Article in PDF format - JOP Home page

JOP. J Pancreas (Online) 2009 Mar 9; 10(2):82-87.

Role of Anticoagulation in the Management of Pancreatic Cancer

Muhammad Adnan Sohail, Muhammad Wasif Saif

Yale Cancer Center, Yale University School of Medicine. New Haven, CT, USA


Pancreatic cancer remains a major clinical challenge. Recent advances in chemotherapeutic and targeted agents have offered a modest survival benefit. One of the major complications of pancreatic cancer is venous thromboembolism. Although it is well-known fact that patients with mucinous carcinoma of the pancreas and gastrointestinal tract pose an increased risk of developing thromboembolic complications, scarce data exists regarding the incidence and pathogenesis of venous thromboembolism in pancreatic cancer patients. The incidence of venous thromboembolism in pancreatic cancer patients ranges from 17% to 57%. Clinical data also suggest that the occurrence of venous thromboembolism may be associated with poorer prognosis in such patients. Recent data suggest that anticoagulant treatments may improve cancer patient survival by decreasing thromboembolic complications as well as by anticancer effects. Thromboembolic disease in pancreatic cancer presents a life-threatening complication and is regarded as paraneoplastic manifestation of the disease. Effective management of this risk factor is very important in the management of pancreatic cancer. Given the lack of extensive data and the clinical relevance of this topic for both physicians and basic research scientists, the authors review the incidence, pathogenesis and clinical implications of venous thromboembolism in pancreatic cancer patients.

Summary Points
  • Pancreatic cancer has one of the highest rates of venous thromboembolism of all solid neoplasms.
  • Reported incidences of disease range from 17% to 57%.
  • The mechanism underlying this association is incompletely understood, but probably multifactorial, including tissue factor expression by tumor cells may be partly responsible.
  • The activation of coagulation is not simply an epiphenomenon, but might also be related to enhanced tumour growth and angiogenesis.
  • Clinical manifestations of thromboembolic disease in pancreatic cancer include deep venous thrombosis, pulmonary embolism, disseminated intravascular coagulation, portal vein thrombosis, and arterial thromboembolism.
  • Thromboembolism predicts an increased risk for the development of an occult cancer, including a pancreatic carcinoma.
  • Thromboembolic events are associated with a poorer prognosis in patients with pancreatic cancer.
  • Recurrence of thromboembolism in patients with pancreatic carcinoma predicts reduced duration of survival.
  • Use of either warfarin or low molecular weight heparin seems to improve survival in patients with pancreatic carcinoma
  • Further research is needed to understand better the morbidity and mortality associated with this disease in pancreatic cancer and to optimize strategies of prevention and treatment.


Cancer and its treatments are well-recognized risk factors for venous thromboembolism (VTE). Although the incidence of VTE in cancer patients is not well documented, there is evidence that the absolute risk depends on the tumor type, the stage or extent of the cancer, and treatment with antineoplastic agents. The most common cancer types seen in patients with thrombosis are breast, colorectal and lung, reflecting the prevalence of these malignancies in the general population. When the underlying prevalence is taken into account, cancers of the pancreas, ovary and brain are the most strongly associated with thrombotic complications. Although idiopathic thrombosis can be the first manifestation of an occult malignancy, extensive screening for cancer in these patients has not been shown to improve survival and is not warranted. Despite treatment, cancer patients with thrombosis have a poor prognosis. This is likely due to premature deaths from recurrent VTE and to the aggressive nature of the underlying cancer. Further research is needed to address the many clinical questions in the management of thrombosis in patients with cancer.

History of Association between Pancreatic Cancer and VTE

French internist Trousseau suggested the relationship between thrombosis and gastrointestinal cancer [1]. It is believed that he himself developed thrombosis and died of a gastrointestinal cancer [2, 3] and Trousseau's syndrome has been studied extensively to determine whether thrombophlebitis really predicts the presence of a visceral tumor.

