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Discover 17,836 clinical trials near Boston, Massachusetts. Find research studies in your area.
Showing 12521-12540 of 17,836 trials
NCT01962649
This research study is evaluating an imaging contrast agent called indocyanine green, also known as ICG, in combination with image guided liver biopsies. In this research study, the investigators are looking at the ability of ICG to collect within liver tumors during biopsy. The participant will be receiving a biopsy of their liver as a part of their medical care. By participating in this trial, the only additional requirement will be for the participant to come to the hospital on the day prior to their scheduled biopsy to receive an injection of ICG. During the biopsy, the investigator will measure the amount of ICG that is in the participant's liver tumor by using two experimental devices designed by the study investigators that shine light on tissue. One device consists of an imaging system attached to a small borescope that will go inside the participant's body during the biopsy. The second device shines light on the biopsy sample outside of the participant's body after the biopsy has been taken. The participant may undergo imaging with one or both of these devices.
NCT00076102
Background: Neurofibromatosis Type 1 (NF1) is an autosomal dominant, progressive genetic disorder characterized by diverse clinical manifestations. Patients with NF1 have an increased risk of developing tumors of the central and peripheral nervous system including plexiform neurofibromas, which are benign nerve sheath tumors that may cause severe morbidity and possible mortality. The histopathology of these tumors suggests that events connected with formation of fibroblasts might constitute a point of molecular vulnerability. Gene profile analysis demonstrates overexpression of fibroblast growth factor, epidermal growth factor, and platelet-derived growth factor in plexiform neurofibromas in patients with NF1. Pirfenidone is a novel antifibrotic agent that inhibits these and other growth factors. Clinical experience in adults has demonstrated that pirfenidone is effective in a variety of fibrosing conditions and pirfenidone is presently under study in a phase II trial for adults with progressive plexiform neurofibromas. A phase I trial of pirfenidone in children and young adults with NF1 and plexiform neurofibromas was completed, and has established the phase II dose (the dose resulting in a mean drug exposure \[AUC\] not more than 1 standard deviation below the mean drug exposure \[AUC\] in adults who received pirfenidone at the dose level demonstrating activity in fibrosing conditions). Pirfenidone has been well tolerated. Objectives: To determine whether pirfenidone increases the time to disease progression based on volumetric measurements in children and young adults with NF1 and growing plexiform neurofibromas. To define the objective response rate to pirfenidone in NF1-related plexiform neurofibromas. To describe and define the toxicities of pirfenidone. Eligibility: Individuals (greater than or equal to 3 years to less than or equal to 21 years of age) with a clinical diagnosis of NF1 and inoperable, measurable, and progressive plexiform neurofibromas that have the potential to cause substantial morbidity. Design: The phase II dose will be used in a single stage, single arm phase II trial The natural history of the growth of plexiform neurofibromas is unknown. For this reason, time to disease progression on the placebo arm of an ongoing National Cancer Institute (NCI) Pediatric Oncology Branch (POB) placebo-controlled, double-blind, cross-over phase II trial of the farnesyltransferase inhibitor R115777 for children and young adults with NF1 and progressive plexiform neurofibromas. Funding source - Food and Drug Administration (FDA) Office of Orphan Products Development (OOPD)