Active clinical trials for "Necrosis"

The purpose of the present study was to examine the possible association of hepatic CYP3A activity and the susceptibility to femur head necrosis in patients treated with corticosteroids.

This study will examine the use of a variation of standard magnetic resonance imaging (MRI) called diffusion tensor MRI (DT-MRI) for distinguishing injured brain tissue due to radiation therapy (radiation necrosis) from the return of a brain tumor that was previously removed (tumor recurrence). DT-MRI differs from standard MRI in the way that computers process the images; there is no difference in the experience of having the procedure done. Both radiation necrosis and tumor recurrence can occur within weeks to months following brain radiation treatment. Because the treatment and management options for the two conditions differ significantly, distinguishing the two is of critical importance. Currently, surgical biopsy is required to make this differentiation. Healthy volunteers and patients who have received radiation therapy as part of their treatment for a brain tumor may be eligible for this study. All candidates must be at least 21 years old. Patients must have a new area of abnormality that requires a biopsy to determine whether it is a tumor recurrence or radiation necrosis. Candidates are screened with a medical history and physical examination. In addition, patients have blood and urine tests. All participants undergo MRI and DT-MRI. MRI uses a strong magnetic field and radio waves instead of X-rays to obtain images of body organs and tissues. The MRI scanner is a metal cylinder surrounded by a strong magnetic field. During the MRI, the subject lies on a table that can slide in and out of the cylinder and wears earplugs to muffle loud knocking noises that occur during the scanning. Scanning time varies from 20 minutes to 3 hours, with most scans lasting 40-60 minutes. Subjects may be asked to lie still for up to 20 minutes at a time. DT-MRI is a type of MRI that measures how water moves in the brain tissue. This technique uses the same MRI machine as conventional MRI, but the diffusion images are obtained after the normal MRI scan, and by a computer program that is installed into the machine. This completes the participation of healthy subjects. In addition to the scans, patients undergo brain biopsy of the abnormal areas identified by MRI. Patients' commitment to the study protocol is fulfilled when the surgery is complete; they may, however, continue to receive follow-up care at the NIH Clinical Center after they complete the study. They are given the results of the biopsy so that further treatment, if necessary, can be arranged.

The aim of this study was to evaluate the effectiveness of tactile sense, digital periapical radiograph and two different varieties of electronic apex locators at working length determination in primary molars. A total of 30 infected mandibular primary second molar teeth in twelve children aged between 5 and 8 years were included in this study. Working length determination was performed using tactile sense, radiographic method and two different varieties of electronic apex locators (ProPex Pixi® and Ipex®) separately.

Surgery is a common treatment type for damaged joints, tendons and nerves in the upper limb where conservative measures are inappropriate or have failed. These conditions are common and result in significant levels of pain and functional disability. The investigators are conducting a broad ranging study of variation in the provision of surgical treatment and factors affecting outcomes after surgical treatment of upper limb conditions. This will be a population-based study of all patients undergoing surgical treatment funded by the National Health Service (NHS) of England over a nineteen-year period. This study will help to understand the factors associated with a poor outcome following surgery, which can be shared with patients considering treatment options. The investigators will also document current and future health service burden associated with commonly performed surgical procedures including complications and repeat operations.

Zoledronic acid is an adjuvant treatment for primary osteosarcoma. Zoledronic acid has been widely used in the treatment of metastatic bone tumors. In addition to its inhibition of tumor osteoclasis, it also produces certain killing of tumor cells. effect. Foreign studies have shown that zoledronic acid also has a killing effect on osteosarcoma and has a certain inhibitory effect on distant metastasis. We hope that it can reduce tumor recurrence and lung metastasis through this study.

The purpose of this study is to evaluate the safety and effectiveness of the Cementless Oxford Partial Knee System.

Cerebral radiation necrosis (CRN) is a well-documented late complication of radiation therapy for cancers, and may have a devastating effect on the patient's quality of life (QOL). However,CRN was once regarded as a progressive and irreversible disease, no standard therapy has been suggested for CRN. In our clinical practice, we have used nerve growth factor(NGF) to treat CRN, and found that GM1 can successfully reverse CRN. A case report has been published in Journal of Clinical Oncology (JCO) in 2011. So we carried out this prospective study to test the efficacy of NGF for CRN.

Postoperative cognitive dysfunction (POCD) occurs mainly in aged patients. POCD may increase the mortality and morbidity. However, the mechanism of POCD is not clear yet and no effective therapy method was proved. According to our previous study, the central cholinergic system impaired by the anesthesia and surgery play a very important role in the POCD and donepezil an acetylcholinesterase inhibitor can prevent the POCD after isoflurane anesthesia in aged mice. Donepezil is a commercial medicine used for the Alzheimer Disease, which is tolerable and has minimal adverse events. In present study a multi-center randomized case control study was conducted and we hypothesized that donepezil attenuate the POCD.

This study aims to find a correlation between cytokines levels and malignancy potential of different cystic types.

primary endpoint of this Study is maintenance of "at least good clinical status" for a period of 10 years following initial implantation among Cormet procedures enrolled inthe pre-market IDE.