Sproul was the first who demonstrated the association between thromboembolism and pancreatic cancer in 1938 [4]. Since then it has become dogma that thromboembolism is associated with pancreatic carcinoma, despite the existence of several studies that have indicated that the relationship is neither unique to pancreatic carcinoma nor especially common in patients with this disease [5].

Virchow made important contribution in nineteenth century when he described the consequences of embolism in the pulmonary vasculature [6, 7]. Virchow's triad consists of stasis, vascular injury and hypercoagulability which later used to explain how venous thrombosis develops. These same factors seem to be involved in cancer tissue and cause the formation of local thrombi. As the tumor-specific causes of hypercoagulability have been reviewed already [4], we discuss here the main factors, and how to manage it.

How Common is Hypercoagulability in Pancreatic Cancer

Hypercoagulability in cancer is very common. Ovarian cancer is the most common cause of thrombotic event [8]. Hypercoagulability is more common in patient of pancreatic cancer than any other type of gastrointestinal tumors. It has been reported that incidences of disease range from 17% to 57% [9]. The chances of recurrence are high in pancreatic cancer than any other type. One study found that 13.6% of patients with pancreatic carcinoma experienced a thromboembolic event during therapy [10]. However, tumors such as bladder, esophagus and breast cancers are less likely than pancreatic carcinoma to be associated with thromboembolic events [11].

Why is Hypercoagulation Common in Pancreatic Cancer?


It is common because the tumor is retroperitoneal in location, decrease activity in bedridden patients, patient’s frequent hospitalization and radiation injury to the vessels.

Increased Pro-Thrombotic Factors

In pancreatic cancer, tissue factor [12, 13], thrombin [14, 15] and fibrinogen [16] level are increased. Higher concentration of tissue factor in tumor tissue has been shown to be associated with the development of thromboembolic events [13]. Plasma levels of thrombin have also been found to be elevated in patients with pancreatic carcinoma [12].

Decreased Inhibitors of Anticoagulation

The inhibitors of anticoagulation is decreased with pancreatic carcinoma add another ingredient in the hypercoagulation. These factors include antithrombin III, heparin cofactor II, protein C, free protein S, and thrombomodulin [17, 18, 19].

Increased Platelet Aggregation

Increased platelet aggregation results from increased expression of fibrinogen and thrombospondin-1, as well as from the production of mucins by the tumor [20, 21, 22, 23]. Mucins interact with platelets and generate platelet-rich microthrombi without the involvement of thrombin. These platelet-rich aggregates are then more likely to cause microangiopathic disease [23]. A decrease in expression of plasminogen activator [24] and an increase in circulation levels of plasminogen activator inhibitor have been reported [25] (Figure 1).

Figure 1. Scheme of the coagulation cascade. TF: tissue factor; TFPI: tissue factor pathway inhibitor; VIIa, activated factor VII; X: factor X; Xa: activated factor X


Role of Inflammation

Transforming growth factor is upregulated in pancreatic carcinoma cell lines [26] and induces plasminogen activator inhibitor-1 (PAI-1), which has a procoagulatory effect [27]. Another inflammatory cytokine that is upregulated in patients with several types of cancer, tumor necrosis factor (TNF) [28] has also been shown to induce the expression of tissue factor and to downregulate the expression of the inhibitor of coagulation thrombomodulin in endothelial cells [29]. Currently, no data exists to show the direct effect of TNF expression on coagulation in patients with pancreatic carcinoma. However, inflammatory cells recruited to the tumor site do contribute to angiogenesis in patients with pancreatic carcinoma. This can be explained by the fact that proangiogenic growth factors such as VEGF are expressed by mast cells and macrophages [30].

Is There a Genetic Component Responsible for Hypercoagulation in Pancreatic Cancer Patients?

