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PubMed1985

Monitoring of antifibrinolytic treatment in subarachnoid hemorrhage.

21 patients (aged 28-81 years) with recent subarachnoid hemorrhage (10 saccular aneurysms, 3 arteriovenous angiomas, 8 normal angiograms) were continuously infused with tranexamic acid at a dosage of 5 g daily for up to 14 days. Therapy was surveyed by daily measurement of the available plasminogen activity (aPl) with the chromogenic substrate S-2251 and by a modified bioassay, whereby the concentration of tranexamic acid was determined thrombelastographically and expressed as antifibrinolytic equivalent. In addition, a battery of blood coagulation tests was performed daily. 5 patients died, 1 after postoperative stroke, 3 as a result of general complications during intensive care treatment, but only 1 due to rebleeding. 4 patients were successfully operated during the first week, 1 patient after 2 weeks. aPl fell from 99.2% (SEM 3.0%, n = 21) before treatment to 72.9% (SEM 3.5%, n = 21) after 24 h and to the therapeutic level between 50 and 60% from day 2 on. The mean steady state of the antifibrinolytic equivalent corresponded to about 150 micrograms/ml of tranexamic acid during infusion. Intra- and interindividual changes were relatively small for aPl, when compared with the antifibrinolytic equivalent measured by the bioassay. In 2 elderly patients tranexamic acid infusion had to be terminated because of clinical and laboratory signs of disseminated intravascular coagulation, whereby aPl fell below the therapeutic range, elucidating that this method is a sensitive indicator for a hypercoagulable state and useful for the surveillance of therapy with antifibrinoltic agents.

Adult↗
PubMed1981

Increased fibrinopeptide A formation and thromboxane A2 production in patients with ischemic heart disease: relationships to coronary pathoanatomy, risk factors, and clinical manifestations.

In 98 patients with ischemic heart disease (IHD), independent of their clinical status (previous myocardial infarction, spontaneous angina or effort angina), a hypercoagulable state (indicated by significant elevation of fibrinopeptide A plasma level) and an increased platelet biologic activity were observed. Moreover, plasma fibrinopeptide A concentration and platelet aggregation were remarkably higher in patients with frequently occurring spontaneous clinical manifestations (active disease) than in IHD patients with relatively quiescent symptoms. Abnormalities of blood clotting and platelet changes were not significantly altered by the presence of severity of coronary angiographic fixed obstruction in IHD. Multiple regression analysis indicated that hypercoagulability and increased platelet biologic activity were not a consequence of differences in risk factor patterns in IHD patients compared to control subjects.

Blood Coagulation↗
PubMed1996

Plasma levels of activated FVII in various diseases.

Plasma activated factor VIIa (FVIIa) levels were measured in various diseases using mutant tissue factor (TF). FVIIa levels in thrombotic patients and patients with idiopathic thrombocytopenic purpura were significantly higher than those in healthy control subjects. The plasma FVIIa levels in thrombotic patients treated with warfarin were similar to those of control subjects. The plasma FVIIa levels in pregnant women and patients with systemic lupus erythematosus, infection or malignancies were high. However, the levels in patients with disseminated intravascular coagulation (DIC) were not significantly increased. DIC patients are in a severe hypercoagulable state, and exhibit severe consumption of coagulation factors. The slightly increased FVIIa level in the DIC patients observed is probably considered to be caused by consumption of coagulation factors. The plasma FVIIa level was poorly correlated with other hemostatic parameters except for protein C in our analysis of all cases. In the analysis of DIC and thrombotic patients treated without warfarin, the plasma FVIIa level was negatively correlated with TF antigen. Plasma FVIIa levels might reflect hypercoagulability in thrombotic diseases, and a normalized FVIIa level in patients with thrombotic diseases should be considered to be associated with DIC.

Autoimmune Diseases↗
PubMedDate not supplied

The association of nephrotic syndrome and renal vein thrombosis: a clinicopathological analysis of eight pediatric patients.

