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Elevated lipoprotein (a) [Lp(a)] is related to the incidence of lower limb deep vein thrombosis and pulmonary embolism. Its role in portal and/or splenic vein thrombosis (PSVT) is not established. A total of 77 consecutive patients who underwent splenectomy for cirrhotic portal hypertension were prospectively studied between 2014 and 2017. The impact of Lp(a) on preoperative day 1 and postoperative days (PODs) 1, 3, 5, 7, and 14 was analyzed. Color Doppler ultrasound examination was performed for the diagnosis of PSVT. The median interval between surgery and postoperative PSVT was 6 days (range: 2-13 days). The levels of Lp(a) were highly increased in patients with PSVT and significant intergroup differences (vs non-PSVT) were found until day 3 and day 5 after operation, respectively. On POD 3, at a threshold of 309.06 mg/L, Lp(a) was a better predictor of PSVT (area under the curve [AUC] = 0.872) compared to the levels on PODs 1, 5, and 7 (AUC = 0.775, 0.796, and 0.791, respectively). The median Lp(a) values peaked at 382.5 mg/L on POD 5 for patients without PSVT. After POD 5, the Lp(a) decreased with values at 347.4 mg/L on POD 7 and 150.7 mg/L on POD 14. For the first time, Lp(a) was shown to be abnormal in patients with PSVT following splenectomy. Monitoring of serum Lp(a) levels on POD 3 might represent a valuable tool to predict early PSVT after splenectomy in cirrhotic patients.

Serum Lipoprotein (a) on Postoperative Day 3: A Strong Predictor of Portal and/or Splenic Vein Thrombosis in Cirrhotic Patients With Splenectomy