Activation of the v-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (KRAS), which is associated in the70% of the cases of loss-of-function mutations in the tumor protein p53 (TP53) gene, which encodes the tumor suppressor P53 [31, 32]. Furthermore, both KRAS activation and loss-of-function for TP53 have been shown to have a cumulative effect on the expression of tissue factor in tumor cells and on circulating levels of tissue factor in mice with colon cancer [31] (Table 1).

Table 1. Causes of hypercoagulability in pancreatic cancer. Patient’s specific causes and tumor specific causes.

  • Retroperitoneal location of the tumor may predispose hypercoagulation
Patient-related factors
  • Decreased activity in bedridden patients
  • Frequent hospitalizations
Treatment-related factors
  • Radiation injury to the blood vessels
  • Possible role of chemotherapy
Tumor-specific causes
  • Activation of the coagulation cascade mediated by increases in the expression of tissue factor, thrombin and fibrinogen, and decreases in the expression of TFPI, AT-III, heparin cofactor II, protein C, protein S, and thrombomodulin (indirect evidence)
  • Platelet activation mediated by increases in the expression of fibrinogen, thrombospondin-1 and mucins
  • Suppression of fibrinolysis mediated by decreases in the expression of plasminogen activators (PAR-1 and PAR-2) and increases in the expression of plasminogen inhibitors such as PAI-1
Genetic factors
  • Mutations in KRAS and TP53 (extrapolated from colon cancer) mediated by increases in the expression of uPA and tissue factor

AT-III: antithrombin III; KRAS: v-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog; PAI: plasminogen activator inhibitors; PAR: protease-activated receptor; TFPI: tissue factor pathway inhibitor (lipoprotein-associated coagulation inhibitor); TP53: tumor protein p53; uPA: urokinase-type plasminogen activator

Can Thromboembolism Predict the Presence of Pancreatic Carcinoma?

Sometime thrombotic event could be the first presentation of cancers. It has been reported that 3.3-5.0% of patients with cancer present with a thrombotic event [33, 34].

There is 5.0-7.6% chance that the patients who present with thromboembolism develop cancer on follow-up [34]. There is, therefore, an odds ratio of 7.9 (95% CI: 3.14-20.09, P<0.01) for the presence of an occult cancer in patients who present with venous thromboembolic disease [35]. The standardized incidence ratio for the development of cancer within 1 year of venous thromboembolism was 1.3 (95% CI: 1.2-1.5), and the risk of pancreatic carcinoma was 2.6 (95% CI: 1.8-3.6), which was higher than for renal, stomach or lung cancer, but lower than for ovarian cancer [8]. The meta-analysis shows that the relative risk for the development of pancreatic carcinoma after an initial thromboembolic event was calculated to be 6.1 (95% CI: 3.8-9.7), compared with those who did not experience a thromboembolic event. The proportional incidence ratio was also 6.3 (95% CI: 3.8-10.6) [11]. Patients who have thromboembolic event have a six-fold higher chance of developing pancreatic cancer than the general population. This suggests that a thromboembolic event is associated with an increased risk for the development of pancreatic cancer.

Is There a Role of Embolic Tumor in Tumor Progression?

Recent studies evidenced that malignant growth has also been linked to activity of heparin-like glycosoaminoglycans, to neoangiogenesis, to protease activity, to immune function and gene expression in addition with activation of coagulation and fibrinolysis [36]. Emboli from the tumor can cause stroke and pulmonary embolism. Pancreatic tumors are the common cause of deep venous thrombosis. But there is not much data available on the embolism of pancreatic tumor.

Does Thromboembolism or Recurrent Thromboembolism Predict Poor Outcome?

There seems to be a relationship between thromboembolic events and poor prognosis [37]. Patients who have a thromboembolic event are more likely to have advanced cancer diagnosed within 4-12 months [8]. A retrospective analysis of patients with pancreatic carcinoma who received different chemotherapy regimens (all of which included gemcitabine) shows that a synchronous thromboembolism was detected in 19.3% of patients associated with a higher probability of not responding to therapy(odds ratio 2.98; 95% CI: 1.42-6.27; P=0.004), but did not predict a shorter survival [10]. So it seems reasonable to say that the development of thromboembolic disease around the time of diagnosis might predict poor prognosis in patients with pancreatic carcinoma.

