Leiden University Medical Center

This study tests whether taking mifepristone 50 mg once a week can safely prevent pregnancy. 615 women aged 18-35 will use it as their only birth control for one year. The goal is to see if it works well with fewer side effects than daily hormone pills.

This study tests a new way of caring for 'hotspotters'—people with multiple health and social problems who frequently use emergency services. The approach brings together a doctor, mental health nurse, social worker, and the patient to create a personalized care plan, with a coor…

This Phase 2 trial tests whether a sleep-deepening drug (lower-sodium oxybate) or a nerve-stimulating device (non-invasive vagus nerve stimulation), or both, can help clear amyloid-beta protein from the brain in people with cerebral amyloid angiopathy (CAA). Sixty participants wi…

This study tests whether using a person's individual risk of another blood clot or major bleeding can help doctors decide how long they should take blood thinners after a first clot. About 600 adults who had a first deep vein thrombosis or pulmonary embolism will fill out a quest…

This study tests a combination of two immunotherapy drugs (ipilimumab and nivolumab) plus a chemotherapy drug (melphalan) given directly to the liver through a special procedure. It includes 83 adults with advanced uveal melanoma that has spread mainly to the liver. The goal is t…

This study follows 500 people diagnosed with uveal melanoma (a rare eye cancer) for five years after treatment. Participants fill out questionnaires about their physical and mental well-being, treatment side effects, and decision-making. The goal is to learn how different treatme…

This study looks at whether bacteria in the gut and throat can predict how well stage III lung cancer patients respond to the immunotherapy drug durvalumab after chemoradiation. Researchers will collect stool, throat swabs, and breath samples from 126 participants to see if these…

This study uses MRI scans to track how blood vessels in the brain change over time in people with early Alzheimer's disease and healthy volunteers. Researchers aim to understand if reduced blood vessel reactivity is an early sign of dementia. The study involves 120 participants a…

This observational study looks at how brain inflammation contributes to frontotemporal lobar degeneration (FTLD), a group of disorders that cause dementia. Researchers will use advanced brain scans, blood tests, and spinal fluid analysis in 110 participants to find biomarkers tha…

This study tests a tool called PERSARC that gives soft-tissue sarcoma patients personalized information about the risks and benefits of different treatment options. 120 adults with high-grade sarcoma in their arms or legs will either get standard care or care using PERSARC. The g…