopic techniques to control oesphageal varices have improved, the need for surgical shunts to prevent bleeding has decreased. A segment 3 bypass should be considered as an alternative procedure to a PSS in patients with PB with favourable biliary anatomy, especially in the presence of stone disease.
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M M Bernon