Is There Any Potential Role of Anticoagulation in Pancreatic Cancer?


Warfarin, a vitamin K inhibitor, interferes with carboxylation of the hepatic coagulation factors II, VII, IX and X, which decreases their activity [38]. In a randomized, prospective study, patients were treated with warfarin for either 3 or 12 months after a first episode of thromboembolic disease. There was no significant difference in the number of newly diagnosed cancer cases between the groups after 5 years of follow-up. This finding suggests that there is no benefit of extending anticoagulation treatment from 3 to 12 months, but it does not resolve whether any anticoagulation with warfarin has a beneficial effect [39]. Only two studies have examined the use of warfarin in patients with pancreatic carcinoma - one retrospective and one prospective (Table 2). In the retrospective study [40], mean survival was increased from 2.3 to 5.0 months (addition of 2.7 months; i.e., extended from 2.3 to 5 months) upon addition of warfarin to chemotherapy in an unselected group of 280 patients receiving different combinations of chemotherapy plus warfarin. In a subgroup of patients receiving the same chemotherapy regimen, the increase in median survival was smaller (2 months; i.e., extended from 5.1 to 7.1 months), but the improvement was still significant (P=0.05). In this study, patients were hospitalized every 2 weeks and all received low molecular weight heparin during their hospital stay at prophylactic doses. As low molecular weight heparin was administered to all patients irrespective of the use of warfarin, the increase in survival could be attributed to warfarin use. There was no significant increase in bleeding complications as a result of warfarin use. As the dose of warfarin was set at 2.5 mg without attempting to achieve a therapeutic prothrombin time, no laboratory monitoring was needed. Biases can result in over interpretation in retrospective analyses; therefore, Nakchbandi et al. [41] also examined prospectively whether administration of low-dose warfarin increased survival. The administration of low-dose warfarin resulted in a median survival of 6.8 months that compared favorably with historical controls not treated with warfarin, in whom median survival was 3.6 months, confirming the findings of the retrospective analysis.

Table 2. Clinical studies on the use of warfarin in patients with pancreatic carcinoma.

Type of study

No. of patients

Type of anticoagulant


Median survival


Retrospective [40]


2.5 mg daily


Increased from 2.3 to 5 months

Survival increased from 3.6 to 7.1 months in a subgroup receiving the same therapy

Prospective, one group, uncontrolled [41]


2.5 mg daily

Systemic gemcitabine with combined regional gemcitabine and mitomycin C

6.8 months
(untreated historical controls had a median survival of 3.6 months)

Improved survival compared with historical controls


Heparin binds to the enzyme inhibitor antithrombin (AT) causing a conformational change those results in its activation through an increase in the flexibility of its reactive site loop. Because of its short biologic half life of approximately one hour, heparin must be given frequently or as a continuous infusion. However, the use of low molecular weight heparin (LMWH) has allowed once daily dosing, thus not requiring a continuous infusion of the drug. Two studies have examined whether low molecular weight heparin confers any advantage over no anticoagulation in patients with pancreatic carcinoma. Icli et al. [42] examined whether adding low molecular weight heparin to gemcitabine plus cisplatinum offered a survival benefit over the use of chemotherapeutic agents alone in a nonrandomized setting. They found a significant improvement in survival in the low molecular weight heparin group versus the control group (13.0 versus 5.5 months, P=0.0001). A retrospective analysis by von Delius et al. [43] revealed that the addition of low molecular weight heparin to chemotherapy prolonged survival by 2.8 months (i.e., extended from 3.8 to 6.6 months, P=0.006) in patients with metastatic disease, but not in those with localized disease. These data indicate that low molecular weight heparin might have a beneficial effect on the treatment of patients with pancreatic carcinoma; however, the results from two prospective, randomized, multicenter clinical trials of low molecular weight heparin plus chemotherapy have to be awaited. The first study was initiated in Germany (PROSPECT trial) [44] and the second in the UK (FRAGEM trial) [45]. The results of these studies will hopefully help to clarify whether treatment with low molecular weight heparin offers a survival advantage to patients with pancreatic carcinoma (Table 3).

