Lumbosacral arachnoid cyst with tethered cord: A rare case report
A 6-year-old boy presented to us with complaints of recent onset difficulty in walking and dribbling of urine. On examination he had grade 3/5 power in both lower limbs and absent reflexes. An MRI spine was performed which revealed a clearly defined intradural cystic lesion extending from L2 to S2 which was hypointense on T1-weighted images [] and hyperintense on T2-weighted images [] with tethering of cord. A syrinx was also noted in the cervicodorsal spine []. A tentative diagnosis of lumbosacral arachnoid cyst was made and the patient was taken up for surgery. Multiple level laminectomies were performed and on opening the dura a tense cyst was found [] along with short and thickened filum terminale. There were no other associated lesions. No communication was found between the cyst contents and the subarachnoid space. The lesion was incised and clear fluid contents were let out. The walls were marsupialized and the dura was closed primarily. Detethering of cord was done by transection of thickened filum terminale. Postoperatively the child's motor power began to improve though his bladder was kept catheterized. Postoperative MRI was done which showed complete resolution of cyst []. At follow-up of 2 months patient could walk independently and had regained bladder control.