Cases with a pathological diagnosis of renal venous thrombosis (RVT) associated with nephrotic syndrome (NS) were studied retrospectively for clinicopathological evaluation. The material consisted of 21 RVT cases which were diagnosed in 2000 consecutive pediatric necropsies, with an overall incidence of about one percent. Eight of the 21 RVT cases were associated with nephrotic syndrome (34%), and this group formed 0.4 percent of the total necropsies in our pediatric center. The glomerulopathies of these nephrotic patients consisted of three cases of Finnish-type congenital NS (FCNS), three cases of renal amyloidosis secondary to familial Mediterranean fever, and two cases of membranoproliferative glomerulonephritis (MPGN). The presence of sepsis associated with disseminated intravascular coagulation, and the morphological age of the thrombi suggested that the RVT was secondary to sepsis in the FCNS cases. In the MPGN and secondary renal amyloidosis cases, the long duration of both the nephrotic state and the administration of diuretics along with glucocorticoid treatment and also the newly formed thrombi without infarction are strong evidences, although not definite, that the RVT developed as a complication of the glomerulopathy. Even though there were no definite clinical criteria for the diagnosis of most of the RVT cases, we would like to emphasize the importance of flank pain, the rapid deterioration of renal functions in a stable nephrotic patient, as well as the hypercoagulable state in the consideration of the development of RVT which indicate the need for appropriate radiological studies for confirmation of this condition during life.

Adolescent↗
PubMed2001

Antibodies from patients with heparin-induced thrombocytopenia stimulate monocytic cells to express tissue factor and secrete interleukin-8.

Thrombosis is a life-threatening complication that occurs in a subset of patients with heparin-induced thrombocytopenia (HITT). The pathogenic mechanisms underlying the variable occurrence of thrombosis in HITT is poorly understood. It was hypothesized that monocyte activation leading to tissue factor expression may play a role in promoting a thrombogenic state in HITT. This study demonstrates that a human platelet factor 4 (PF4)/heparin-specific murine monoclonal antibody (KKO) binds to peripheral blood-derived human monocytes in a PF4-dependent manner. KKO and antibodies from patients with HITT induce monocytes to synthesize and secrete interleukin-8 and induce cell-surface procoagulant activity, which is abrogated following treatment with antihuman tissue factor antibody. The findings suggest a novel mechanism by which PF4/heparin antibodies may promote a hypercoagulable state in patients with HITT. (Blood. 2001;98:1252-1254)

Antibodies, Monoclonal↗
PubMed1995

Risk factors and outcomes for ischemic stroke.

Stroke continues to have a great impact on public health in the United States. Stroke is frequent, recurring, and is more often disabling than fatal. The annual incidence of new strokes in the United States is nearly one half million, with over 3 million stroke survivors alive today. Identifying risk factors for initial ischemic stroke, as well as characterizing the determinants of outcome (stroke recurrence and mortality) after ischemic stroke, is the basis for stroke prevention strategies. Modifiable and nonmodifiable risk factors for ischemic stroke have been identified and include age; gender; race/ethnicity; heredity; hypertension; cardiac disease, particularly atrial fibrillation; diabetes mellitus; hypercholesterolemia; cigarette smoking; and alcohol abuse. New risk factors, such as hypercoagulable states and patient foramen ovale, are currently being investigated. Follow-up studies have quantified case-fatality rates, early recurrence risk, and long-term mortality and recurrence risks. Despite advances in stroke prevention strategies and treatments, stroke recurrence is still the major threat to any stroke survivor. A major goal set by the Public Health Service in its National Health Promotion and Disease Prevention Objectives for the year 2000 is "to reduce stroke deaths to no more than 20 per 100,000." Part of this can be achieved if the risk of stroke recurrence is reduced. However, the frequency and determinants of stroke recurrence are poorly understood. Data from epidemiologic studies can help identify risk factors and outcomes after ischemic stroke, as well as the selection of high-risk individuals for focused risk-factor modification. Current information on these topics is discussed.

Brain Ischemia↗
PubMed2002

Stress, inflammation and cardiovascular disease.