Table 3. Clinical studies on the use of heparin in patients with pancreatic carcinoma.

Type of study

No. of patients

Type of anticoagulant


Median survival


Nonrandomized, prospective [42]


(nadroparin calcium) 2,850 IU/day in 35 patients

Systemic gemcitabine and cisplatin

Increased from 5.5 to 13.0 months

LMWH stopped when disease progressed

Ongoing, randomized, prospective [44]

540 (planned)

LMWH prophylaxis (enoxaparin)

Systemic gemcitabine, folic acid, 5-fluorouracil and cisplatin

Data pending

Enoxaparin initial dosing weight adjusted for 12 weeks and then 40 mg daily

Ongoing, randomized, prospective [45]

120 (planned)

(dalteparin sodium)

Systemic gemcitabine

Data pending

Treatment for 12 weeks only

Randomized, phase II [46]



Irinotecan/docetaxel with or without cetuximab

6.5 vs. 5.3 months

Routine use is feasible with low risk of hemorrhage

LMWH: low molecular weight heparin

The Eastern Cooperative Oncology Group (ECOG 8200) conducted a randomized phase II trial of irinotecan/docetaxel with or without cetuximab in metastatic pancreatic cancer. Patients not receiving therapeutic anticoagulation received enoxaparin 40 mg/day. The results showed that the routine use of prophylactic low molecular weight heparin is feasible in patients with advanced pancreatic cancer, with a low risk of hemorrhage on study [46]. Progression free survival was 3.9 months in patients with baseline thrombosis versus 4.2 months in patients with no thrombosis.

How to Move Forward

Much work needs to be done in the future for cancer associated thrombosis. Although new studies and work is going on, it is unlikely that risk for cancer associated thrombosis will decline. Agents that target VEGF and other antiangiogenic therapies have been associated with high incidence of thromboembolic disease. The thrombogenicity of widely used non-cancer drugs, such as inhibitors of cyclo-oxygenase 2, is increasingly being recognized. Newer agents might change antithrombotic therapy. For example, there has been interest in the oral, direct inhibitor of thrombin ximelagatran, the first new oral anticoagulant since warfarin. Unlike warfarin, it exerts its anticoagulant effect almost immediately, and does not need frequent laboratory monitoring. It seems to be as effective as, or more effective than, heparins or warfarin in the treatment and prevention of thromboembolism, and might eventually replace warfarin [46, 47]. Clinical testing of this agent in patients with cancer is awaited.


  1. Trousseau A. Phlegmasia alba dolens. Clinique Medicale de l'Hotel-Dieu 1865; 3:654-712. [More details]

  2. Bariety M. Trousseau, 1801-67. Geneva:Mazenod; 1947:234-235. [More details]

  3. Khorana AA, Fine RL. Pancreatic cancer and thromboembolic disease. Lancet Oncol 2004; 5:655-63. [More details]

  4. Sproul E. Carcinoma and venous thrombosis: the frequency of association of carcinoma in the body or tail of the pancreas with multiple venous thrombosis. Am J Cancer 1938; 34:566. [More details]

  5. Pinzon R, Drewinko B, Trujillo JM, Guinee V, Giacco G. Pancreatic carcinoma and Trousseau's syndrome: experience at a large cancer center. J Clin Oncol 1986; 4:509-14. [More details]

  6. Virchow RLK. Thrombosis and Emboli 1856; 1846-56. In: Gesammelte Abhandlungen zur Wissenschaftlichen Medicin Frankfurt, Meidinger:Sohn & Co Reprint edition:Virchow R 1998; (AC Matzdorff, WR Bell transl Canton, MA:Science History Publications). [More details]

