A right-sided subdural frontoparietal hemorrhage in a patient after spinal anesthesia for cesarian section surgery. A Case reportSh Shoja MD1*, Sh Zandi MD2, N Soufizadeh MD3, Sh Shoja MD4For this manuscript,written informed consent was obtained from the patient to publish this report in accordance with the journal’s patient consent policy. Additionally, if the patient/participant is unable to give written consent or is deceased, the same can be obtained from the patient’s next of kin. If the patient is a child or under the age of 16, written consent should be obtained from a parent/guardian.Department of Anesthesiology, Faculty of Medicine, Kowsar Hospital, Kurdistan University of Medical Sciences, Sanandaj, Iran, [email protected] ORCID: 0009-0005-2828-5591Department of Neurosurgery, Faculty of Medicine, Kowsar Hospital, Kurdistan University of Medical Sciences, Sanandaj, Iran, [email protected] ORCID: 0000-0003-2733-1961Department of Obstetrics and Gynecology, Faculty of Medicine, Besat Hospital, Kurdistan University of Medical Sciences, Sanandaj, Iran [email protected] ORCID: 0000-0001-8284-8440Student Research Committee, Kurdistan University of Medical Sciences, Sanandaj, Iran, [email protected] ORCID: 0000-0003-1982-9102*Corresponding Author:Mobile: +989183724633 E-Mail (1): [email protected] E-Mail (2): [email protected]:Background : Peridural and subdural hemorrhage are rare but important complications after regional anesthesia.Case presentation: A 29 year old female gravid 1, para 1, with a history of cesarian section, was admitted for headache exacerbation. The patient received spinal anesthesia. The patient didn’t have any specific disease or previous headache. The drug history was negative except for routine pregenetic drugs. Although, at the time of Spinal anesthesia, the patient was slightly nervous. All previous pre-operation tests and exams were normal. The patient experienced a mild headache a day after the surgery; adequate liquid intake was recommended. The patient was discharged 48 hours after the surgery. Furthermore, after about a week, the patient contacted her primary physician for exacerbated headache. The physician recommended her liquid intake, rest, and proper analgesia. Ten days after surgery, the patient visited a clinic for an excruciating headache with vomiting. Therefore, the patient was admitted emergently. The neurosurgery consult and Magnetic Resonance Imaging (MRI) scan was performed. A subdural frontoparietal hemorrhage on the right side was diagnosed. The patient’s hematoma was drained emergently afterward. The patient was discharged four days after the drainage surgery without neurological complications.Conclusion: Peridural and subdural hemorrhages are rare complications of spinal anesthesia that can be lethal. The chief complaint of this complication is headache. It is essential to keep this complication in mind for patients experiencing headaches after spinal anesthesia surgeries.Keywords: Spinal anesthesia, Subdural hematoma, Regional anesthesia, Post dural puncture headache, Cesarian sectionIntroduction: Peridural or subdural hematoma is one of the rare but essential complications of spinal anesthesia(1). The main complaint of this complication is headache. Additionally, the risk of Post Dural Puncture Headache in obstetric patients is higher than in the general population(2).Case: A 29 year old female gravid 1, para 1, with a history of the cesarian section, was admitted on 21 August 2022 at Kowsar Hospital (Sanandaj, Iran) for headache exacerbation. The patient received spinal anesthesia with a gauge 25 needle placed L3-L4. The patient didn’t have any specific disease or previous headache. The drug history was negative except for routine pregenetic drugs. Although, at the time of Spinal anesthesia, the patient was slightly nervous. All previous pre-operation tests and exams were normal. The patient experienced a mild headache a day after the cesarian section surgery; adequate liquid intake was recommended. The patient was discharged 48 hours after the surgery. Furthermore, after about a week, the patient contacted her primary physician for exacerbated headache. The physician recommended her liquid intake, rest, and proper analgesia. Ten days after surgery, the patient visited a clinic for an excruciating headache with vomiting. Therefore, the patient was admitted emergently. The neurosurgery consult and Magnetic Resonance Imaging (MRI) scan was performed. A subdural frontoparietal hemorrhage on the right side was diagnosed (Figure 1). The patient’s hematoma was drained emergently afterward. The patient was discharged four days after the drainage surgery without neurological complications. Furthermore, a follow-up CT was done after two months, and the result was normal (Figure 2). For reporting as a manuscript, written informed consent was obtained from the patient to publish this report in accordance with the journal’s patient consent policy