Bleeding isolated gastric varices: a retrospective analysis.

OBJECTIVE

Isolated gastric varices (IGV) are rare and are believed to be associated with left-sided portal hypertension. We studied patients presenting with bleeding from IGV and compared them with those bleeding from both esophageal and gastric varices.

METHODS

A retrospective analysis of 14 patients with bleeding from IGV was carried out. Portovenography findings (pattern of collateralization and natural shunts) in these patients were compared with a matched group of 69 patients with both esophageal and gastric varices.

RESULTS

Of 14 patients with IGV, 2 had isolated splenic vein thrombosis and 12 had generalized portal hypertension. Portovenograms in 11 of the latter 12 revealed predominantly 'left-sided' collateralization in 8 patients as compared to 17 of 69 (25%) patients with esophageal and gastric varices (p = 0.004); natural shunts were seen in 6 of 11 cases and 15 of 69 (22%) patients in the two groups, respectively (p = 0.05). Abdominal devascularization operation gave good short- and long-term control of bleeding.

CONCLUSIONS

Contrary to belief most patients with isolated gastric varices may have generalized portal hypertension rather than splenic vein obstruction as the cause and hence should be treated by a more extensive procedure than just splenectomy. The IGV could be a result of predominant collateralization to the retroperitoneal area (left-sided collateralization and natural shunts) rather than the usual pattern to the azygos system which results in esophageal varices.