  7. Brotman DJ, Deitcher SR, Lip GY, Matzdorff AC. Virchow's triad revisited. South Med J 2004; 97:213-4. [More details]

  8. White RH, Chew HK, Zhou H, Parikh-Patel A, Harris D, Harvey D, Wun T. Incidence of venous thromboembolism in the year before the diagnosis of cancer in 528,693 adults. Arch Intern Med 2005; 165:1782-7. [More details]

  9. Khorana AA, Fine RL. Pancreatic cancer and thromboembolic disease. Lancet Oncol 2004; 5:655-63. [More details]

  10. Mandalà M, Reni M, Cascinu S, Barni S, Floriani I, Cereda S, et al. Venous thromboembolism predicts poor prognosis in irresectable pancreatic cancer patients. Ann Oncol 2007; 18:1660-5. [More details]

  11. Iodice S, Gandini S, Löhr M, Lowenfels AB, Maisonneuve P. Venous thromboembolic events and organ-specific occult cancers: a review and meta-analysis. J Thromb Haemost 2008; 6:781-8. [More details]

  12. Haas SL, Jesnowski R, Steiner M, Hummel F, Ringel J, Burstein C, et al. Expression of tissue factor in pancreatic adenocarcinoma is associated with activation of coagulation. World J Gastroenterol 2006; 12:4843-9. [More details]

  13. Khorana AA, Ahrendt SA, Ryan CK, Francis CW, Hruban RH, Hu YC, et al. Tissue factor expression, angiogenesis, and thrombosis in pancreatic cancer. Clin Cancer Res 2007; 13:2870-5. [More details]

  14. Wojtukiewicz MZ, Rucinska M, Zimnoch L, Jaromin J, Piotrowski Z, Rózanska-Kudelska M, et al. Expression of prothrombin fragment 1 + 2 in cancer tissue as an indicator of local activation of blood coagulation. Thromb Res 2000; 97:335-42. [More details]

  15. Rudroff C, Seibold S, Kaufmann R, Zetina CC, Reise K, Schäfer U, et al. Expression of the thrombin receptor PAR-1 correlates with tumour cell differentiation of pancreatic adenocarcinoma in vitro. Clin Exp Metastasis 2002; 19:181-9. [More details]

  16. Wojtukiewicz MZ, Rucinska M, Zacharski LR, Kozlowski L, Zimnoch L, Piotrowski Z, et al. Localization of blood coagulation factors in situ in pancreatic carcinoma. Thromb Haemost 2001; 86:1416-20. [More details]

  17. Lindahl AK, Odegaard OR, Sandset PM, Harbitz TB. Coagulation inhibition and activation in pancreatic cancer. Changes during progress of disease. Cancer 1992; 70:2067-72. [More details]

  18. Wojtukiewicz MZ, Sierko E, Zimnoch L, Kozlowski L, Kisiel W. Immunohistochemical localization of tissue factor pathway inhibitor-2 in human tumor tissue. Thromb Haemost 2003; 90:140-6. [More details]

  19. Chaturvedi P, Singh AP, Moniaux N, Senapati S, Chakraborty S, Meza JL, Batra SK. MUC4 mucin potentiates pancreatic tumor cell proliferation, survival, and invasive properties and interferes with its interaction to extracellular matrix proteins. Mol Cancer Res 2007; 5:309-20. [More details]

  20. Marguerie GA, Thomas-Maison N, Ginsberg MH, Plow EF. The platelet-fibrinogen interaction. Evidence for proximity of the A alpha chain of fibrinogen to platelet membrane glycoproteins IIb/III. Eur J Biochem 1984; 139:5-11. [More details]

  21. Isenberg JS, Romeo MJ, Yu C, Yu CK, Nghiem K, Monsale J, et al. Thrombospondin-1 stimulates platelet aggregation by blocking the antithrombotic activity of nitric oxide/cGMP signaling. Blood 2008; 111:613-23. [More details]

