Publications by authors named "Brandon J McMahon"

Background: The role for inferior vena cava (IVC) filters in the oncology population is poorly defined.

Objectives: Our primary endpoint was to determine the rate of filter placement in cancer patients without an absolute contraindication to anticoagulation and the rate of recurrent VTE after filter placement in both retrievable and permanent filter groups. /.

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Patients with myelodysplastic syndrome (MDS) who present with isolated thrombocytopenia (TCP) constitute a poorly described subgroup. The aim of the present study was to retrospectively evaluate disease characteristics and prognosis in patients with MDS and isolated TCP at a tertiary care center. Fifty patients (12 %) had isolated thrombocytopenia as the first presentation of MDS.

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The novel oral anticoagulants (NOACs) represent a major advance in the treatment of patients with nonvalvular atrial fibrillation and venous thromboembolism (VTE). They have several advantages over vitamin-K antagonists such as warfarin, including more predictable pharmacokinetics and improved safety, particularly with fatal bleeding and intracranial hemorrhage. However, several issues remain surrounding the use of NOACs in certain subpopulations and with the approach to reversal.

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Objectives: Hospitalized oncology patients receive care from a variety of professionals, each of whom plays a role in decisions related to blood transfusions. We sought to examine differences in transfusion practices based on professional role, years of experience, and patient clinical scenario.

Methods: We surveyed general medicine residents, hospitalists, and oncologists caring for inpatients at a large academic medical center between August 2013 and June 2014.

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Members of the plasminogen-plasmin (PP) system participate in many physiologic functions. In particular, uPA, its receptor (uPAR) and its inhibitor PAI-1 play an important role in cell migration, cell proliferation and tissue remodeling. Through a number of interactions, these components of the PP system are also involved in the pathogenesis of many diseases.

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The BCR-ABL1-negative myeloproliferative neoplasms (MPN) share an increased risk of thrombotic and hemorrhagic complications. Risk factors for hemorrhage are less well defined than those for thrombosis. Because patients with CALR mutations have higher platelet counts compared to JAK2 V617F-mutated patients, bleeding rates may be increased in this group.

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One of the major advances in the management of thrombosis is arguably the introduction of the new non-vitamin K antagonist oral anticoagulants (NOACs). These are small molecules, designed to directly inhibit specific steps in the coagulation pathway, with dabigatran (Pradaxa), inhibiting thrombin and rivaroxaban (Xarelto), apixiban (Eliquis), edoxaban (Lixiana), and betrixaban being factor Xa inhibitors. They have several advantages over vitamin K antagonists such as warfarin, with more predictable bioavailability, fewer drug interactions, and improved safety, especially intracranial hemorrhage.

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Thrombocytopenia in older patients is associated with several characteristics that are often underrecognized. Among them are the risk of bleeding complications, the senescence of the bone marrow, the increased use of multiple drugs, and greater comorbidity. In this article, the various forms of thrombocytopenia, including primary and drug-associated immune thrombocytopenias, as well as other drug-associated thrombocytopenias, are reviewed.

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The expression of several components of the plasminogen-plasmin (P-P) system in tumor tissues has been shown to have prognostic significance in many human cancers, including those of the breast, prostate, lung, brain, ovary, stomach, colon, rectum, oral cavity, kidney, and bone. Mechanisms of action of the individual components have been extensively studied in tumor cells in vitro and in animal models. By interrupting various putative pathways involved in tumor progression in several experimental tumor models in animals, varying degrees of tumor control have been achieved.

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It is well recognized that cancer patients have an increased risk of thrombosis and bleeding. Contributory factors to thrombotic complications include prothrombotic risks carried by many chemotherapeutic agents, type of cancer, stage of cancer, age, and comorbidities. Surgical procedures and the presence of an indwelling vascular device, often used as a mode of delivery for chemotherapy, further increase the risk.

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Isolable quantities of C60, the smallest stable fullerene, have been synthesized in 12 steps from commercially available starting materials by rational chemical methods. A molecular polycyclic aromatic precursor bearing chlorine substituents at key positions forms C60 when subjected to flash vacuum pyrolysis at 1100 degrees C. No other fullerenes are formed as by-products.

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