PET-DOPA is a special imaging agent used in this clinical trial to help detect and characterize brain metastases from breast, lung, and melanoma cancers. It works by highlighting areas of the brain that may have cancerous growths, making them visible on a PET scan. This helps doctors see if there are any new, untreated cancerous spots in the brain that are at least 5 mm in size.

Non-Small Cell Lung Cancer – This is a type of lung cancer that includes several subtypes such as adenocarcinoma, squamous cell carcinoma, and large cell carcinoma. It typically grows and spreads more slowly than small cell lung cancer. Symptoms may include a persistent cough, chest pain, and shortness of breath. As the disease progresses, it can spread to other parts of the body, including the brain, leading to brain metastases. Brain metastases can cause neurological symptoms such as headaches, seizures, and changes in behavior or cognition.

Breast Cancer – This is a cancer that forms in the cells of the breasts, most commonly in the ducts or lobules. It can present as a lump in the breast, changes in breast shape, or skin dimpling. As it progresses, breast cancer can spread to other parts of the body, including the brain, resulting in brain metastases. Brain metastases from breast cancer can lead to symptoms like headaches, vision changes, and difficulty with balance or coordination. The progression of the disease varies depending on the subtype and other factors.

Melanoma – This is a type of skin cancer that develops from the pigment-producing cells known as melanocytes. It is often characterized by the appearance of a new mole or a change in an existing mole. Melanoma can be aggressive and may spread to other parts of the body, including the brain, forming brain metastases. Brain metastases from melanoma can cause symptoms such as headaches, seizures, and neurological deficits. The progression of melanoma can vary widely based on factors like the stage at diagnosis and genetic mutations.