  22. Tobita K, Kijima H, Dowaki S, Oida Y, Kashiwagi H, Ishii M, et al. Thrombospondin-1 expression as a prognostic predictor of pancreatic ductal carcinoma. Int J Oncol 2002; 21:1189-95. [More details]

  23. Wahrenbrock M, Borsig L, Le D, Varki N, Varki A. Selectin-mucin interactions as a probable molecular explanation for the association of Trousseau syndrome with mucinous adenocarcinomas. J Clin Invest 2003; 112:853-62. [More details]

  24. Kakkar AK, Chinswangwatanakul V, Tebbutt S, Lemoine NR, Williamson RC. A characterization of the coagulant and fibrinolytic profile of human pancreatic carcinoma cells. Haemostasis 1998; 28:1-6. [More details]

  25. Andrén-Sandberg A, Lecander I, Martinsson G, Astedt B. Peaks in plasma plasminogen activator inhibitor-1 concentration may explain thrombotic events in cases of pancreatic carcinoma. Cancer 1992; 69:2884-7. [More details]

  26. Löhr M, Schmidt C, Ringel J, Kluth M, Müller P, Nizze H, Jesnowski R. Transforming growth factor-beta1 induces desmoplasia in an experimental model of human pancreatic carcinoma. Cancer Res 2001; 61:550-5. [More details]

  27. Albo D, Berger DH, Vogel J, Tuszynski GP. Thrombospondin-1 and transforming growth factor beta-1 upregulate plasminogen activator inhibitor type 1 in pancreatic cancer. J Gastrointest Surg 1999; 3:411-7. [More details]

  28. Fareed D, Iqbal O, Tobu M, Hoppensteadt DA, Fareed J. Blood levels of nitric oxide, C-reactive protein, and tumor necrosis factor-alpha are upregulated in patients with malignancy-associated hypercoagulable state: pathophysiologic implications. Clin Appl Thromb Hemost 2004; 10:357-64. [More details]

  29. Scarpati EM, Sadler JE. Regulation of endothelial cell coagulant properties. Modulation of tissue factor, plasminogen activator inhibitors, and thrombomodulin by phorbol 12-myristate 13-acetate and tumor necrosis factor. J Biol Chem 1989; 264:20705-13. [More details]

  30. Esposito I, Menicagli M, Funel N, Bergmann F, Boggi U, Mosca F, et al. Inflammatory cells contribute to the generation of an angiogenic phenotype in pancreatic ductal adenocarcinoma. J Clin Pathol 2004; 57:630-6. [More details]

  31. Yu JL, May L, Lhotak V, Shahrzad S, Shirasawa S, Weitz JI, et al. Oncogenic events regulate tissue factor expression in colorectal cancer cells: implications for tumor progression and angiogenesis. Blood 2005; 105:1734-41. [More details]

  32. Redston MS, Caldas C, Seymour AB, Hruban RH, da Costa L, Yeo CJ, Kern SE. p53 mutations in pancreatic carcinoma and evidence of common involvement of homocopolymer tracts in DNA microdeletions. Cancer Res 1994; 54:3025-33. [More details]

  33. Monreal M, Lafoz E, Casals A, Inaraja L, Montserrat E, Callejas JM, Martorell A. Occult cancer in patients with deep venous thrombosis. A systematic approach. Cancer 1991; 67:541-5. [More details]

  34. Prandoni P, Lensing AW, Büller HR, Cogo A, Prins MH, Cattelan AM, et al. Deep-vein thrombosis and the incidence of subsequent symptomatic cancer. N Engl J Med 1992; 327:1128-33. [More details]

  35. Monreal M, Fernandez-Llamazares J, Perandreu J, Urrutia A, Sahuquillo JC, Contel E. Occult cancer in patients with venous thromboembolism: which patients, which cancers. Thromb Haemost 1997; 78:1316-8. [More details]

