Cronicon OPEN ACCESS EC NEUROLOGY EC NEUROLOGY Case Report Arachnoid Cyst and Spinal Arachnoiditis after Subarachnoid Hemorrhage: Case Report and Review of the Literature Fernando Luís Maeda 1 *, Alfredo Victor Albuquerque de Araújo 1 , Cleiton Formentin 1 , Erion Júnior de Andrade 1 , Raphael Augusto Corrêa Bastianon Santiago 1 , Juliana Rebechi Zuiani 2 , Hélio Henrique Jorge Torres 1,2 and João Flávio Daniel Zullo 2 1 Department of Neurosurgery, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil 2 Department of Neurosurgery, State Hospital of Sumaré (HES), Sumaré, São Paulo, Brazil *Corresponding Author: Fernando Luís Maeda, Department of Neurosurgery, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil. Received: February 28, 2020; Published: March 14, 2020 Introduction Arachnoiditis is an inflammatory process leading to fibrosis of the arachnoid and subarachnoid space. Adhesions are formed between fibrin-coated, nerve roots and meninges. Case Report We present a fifty-seven year-old-woman, previously healthy, who presented with acute dorsalgia following with progressive paraparesis and urinary incontinence within a one-week period. At the investigation, MRI demonstrates intrathecal hemorrhage from D2 to S1 accompanied by flow-void at D9 without myelopathy. Spinal and cerebral angiography was normal. The patient was treated conservatively and showed complete improvement within one week. Four months later, the patient returned to the outpatient clinic with back pain and a new MRI exam showing extensive arachnoiditis associated with arachnoid cysts from C6 to S1, without any neurological deficits. Conservative treatment was performed, and the patient presented a good clinical evolution. New MRI was performed one month later. The patient continued with no complaints during the one-year follow-up. Abstract Arachnoiditis is an inflammatory process leading to fibrosis of the arachnoid and subarachnoid space. Adhesions are formed between fibrin-coated, nerve roots and meninges. Severity varies from mild to severe adhesion causing blocking of cerebrospinal fluid (CSF) flow, resulting in CSF loculations. This condition may be caused by chemical agents, spinal surgery, infection, trauma and after spinal or cerebral subarachnoid hemorrhage (SAH). We reported a case of arachnoid cyst and arachnoiditis after cryptogenic spinal subarachnoid hemorrhage. Keywords: Spinal Arachnoiditis; Arachnoid Cyst; Subarachnoid Hemorrhage Citation: Fernando Luís Maeda., et al. “Arachnoid Cyst and Spinal Arachnoiditis after Subarachnoid Hemorrhage: Case Report and Review of the Literature”. EC Neurology 12.4 (2020): 13-17. Figure 1: Left image: MRI of the Spinal Cord SAH hemorrhage. Center image: MRI of 4 months later showing extensive arachnoiditis associated with arachnoid cysts. Right image: MRI of 5 months showing no progression.