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Ultrasound Elastography and Ultrasentive Doppler for Surgery of Brain Tumors
Surgery for brain gliomas is usually guided by different imaging techniques including neuronavigation MRI and intraoperative ultrasound that do not allow visualization of the low-density peri-lesional tumor infiltration present in gliomas and from which the tumor recurs. Another important aspect in the management of glial tumors is the histological grade. The appearance of new vessels (called neo-angiogenesis) is one of the crucial steps in the life of these tumors, which signifies the transition to anaplasia. This neoangiogenesis is diagnosed during the anatomopathological analysis of the operative specimen, and may be suspected on...
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Understanding Communication in Healthcare to Achieve Trust (U-CHAT)
Honest, clear, and empathetic communication between pediatric oncologists (POs) and parents of children with cancer (POCCs) is imperative to facilitating therapeutic alliance and ensuring that medical management aligns with the families' goals of care. Communication is particularly important during conversations about disease reevaluation, which often necessitate parental decision-making in the context of emotional distress. POs employ a spectrum of communication styles and strategies during challenging conversations, and there is no consensus regarding linguistic or thematic metrics for high quality communication of upsetting information....
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Understanding Immunotherapy Resistance Mechanisms in Advanced Melanoma
Purpose of the study: The investigators are proposing that melanomas which respond and develop eventual disease stability in response to checkpoint inhibitor immunotherapy undergo a genetic program promoting secondary resistance.
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uPAR-PET for Prognostication in Patients With Non-small Cell Lung Cancer, Malignant Pleural Mesothelioma and Large Cell Neuroendocrine Carcinoma of the Lung
uPAR PET/CT as a prognostic marker in non-small cell lung cancer.
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uPAR-PET/MRI in Glioblastoma Multiforme
The purpose of this study is to investigate the applicability of urokinase plasminogen activator receptor (uPAR) Positron Emission Tomography (PET) / MRI molecular imaging of glioblastoma.
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Uptake and Biodistribution of 89Zirconium-labeled Ipilimumab in Ipilimumab Treated Patients With Metastatic Melanoma
Rationale: Ipilimumab, a monoclonal antibody targeting CTLA-4, is approved for the treatment of metastatic melanoma and significantly increases median overall survival. However, use of this drug is associated with immune related adverse events (IRAEs) like colitis, hepatitis, dermatitis, alveolitis and hypophysitis in 10-40% of the patients. In general IRAEs are manageable by cessation of ipilimumab in combination with treatment with corticosteroids or TNF-alpha blockade but they can be severe or even life-threatening. In addition, treatment with ipilimumab is expensive. Because of the high costs and the potential serious toxicity of ...
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Use of 68Ga-dotatate PET Scan in Neuroendocrine Carcinoma of the GI Tract
The purpose of the study is to understand the extent and degree of somatostatin receptor expression in poorly differentiated neuroendocrine carcinomas . This may help to make a determination if a radiolabeled somatostatin analog therapy, also referred to as peptide receptor radiotherapy (PRRT), can be a potential alternative in the future. At this time, radiolabeled somatostatin analogs have not been tested in patients with poorly differentiated neuroendocrine carcinomas, and their efficacy in this disease is not well known Understanding the extent and degree of somatostatin receptor expression is important in order to evaluate the...
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Use of a Tonometer to Identify Epileptogenic Lesions During Pediatric Epilepsy Surgery
Refractory epilepsy, meaning epilepsy that no longer responds to medication, is a common neurosurgical indication in children. In such cases, surgery is the treatment of choice. Complete resection of affected brain tissue is associated with highest probability of seizure freedom. However, epileptogenic brain tissue is visually identical to normal brain tissue, complicating complete resection. Modern investigative methods are of limited use. An important subjective assessment during surgery is that affected brain tissue feels stiffer, however there is presently no way to determine this without committing to resecting the affected area. It...
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Use of DTT to Define Facial Nerve Position in Vestibular Schwannomas
Vestibular schwannomas (VS) arise from the vestibulocochlear (hearing and balance) nerve, located at the base of the brain. Although benign, VS can enlarge over time, resulting in debilitating symptoms; therefore, surgical removal is frequently offered. One significant risk of surgery is inadvertent injury to the facial nerve, which lies adjacent to the vestibulocochlear nerve. Currently, the nerve's course is only revealed during surgical dissection and injury can cause permanent facial weakness. It would therefore be useful for the surgeon to know the course of the nerve before operating. To this end, a new MRI technique known as...
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Using a Novel Functional MRI Technique to Evaluate for Neurotoxicity
The purpose of this study is to test resting state functional Magnetic Resonance Imaging (rsfMRI) scans to see if rsfMRI scans are better than the standard task based fMRI scans at diagnosing or monitoring central nervous system lymphoma.
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