  36. Castellei R, Porro F. Cancer and thromboembolism: from biology to clinics. Minerva Med 2006; 97:175-89. [More details]

  37. Chew HK, Wun T, Harvey D, Zhou H, White RH. Incidence of venous thromboembolism and its effect on survival among patients with common cancers. Arch Intern Med 2006; 166:458-64. [More details]

  38. Hirsh J, Fuster V, Ansell J, Halperin JL; American Heart Association; American College of Cardiology Foundation. American Heart Association/American College of Cardiology Foundation guide to warfarin therapy. Circulation 2003; 107:1692-711. [More details]

  39. Taliani MR, Agnelli G, Prandoni P, Becattini C, Moia M, Bazzan M, et al. Incidence of cancer after a first episode of idiopathic venous thromboembolism treated with 3 months or 1 year of oral anticoagulation. J Thromb Haemost 2003; 1:1730-3. [More details]

  40. Nakchbandi W, Müller H, Singer MV, Löhr M, Nakchbandi IA. Effects of low-dose warfarin and regional chemotherapy on survival in patients with pancreatic carcinoma. Scand J Gastroenterol 2006; 41:1095-104. [More details]

  41. Nakchbandi W, Müller H, Singer MV, Lohr JM, Nakchbandi IA. Prospective study on warfarin and regional chemotherapy in patients with pancreatic carcinoma. J Gastrointestin Liver Dis 2008; 17:285-90. [More details]

  42. Icli F, Akbulut H, Utkan G, Yalcin B, Dincol D, Isikdogan A, et al. Low molecular weight heparin (LMWH) increases the efficacy of cisplatinum plus gemcitabine combination in advanced pancreatic cancer. J Surg Oncol 2007; 95:507-12. [More details]

  43. von Delius S, Ayvaz M, Wagenpfeil S, Eckel F, Schmid RM, Lersch C. Effect of low-molecular-weight heparin on survival in patients with advanced pancreatic adenocarcinoma. Thromb Haemost 2007; 98:434-9. [More details]

  44. Pelzer U, Hilbig A, Stieler J, Roll L, Stauch M, Opitz B, et al. A prospective, randomized trial of simultaneous pancreatic cancer treatment with enoxaparin and chemotherapy (PROSPECT - CONKO 004). J Clin Oncol (Meeting Abstracts) 2006; 24:4110. [More details]

  45. Maraveyas A. A phase II randomized study of chemo-anticoagulation (gemcitabine-dalteparin) versus chemotherapy alone (gemcitabine) for locally advanced and metastatic pancreatic adenocarcinoma (FRAGEM). ClinicalTrials.gov. U.S. National Institutes of Health. [More details]

  46. Burtness BA, Powell ME, Berlin JD, Liles DK, Chapman AE, Mitchell EP, Benson AB. Phase II ECOG trial of irinotecan/docetaxel with or without cetuximab in metastatic pancreatic cancer: updated survival and CA19-9 results. J Clin Oncol (Meeting Abstracts) 2008; 26:4642. [More details]

  47. Sinnaeve PR, Van de Werf FJ. Will oral antithrombin agents replace warfarin? Heart 2004; 90:827-8. [More details]

Article in PDF format

Key words Carcinoma; Heparin; Neoplasms; Pancreas; Pancreatic Neoplasms; Thromboembolism; Thrombophilia; Thrombosis; Venous Insufficiency; Warfarin

Abbreviations KRAS: v-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog; VTE: venous thromboembolism; TP53: tumor protein p53

Conflict of interest The authors have no potential conflicts of interest

Muhammad Wasif Saif
Section of Medical Oncology
Yale University School of Medicine
333 Cedar Street; FMP:116
New Haven, CT 06520
Phone: +1-203.737.1875
Fax: +1-203.785.3788
E-mail: wasif.saif@yale.edu

JOP Home page