Correlation of Spinal Cord Injury With Development Of Spinal Arachnoid Cysts: Two Case Reports.

Background: Spinal arachnoid cysts are rare entities, which are composed of a duplication in the arachnoid membrane and resultant cerebrospinal fluid collection, which may present with a progressive myelopathy. The most common symptoms caused by spinal cord compression are paraesthesia, neuropathic pain, paresis and gait ataxia.

Clinical cases: We report here 2 cases from different perspectives of a spinal arachnoid cysts in spinal cord injury. The first case was the occurrence of a spinal cord injury due to compression of a spinal arachnoid cysts causing myelopathy. The second case is a patient who had a traumatic paraplegia for which stabilizing surgery was required and who subsequently developed a spinal arachnoid cysts with neuropathic pain. Both cases required surgery with immediate improvement. However, after a few months both patients needed a revision due to recurrence.

Conclusion: Spinal arachnoid cysts may present with a heterogeneous clinical picture. If cysts are not clinically apparent, a conservative treatment with careful observation can be a justifiable option. In patients with progressive symptoms, surgery is the gold standard of care. However, the literature describes the need for revision surgery in only 12.5% of cases. Regular follow-up is necessary because both of the patients reported here needed revision surgery.