Various psychosocial factors have been implicated in the etiology and pathogenesis of certain cardiovascular diseases such as atherosclerosis, now considered to be the result of a chronic inflammatory process. In this article, we review the evidence that repeated episodes of acute psychological stress, or chronic psychologic stress, may induce a chronic inflammatory process culminating in atherosclerosis. These inflammatory events, caused by stress, may account for the approximately 40% of atherosclerotic patients with no other known risk factors. Stress, by activating the sympathetic nervous system, the hypothalamic-pituitary axis, and the renin-angiotensin system, causes the release of various stress hormones such as catecholamines, corticosteroids, glucagon, growth hormone, and renin, and elevated levels of homocysteine, which induce a heightened state of cardiovascular activity, injured endothelium, and induction of adhesion molecules on endothelial cells to which recruited inflammatory cells adhere and translocate to the arterial wall. An acute phase response (APR), similar to that associated with inflammation, is also engendered, which is characterized by macrophage activation, the production of cytokines, other inflammatory mediators, acute phase proteins (APPs), and mast cell activation, all of which promote the inflammatory process. Stress also induces an atherosclerotic lipid profile with oxidation of lipids and, if chronic, a hypercoagulable state that may result in arterial thromboses. Shedding of adhesion molecules and the appearance of cytokines, and APPs in the blood are early indicators of a stress-induced APR, may appear in the blood of asymptomatic people, and be predictors of future cardiovascular disease. The inflammatory response is contained within the stress response, which evolved later and is adaptive in that an animal may be better able to react to an organism introduced during combat. The argument is made that humans reacting to stressors, which are not life-threatening but are "perceived" as such, mount similar stress/inflammatory responses in the arteries, and which, if repetitive or chronic, may culminate in atherosclerosis.

Acute-Phase Proteins↗
PubMed2001

The impact of dalteparin (Fragmin) on thrombin generation in pregnant women with venous thromboembolism: significance of the factor V Leiden mutation.

Hypercoagulability is observed in patients with inherited thrombophilia, e.g. factor V Leiden (FVL) mutation. Pregnancy represents a hypercoagulable state as well. This study addresses the effects of the FVL mutation on haemostatic activation during pregnancy as indicated by prothrombin fragments (F1+2). 233 pregnant women with no history of venous thromboembolism were studied. Additionally, two patient groups (25 pregnant FVL carriers and 36 pregnant women without thrombophilic diathesis) in whom low molecular weight heparin (dalteparin) was used prophylactically against rethrombosis were investigated. None of the women developed clinical signs of venous thromboembolism during pregnancy or after delivery. Untreated women exhibited substantial hypercoagulability. F1+2 levels were similar in FVL carriers and non-carriers (difference n. s.). After sufficient adjustment for anti-factor Xa activity (> or =0.15; < or =0.4 U/mL), heparinized women without any thrombophilic diathesis had significantly lower levels of F1+2 than untreated pregnant women. This was evident only in the first and second trimenon (p <0.001). F1+2 levels in heparinized FVL carriers were quite similar to the levels observed in untreated pregnant women, however. In conclusion, our data support the thesis that in comparison to asymptomatic patients, thrombin generation is exaggerated in symptomatic FVL carriers. Coagulation activation during pregnancy can be reduced by dalteparin.

Adult↗
PubMed1996

Antiphospholipid antibodies activate vascular endothelial cells.

Antiphospholipid antibodies (aPL) are associated with a syndrome of arterial and venous thrombosis and recurrent fetal loss. We have shown that IgG purified from patients with aPL activate vascular endothelial cells (EC), converting the steady-state, non-thrombotic endothelial surface to a pro-thrombotic state. The aPL-activated EC are characterized by the expression of leukocyte adhesion molecules, including ICAM-1, VCAM, and E-selectin. EC activation is dependent upon the presence of beta 2-GP-I, a cofactor necessary for anticardiolipin reactivity. In addition, EC activation is not attributable to endotoxin contamination, Fc receptor interactions, or immune complexes, but rather is the result of the specific anticardiolipin reactivity of the IgG. Endothelial activation by aPL may be an important mechanism by which these antibodies cause a hypercoagulable state.

Antibodies, Antiphospholipid↗
PubMedDate not supplied

Traumatic intracerebral venous thrombosis associated with an abnormal golf swing.

