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 A 45 years old hypeensive male presented with sudden onset severe headache, vomiting and neck stiffness. On examination he didn't have any focal neurological deficit. His CT scan showed blood in the Sylvain fissure. The probable diagnosis is: and explain in detail?
Answer is B (Ruptured Aeurysm): Presence of sudden onset headache, meningeal signs in the farm of neck stiffness and absence offocal neurological defecit suggests the diagnosis of subarachnoid haemorrhage. Presence of blood in syln fissure on the CT scan fuher confirms the diagnosis of SAH. The most common cause of SAH is rupture of an intracranial saccular aneurysm which is the single best answer of choice.