Idiopathic bilateral occlusion of Foramen of Monro treated by septostomy with unilateral foraminoplasty: a rare case report

INTRODUCTION: Idiopathic occlusion of the Foramen of Monro is extremely rare in adults. The occlusion is classified into four types, with the first being the most infrequent. This condition induces noncommunicating hydrocephalus with the ensuing increased intracranial pressure symptoms. Headache is usually the chief complaint. PRESENTATION OF THE CASE: The authors present a case of a 28-year-old female who presented with a chronic headache that was unresponsive to analgesics. No other neurological deficits were present. Fundoscopic examination revealed the presence of bilateral papillary edema. Computed tomography scan results showed bilateral enlargement of the lateral ventricles of the brain. A subsequent MRI scan ruled out secondary causes of occlusion, such as colloid cysts, meningiomas, or choroid plexus tumors, which entailed an idiopathic etiology. Treatment options include ventriculoperitoneal shunt insertion and septostomy with foraminoplasty. The former option is currently the treatment of choice, yet it is notorious for its ramifications, including foreign body reaction, breakage, and mechanical problems. The latter option is free of these risks; however, it requires meticulousness and precision to avoid damaging the fornix, which leads to impaired memory function. CONCLUSION: Septostomy with unilateral foraminoplasty could yield better outcomes if it is performed fastidiously.