OBJECTIVES: To describe the occurrence of cerebral venous thrombosis in a 40-year-old man whose cerebral event was induced by a poor golf swing, to review the literature on possible mechanisms producing venous thrombosis, and to compare this case with the literature. BACKGROUND: Headache is the most frequent symptom in patients with cerebral venous thrombosis. However, patients presenting with a headache due to cerebral venous thrombosis are uncommon. The known risk factors for thrombosis include both acquired and genetic factors. When the interaction of these two groups occurs, the magnitude of this interaction is thought to produce a dynamic state that can favor thrombosis. Our case report illustrates that moderate levels of anticardiolipin antibodies together with the mild trauma of a golf swing can induce a cerebral venous thrombosis. This case also suggests that although headache is rarely due to cerebral venous thrombosis, it should be excluded by good medical acumen and testing. RESULTS: Minor trauma induced by a poor golf swing was chronologically related to the development of a progressive cerebral venous thrombosis. The patient had none of the risk factors associated with a predisposition to venous thrombosis: hypercoagulable state, concurrent infection, pregnancy/puerperium, collagen vascular disorder, malignancy, migraine, false-positive VDRL, previous deep vein thrombosis, renal disease, factor V Leiden, or a hematological disorder. There was no anatomical abnormality that would predispose the patient to a cerebral venous thrombosis. The only laboratory abnormality was a moderate anticardiolipin antibody level (25 GPL). The patient was placed on warfarin sodium therapy and is currently without clinical sequela from the venous thrombotic event. CONCLUSIONS: Under certain circumstances, minor trauma can induce cerebral venous thrombosis. A review of the literature indicates that cerebral venous thrombosis in the presence of anticardiolipin antibodies and in the absence of systemic lupus erythematosus is a rare event. Previously, only major traumatic events have been reported to be associated with cerebral venous thromboses. The chronological development of cerebral venous thrombosis after a faulty golf swing strongly indicates that given a background of moderate levels of anticardiolipin antibodies, even minor trauma can induce a venous thrombotic event.

Adult↗
PubMedDate not supplied

Hypercoagulability in working men and women with high levels of panic-like anxiety.

BACKGROUND: There is growing evidence that cardiovascular diseases are relatively more prevalent in subjects who feel anxious. An increased clotting diathesis might subject anxious individuals to an elevated arterial thrombotic risk. We investigated whether panic-like anxiety would relate to a hypercoagulable state. METHODS: Study participants with a complete data set were 691 employees (mean age +/- SD 40 +/- 11 years, 83% men) recruited from two German companies. Subjects were asked to self-rate the onset of sudden feelings of panic in the previous week on a 4-point Likert scale: 0=not at all (n=416), 1=not very often (n=179), 2=quite often (n=55), and 3=very often indeed (n=41). Levels of fibrinogen, of the antifibrinolytic enzyme type 1 plasminogen activator inhibitor (PAI-1), and of the hypercoagulability marker fibrin D-dimer were measured in plasma. RESULTS: While the level of D-dimer was significantly different across the 4 scores of panic feelings (F3, 687=6.49, p <0.001), the levels of fibrinogen and PAI-1 were not. After having controlled for a range of confounders of hemostatic function, the 96 subjects reporting panic feelings either 'quite often' or 'very often indeed' had higher D-dimer levels (mean +/- SEM 165 +/- 12.0 vs. 145 +/- 4.3 ng/ml, F20, 670= 4.78, p=0.030) and lower fibrinogen levels (259 +/- 6.9 vs. 274 +/- 2.5 mg/dl, F20, 670=4.71, p=0.030) than the 595 subjects reporting panic feelings either 'not at all' or 'not very often'. CONCLUSIONS: The findings suggest increased fibrin turnover with sudden feelings of panic. Prospective studies need to show whether such a procoagulant mechanism may contribute to the increased coronary risk with panic-like anxiety.

Adult↗
PubMed2001

Activation of coagulation and fibrinolysis during reconstructive microsurgery in patients with cancer.

Cancer patients are subjected to increased systemic risk of thrombotic events and may therefore be at higher risk of even local thrombosis compromising the outcome of reconstructive microsurgery. Coagulation and fibrinolysis activities were studied serially during and after reconstructive microsurgery in seven patients with oropharyngeal cancer or sarcoma in the extremities. A preoperative hypercoagulable state was found in four patients (elevated fibrinogen, TAT, F1+2, or D-dimer); two of these patients also had a local thrombotic event. In all patients, the plasma markers generally varied perioperatively: fibrinogen decreased, whereas TAT and subsequently D-dimer increased at the end of the operation. However, tPA and PAI-1 remained unaltered, except in the patients with thrombosis in whom PAI-1 activity increased progressively during the operation. F1+2 was also clearly elevated in these two patients at the time of thrombosis. Preoperative assessment of hypercoagulability for this group of patients could be helpful in targeting meticulous antithrombotic protection.

