You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is In Von Hippel – Lindau Syndrome, the retinal vascular tumour are often associated with intracranial hemangioblastoma. Which one of the following regions is associated with such vascular abnormalities in the syndrome? and explain in detail?
It is AD life threatening phacomatosis characterized by capillary haemangiomas of retina or optic nerve head and haemangioblastoma of cerebellum, spinal cord, medulla or pons.