PT - JOURNAL ARTICLE AU - Alokayli, Shirin H. AU - Maghrabi, Sarah A. AU - Almotairi, Fawaz S. AU - Elwatidy, Sherif M. TI - Unusual association of cervical arachnoid cyst and idiopathic intracranial hypertension AID - 10.17712/nsj.2024.4.20240005 DP - 2024 Oct 01 TA - Neurosciences Journal PG - 284--287 VI - 29 IP - 4 4099 - http://nsj.org.sa/content/29/4/284.short 4100 - http://nsj.org.sa/content/29/4/284.full SO - Neurosciences (Riyadh)2024 Oct 01; 29 AB - Arachnoid cysts (ACs) are more commonly seen intracranially rather than intraspinally, with most being asymptomatic. This case report presents a rare association between symptomatic AC and idiopathic intracranial hypertension (IIH). In a 71-year-old man who exhibited long-standing bilateral shoulder pain and severe left brachialgia despite an unremarkable physical examination. Radiologic investigations revealed a left C5–6 cervical arachnoid cyst, and during treatment, the patient was diagnosed with IIH. Surgical excision of the cyst failed, so the patient was treated with a lumbar puncture (LP) shunt that required several revisions. During these revisions, IIH was diagnosed, leading to the insertion of a ventriculoperitoneal (VP) shunt, which improved the symptoms. Early diagnosis of IIH through lumbar puncture in cases of spinal arachnoid cysts allows for earlier treatment with cerebrospinal fluid (CSF) diversion via a VP shunt, reducing repeated hospital admissions and surgical interventions.