Adult↗
PubMed2006

Red blood cells, platelets and polymorphonuclear neutrophils of patients with sickle cell disease exhibit oxidative stress that can be ameliorated by antioxidants.

Sickle cell disease (SCD) is basically a red blood cell (RBC) disorder characterised by sickling and haemolysis, but platelets and polymorphonuclear neutrophils (PMN) are also involved. Oxidative damage may play a role in the pathogenesis of SCD. Using flow cytometry, we measured oxidative-state markers simultaneously in RBC, platelets and PMN obtained from 25 normal donors, nine homozygous (SS) patients and six SS/beta-thalassaemia patients. Reactive oxygen species (ROS) and reduced glutathione (GSH) were measured following staining of blood samples with fluorescence probes and gating on specific subpopulations based on size and granularity. Ten- to 30-fold higher ROS production and 20-50% lower GSH content were found in RBC, platelets and PMN from SCD patients versus those of their normal counterparts. This could in part account for the clinical manifestations, such as haemolysis, a hypercoagulable state, recurrent bacterial infections and vaso-occlusive incidences, in SCD. We further showed that exposure of SCD samples to antioxidants, such as N-acetyl-cysteine, vitamin C and vitamin E, decreased their oxidative stress. These results suggest that antioxidant treatment of patients with SCD could reduce oxidative damage to RBC, PMN and platelets, thereby alleviating symptoms associated with their pathology. The flow cytometry techniques presented herein could assist in monitoring the efficacy of such treatment.

Adolescent↗
PubMed1983

Impact of automation on the quantitation of low molecular weight markers of hemostatic defects.

Through in depth studies, the biochemical pathways of hemostasis-related systems have been elucidated in terms of well-defined molecular mechanisms. The interrelationships of coagulation, fibrinolytic, kallikrein-kinin, platelets, prostaglandins, blood vessel, and complement systems are now well understood. Methods are currently developed to quantitate the molecular markers of each of these systems and define the involvement of each in disease and drug-related aberrations. Molecular markers allow for very early detection of disease states well before clinical manifestations are seen or current coagulation methods are affected. Therefore prophylactic or therapeutic treatment can begin before a disease state causes damage. Platelet factor 4 and beta-thromboglobulin are low molecular weight proteins released from the light (alpha) granules of platelets and provide a reliable index of endogenous activation and consumption of platelets. Serotonin and ADP are released during activation from the beta-granules and can be measured by high-performance liquid chromatography. Fibrinopeptide A is a molecular marker of the activation of the coagulation process and provides a useful index of the action of thrombin on fibrinogen. Elevated levels of this peptide are found in patients with hypercoagulable states or a thrombotic tendency. B beta 15-42 peptides are released at the early stages of fibrinolysis and are a useful collective parameter for the measurement of the activation of fibrinolysis. In both the primary and secondary fibrinolytic disorders this peptide is elevated. Circulating kinins provide information on the activation of the kallikrein system and are useful in monitoring coagulation and shock related disorders. Arachidonic acid metabolites, such as thromboxanes and prostacyclins, are products of platelet and vascular endothelium interactions. Their measurement in peripheral blood provides a useful tool to measure the vascular and platelet-related thrombotic defects. Furthermore, antiplatelet therapy can be monitored using these parameters. Numerous other metabolites of arachidonic acid such as the leukotrienes and PAFs also are generated in various immunopathologic disorders associated with hemostatic activation. Unlike the other coagulant tests, the measurement of molecular markers in native blood or plasma samples provides a true picture of the endogenous physiology. Since no activator or additive is added to influence the test, these markers provide the most relevant information on the pathophysiologic condition. Since most of these markers are proteins or low molecular weight products, isotopic and nonisotopic immunoassays, high performance liquid chromatography and fluorometric methods can be used to analyze their levels. Furthermore, multiple panels can be developed to profile various pathologic states.(ABSTRACT TRUNCATED AT 400 WORDS)

Arachidonic Acid↗
PubMed1994

Pentoxifylline.

