Active clinical trials for "Neoplasms"

Single-bolus computed tomography urography (CTU)is a recently developed one-stop imaging examination for diagnosis of urinary tract diseases, including urinary malignancies. However, single-bolus CTU uses two post- contrast phases (i.e.: nephrographic and excretory phases) for diagnosis of urinary tract diseases. A further-developed split-bolus CTU uses solitary post-contrast phase containing mixed information of nephrographic and excretory phases for diagnosis of urinary tract disease; however, whether split-bolus CTU has similar high diagnostic values for urinary malignancies remains unaddressed. Thus, the aim of this study is to compare the diagnostic performance between single-bolus and split-bolus CTU for diagnosing urinary malignancies. This study will enroll 352 patients from two hospitals if they fit the including criteria including aged > 40 years old, presenting with gross hematuria or having urinary malignancies histories, normal renal function (i.e.: estimated glomerular filtration rate > 60 mL/min/1.73 m2, no allergic history to iodinated contrast medium and no pregnancy). All enrolled patients will be randomized to undergo split-bolus and single-bolus CTU in 1: 1 manner. Two radiologists will read CTU images independently using a standardized recording sheet with Likert scales 1-5 representing higher probabilities of presence of urinary malignancies for larger number). The diagnostic values of split-bolus and single-bolus CTU will analyzed using reference standards by final diagnoses of urinary malignancies (i.e.: presence of urinary malignancies based on histological examinations of cytology examinations, biopsies or surgical specimens). The diagnostic performance of split-bolus CTU and single- bolus CTU for urinary malignancies will be compared using areas under receiver operating curve (ROC) to determine whether there is presence of significant difference .

Companion diagnosis by large-panel is in increasing acceptance and need during clinical cancer management. The purpose of this trial is to investigate the benefit of large-panel NGS analysis in companion diagnosis of advanced lung cancer patients and further optimize the parameters.

The study of extended total mesopancreas excision(eTME) for pancreatic head adenocarcinoma is a retrospective multicenter cohort, collecting medical records and follow-up data of patients who underwent radical resection with pancreatic head adenocarcinoma.

This study compares the effects of balloon technology and microcatheter technology on the eye protection rate of neuroblastoma

The purpose of this study is to investigate the feasibility of using open masks or no masks in combination with optical surface scanning for radiotherapy in patients with head and neck cancer.

Glioma is an invasive growth, easy to relapse, poor prognosis, great harm to human and society. Studies have shown that gliomas can cause the dynamic reorganization of brain functional areas, affecting the accuracy of surgical resection and the evaluation of long-term efficacy. While, it is difficult to monitor the functional reorganization of glioma in existing studies. The development trend can not effectively predict the outcome of tumor anaplasia and the compensation of brain function, which restricts the accurate tumor resection. In the early stage of this study, functional connectivity analysis was carried out of gliomas in the motor region and showed that the damage of motor functional connectivity on the opposite side of the lesion occurred earlier than that on the same side, suggesting that there may be some rules of how the disease caused functional reorganization. After stroke, the language and motor function will undergo plasticity, causing the functional areas to slowly repair the damaged function. Contrast to stroke, low-grade glioma grows slower, which gives brain more time to adapt to the damage caused by tumor growth, it may cause more functional reorganization. Professor Hugues Duffau's research showed that it is brain plasticity that can effectively explain patients with low-grade gliomas, even in language and motor areas, did not appear obvious dysfunction. Our previous research found there were significant differences in motor functional connectivity between the two hemispheres of the patients between the plasma tumor group and healthy controls. In addition, in the tumor group, the damage of motor connection on the contralateral side of the lesion occurred before on the ipsilateral side. These results suggest that brain function has been remodeled in patients with brain tumors who have not yet exhibited motor impairment. We presume there may be a certain pattern of brain function reorganization caused by low-grade glioma. This study take patients with brain glioma as the research object and adopt a multi-time point experimental design, combining with cortical electrical stimulation and multimodal magnetic resonance imaging data before and after operation, intending to observe the dynamic changes of language and motor function networks.

Finite element method was used to simulate unilateral hemilaminectomy of cervical spine and facet joint resection of different degrees, and the range of motion and the stress changes of ligament, intervertebral disc and endplate were calculated immediately after operation

The aim of this study is to use single-cell sequencing technology to explore neuroendocrine neoplasm (NEN) molecular biological characteristics, tumor heterogeneity and cell subtypes. Besides. NEN models are constructed for basic research, including primary cell lines, organoids, and animal models.

Retinal microvascularization can provide important informations to systemic vascular phenomena. The non-invasive quantitative description of the retinal vascularization is now possible by performing OCT-angiography and their image analysis software (vascular density and retinal perfusion). Systemic microvacular changes during the establishment of oncological treatment by targeted antiangiogenic therapy are little described in the literature. The objective of this pilot study is to describe the evolution of the retinal vascular density of patients with antiangiogenic drugs. In addition, the evolution of the retinal vascular density of patients on antiangiogenic drugs will study as a function of the response to the treatment and the toxicity of these treatments.

This study is a prospective observational study. We aim to investigate the safety and efficacy of inactivated SARS-CoV-2 vaccine between immune-related myopathy (myasthenia gravis and inflammatory myopathy) patients and health controls. The main study factors include adverse events following immunization (AEFI), serum specific antibody (Acetylcholine receptor (AChR) antibody, Anti-MuSK (muscle-specific kinase) antibody, myositis antibody) and virus neutralizing antibody titers.