en Gamma Knife Radiosurgery Case report <p style="text-align: justify;"><strong>Background and Importance:</strong> Lumboperitoneal shunts are commonly used to treat several conditions, but their use can result in&nbsp;significant complications. We discuss a complication of these shunts that has not been reported in the literature to date.<br> <strong>Case Presentation: </strong>An obese, 41-year-old woman admitted to Rasool Akram Hospital complaining of a severe headache and blurred&nbsp;vision. The physical examination indicated that she had papilledema, and a lumbar puncture demonstrated cerebrospinal fluid opening&nbsp;pressure of 33 cm of H2O. Pseudotumor Cerebri was diagnosed, and the patient underwent surgery to insert a lumboperitoneal (LP)&nbsp;shunt. She suffered from severe headaches and nausea during the post-operative period. The post-operative syndrome was misdiagnosed&nbsp;as shunt-induced cerebellar tonsillar ptosis; however, further evaluation indicated that intracranial chronic subdural hematoma,&nbsp;a very rare complication subsequent to lumboperitoneal shunting, was the cause of the post-operative syndrome. Subdural hematoma&nbsp;was evacuated and her symptoms disappeared thereafter.&nbsp;<br> <strong>Conclusion: </strong>Persistent symptoms, such as headache, nausea, and vomiting, after placement of a lumboperitoneal shunt should be&nbsp;taken serious, and imaging, such as a CT of the brain, should be done to rule out subdural hematoma.</p> Benign Intracranial Hypertention, Chronic Subdural Hematoma, Lumboperitoneal Shunt 22 25 http://irjns.org/browse.php?a_code=A-10-124-2&slc_lang=en&sid=1 Hossein Ghalaenovi حسین قلعه نویی 10031947532846003153 10031947532846003153 No Assistant Professor of Neurosurgery, Department of Neurological Surgery, Rasool Akram Complex, Iran University of Medical Sciences, Tehran, Iran Maziar Azar مازیار آذر 10031947532846003154 10031947532846003154 No Associate Professor of Neurosurgery, Department of Neurological Surgery, Rasool Akram Complex, Iran University of Medical Sciences, Tehran, Iran Hessam Rahatlou حسام راحتلو 10031947532846003155 10031947532846003155 Yes Resident of Neurosurgery, Department of Neurological Surgery, Rasool Akram Complex, Iran University of Medical Sciences, Tehran, Iran Shahrzad Astaraki شهرزاد آسترکی 10031947532846003156 10031947532846003156 No Neurosurgeon, Rasool Akram Complex, Iran University of Medical Sciences, Tehran, Iran