Pentoxifylline (oxpentifylline) is a methylxanthine derivative with potent hemorrheologic properties. In the United States it is marketed for the treatment of intermittent claudication. Human and animal studies have shown that pentoxifylline therapy results in a variety of physiological changes at the cellular level, which may be important in treating a diverse group of human afflictions. Immune modulation includes increased leukocyte deformability and chemotaxis, decreased endothelial leukocyte adhesion, decreased neutrophil degranulation and release of superoxides, decreased production of monocyte-derived tumor necrosis factor, decreased leukocyte responsiveness to interleukin 1 and tumor necrosis factor, inhibition of T and B lymphocyte activation, and decreased natural killer cell activity. Hypercoagulable states improve through decreased platelet aggregation and adhesion, increased plasminogen activator, increased plasmin, increased antithrombin III, decreased fibrinogen, decreased alpha 2-antiplasmin, decreased alpha 1-antitrypsin, and decreased alpha 2-macroglobulin. Wound healing and connective tissue disorders may respond to an increase in fibroblast collagenases and decreased collagen, fibronectin, and glycosaminoglycan production. Fibroblast responsiveness to tumor necrosis factor is also diminished. Potential medical uses of pentoxifylline are reviewed.

Animals↗
PubMed2005

Mesenteric venous thrombosis in a patient with pancreatitis and protein C deficiency.

Mesenteric vein thrombosis is an uncommon manifestation of hypercoagulable states. A case is reported of superior mesenteric vein (SMV) thrombosis in a patient with pancreatitis and protein C deficiency. A discussion of SMV thrombosis identification, management, and outcomes is included. The patient presented with a significant history of alcohol abuse and constant, midepigastric abdominal pain associated with nausea and vomiting. Amylase and lipase were elevated, and the patient was treated for pancreatitis. His symptoms initially responded to intravenous fluid hydration, but soon his clinical picture worsened, with increased nausea and vomiting, abdominal pain, and distension. Contrasted computed tomography of the abdomen revealed SMV thrombosis. A hypercoagulable workup revealed protein C deficiency. After a 3-month course of oral anticoagulant therapy, the SMV thrombosis resolved.

Abdominal Pain↗
PubMed1996

[Resistance to activated protein C. The most common cause of familial thrombophilia].

Resistance to activated protein C (APC) is caused by the most prevalent single gene defect associated with thromboembolic disease so far described. The majority of cases are caused by a single point mutation in the Factor V gene, which predicts replacement of Arg506 in the APC-cleavage site with a Gln. APC resistance is found in 20-60% of patients with venous thrombosis and in 3-10% of the normal population among Caucasians. In its heterozygous state, the mutation is associated with a 5-10-fold increased risk of thrombosis. Homozygosity is associated with more severe APC resistance, and a higher risk of developing thrombosis. By the age of 33 years, 8% of normals, 20% of heterozygotes, and 40% of homozygotes have had manifestations of venous thrombosis. APC resistance has been described in 60% of women with thromboembolic complications during pregnancy and in approximately 30% of women with thromboembolic complications using oral contraceptives. Development of clinical episodes of thrombosis in patients with APC resistance is likely to occur on a multifactorial basis. Hypercoagulable states may result from multigene interactions, and prothrombotic insults in patients with an inherited predisposition may precipitate thrombotic complications. In this review we present and discuss results from the recent medical literature.

Anticoagulants↗
PubMed2005

Clinical significance of superficial vein thrombosis.

OBJECTIVE: To evaluate the clinical implications of superficial thrombophlebitis (STP) including its demographic characteristics, distribution, risk factors, relationship with deep vein thrombosis (DVT), pulmonary embolism (PE), diagnosis and management. METHODS: Data were collected from relevant papers using a MEDLINE search and an extensive bibliography review. Studies were considered only when they contained pertinent material to STP. Thirty-seven papers were analysed. RESULTS: The diversity of patients and methods used in the different studies made the comparison among them difficult. STP is a common condition with an underestimated prevalence. There are many risk factors associated with STP but the strongest relation was seen with hypercoagulable states. Malignancy may be another important factor but the strength of this association remains unknown. Coexistence with DVT was found in 6-53%. PE occurred in 0-33.3%. Propagation to DVT ranged from 2.6 to 15%. Treatment has not been standardised and may include elastic compression, anti-inflammatory drugs, anticoagulation and surgery. CONCLUSION: The limited number of prospective randomised studies on STP does not allow strong recommendations to be given. Although STP most often is perceived as benign, it can coexist with or progress to DVT, and even give rise to PE. It is also associated with hypercoagulability and malignancy.

Humans↗