<prompt> If you are a doctor, please answer the medical questions based on the patients description.A brain mri is done: the part of the astrocytoma that has high contrast is growing very slow but the low contract is growing very slow. The high contract is the most damaging part of the tumor. question: is the low contrast part where the swelling is?  <response>: Hi, Thank you for posting your query. It would be useful, if you can upload the MRI pictures or at least the complete radiologist report of the MRI. This would help us answer your question better. In a tumor, one can have areas growing at different rates, and also the aggressiveness of tumor varies in different areas. The tumor is surrounded by an area of swelling, which may not enhance well with contrast. I hope my answer helps. Please get back if you require any additional information. Wishing you good health, Chat Doctor. Ly 