Search results for "Thrombosi"
showing 10 items of 634 documents
Evidence of jak2 val617phe positive essential thrombocythemia with splanchnic thrombosis during estroprogestinic treatment
2008
The discovery of the Janus kinase 2 Val617Phe mutation has brought new insights into the development of myeloproliferative disorders; however, the pathogenesis of essential thrombocythemia and its related thrombotic complications has not been completely understood. Although the Janus kinase 2 Val617Phe mutation confirms the initially suspected clonal character of the disease, factors influencing clonal transformation and expansion in the bone marrow have not been fully detected. Furthermore, patients affected by essential thrombocythemia who are carriers of the Janus kinase 2 Val617Phe mutation show a higher incidence of venous thromboembolism both before, and at the time of diagnosis, comp…
Basilar Artery Occlusion and the Dense Artery Sign in the Newborn
1998
A child with basilar artery occlusion in the neonatal period is reported. The occlusion was documented by unenhanced computed tomography performed in the neonatal period demonstrating a “dense” artery at the tip of the basilar artery. The pattern of cerebral damage on MRI scan at 10 years of age confirmed the site of the vascular occlusion. The evidence suggests that embolization was the operating pathogenic mechanism of cerebral vascular occlusion. Neonatal arterial thrombosis involving the carotid circulation has been well documented and may be due to many pathological factors including direct trauma to the carotid artery and embolization from remote sites. Thrombosis of the vertebral art…
Low-molecular-weight heparin to prevent recurrent venous thromboembolism in pregnancy: Rationale and design of the Highlow study, a randomised trial …
2016
Summary Background Women with a history of venous thromboembolism (VTE) have a 2% to 10% absolute risk of VTE recurrence during subsequent pregnancies. Therefore, current guidelines recommend that all pregnant women with a history of VTE receive pharmacologic thromboprophylaxis. The optimal dose of low-molecular-weight heparin (LMWH) for thromboprophylaxis is unknown. In the Highlow study (NCT 01828697; www.highlowstudy.org ), we compare a fixed low dose of LMWH with an intermediate dose of LMWH for the prevention of pregnancy-associated recurrent VTE. We present the rationale and design features of this study. Methods The Highlow study is an investigator-initiated, multicentre, internation…
Laparoscopic Management of External Iliac Artery Injury Using Yasargil Clamps and Intracorporeal Suture
2011
Presented is a case report of laparoscopic repair of an external iliac artery injury using titanium Yasargil clamps and intracorporeal suture during lymphadenectomy. Yasargil clamps were introduced and placed, 1 distal and 1 proximal to the lesion. The vascular injury site was identified and repaired using intracorporeal sutures. Laparoscopic staging was completed successfully. No sign of thrombosis or vascular occlusion was detected. The patient was discharged on postoperative day 4 to receive adjuvant therapy. Laparotomy is the accepted way of managing major vascular injuries during laparoscopy. However, in controlled circumstances, with availability of Yasargil clamps and a surgeon exper…
Intracranial venous sinus thrombosis as unusual presentation of Bing-Neel syndrome: case illustration.
2017
A 42-year-old woman presented with progressive blurred vision, vertigo, and headache. MRI showed bilateral intraocular protrusion of the optic nerve head and right transverse sinus thrombosis . Low-molecular-weight heparin was administered without symptom relief. Additional MRI showed left frontoparietal arachnoid space obliteration by pathological tissue, and infiltration of the sagittal and right transverse sinuses. After Gd administration, we observed diffuse enhancement of the dura in the left cerebral hemisphere and subdural and epicranial soft-tissue infiltration . A biopsy of the extra-axial tissue was performed. Histological examination showed a neoplasm composed of large cells with…
Platelets, eicosanoids and aging.
1992
Oxidative Stress and Mitochondrial Damage in Neurodegenerative Diseases: From Molecular Mechanisms to Targeted Therapies
2020
The progression of Alzheimer's dementia is associated with neurovasculature impairment, which includes inflammation, microthromboses, and reduced cerebral blood flow. Here, we investigate the effects of β amyloid peptides on the function of platelets, the cells driving haemostasis. Amyloid peptide β1-42 (Aβ1-42), Aβ1-40, and Aβ25-35 were tested in static adhesion experiments, and it was found that platelets preferentially adhere to Aβ1-42 compared to other Aβ peptides. In addition, significant platelet spreading was observed over Aβ1-42, while Aβ1-40, Aβ25-35, and the scAβ1-42 control did not seem to induce any platelet spreading, which suggested that only Aβ1-42 activates platelet signalli…
A popliteal artery aneurysm presenting with ab extrinseco popliteal vein occlusion and compartment syndrome
2012
INTRODUCTION: Aneurysms of popliteal artery are the most frequently reported aneurysm after abdominal aorta. An unusual presentation is compression to adjacent structure. CASE PRESENTATION: A 67 years old caucasian man presenting deep vein thrombosis signs to the right leg including functional impotence was admitted in emergency setting to Vascular Surgery Unit. A pulsing mass was present in the popliteal cave at inspection. The computed tomography angiography demonstrated a 53.2 mm popliteal artery aneurysm causing an ab extrinseco compression of the popliteal vein and a dislocation of popliteal nerve. A surgical open reconstruction with a reinforced Dacron graft was performed via a poster…
Value and limitations of transesophageal echocardiography in the evaluation of aortic prostheses.
1993
Results of 34 transesophageal (TEE) studies in patients with suspected aortic prosthetic dysfunction were compared with transthoracic echocardiographic (TTE) results and to anatomic findings. Mass lesions noted at surgery (autopsy) were correctly described in 93% by TEE versus 43% by TTE. Abscesses were detected in 88% by TEE versus 18% by TTE. Bioprosthetic degeneration was visualized in 88% versus 38% and prosthetic obstruction correctly identified in 75% versus 50% by TEE and TTE, respectively. Anatomic aortic regurgitant lesions were identified in 96% by TEE versus 77% by TTE, whereas the correct origin was detected in 88% of cases by TEE versus 54% of cases by TTE. TEE provides valuabl…
Myopathic form of arthrogryposis and microcirculation lesion.
1989
A microvascular lesion characterized by extensive platelet aggregation, thrombosis, vascular damage with hemorrhages was found in the muscle of a 2-month-old boy with a myopathic form of the arthrogryposis syndrome. The lesion morphologically resembled the vascular leakage seen in immunologically mediated tissue injury. A degradative effect of proteases released during platelet and neutrophil aggregation on the muscle and joints is suggested.