This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Which of the following is not a cause of spontaneous CSF leak? \nSelect and explain. \nA. Raised ICP, B. Pseudotumor cerebri, C. Empty sella syndrome, D. Encephalocele', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pseudotumor cerebri, Empty sella syndrome and Encephalocele are causes of spontaneous CSF leak leading to intracranial hypotension. Hence raised ICP is contradictory in spontaneous CSF leak. Ref: Progress in Clinical Neurosciences, Volume 24 By Deepu Banerji , Pages 219-224; Chronic Daily Headache for Clinicians By Peter J. Goadsby, Stephen D. Silberstein, David Dodick, Pages 212-13.', 'role': 'assistant'}]