Management of Sacral Nerve Root Cysts

Diagnostic Imaging

• The American College of Radiology recommends using MRI with 3D volumetric sequencing, including orthogonal views through the oblique planes with T1, T2, fat-saturated T2 or STIR, and fat-saturated T1 postcontrast sequences, for evaluating sacral nerve root cysts 1
• MRI with 3D volumetric sequencing is the gold standard imaging modality for evaluating cystic arachnoiditis and compression myelopathy, providing essential information on spinal cord compression and requiring both T1 and T2-weighted images 2
• The American College of Radiology recommends Resonancia Magnética (RM) as the study of choice for initial evaluation, especially with volumetric 3D sequences to identify intraventricular and subarachnoid cysts 3
• Tomografía Computarizada (TC) is useful as a complement to detect calcifications and evaluate bone structure, as suggested by the American College of Radiology 4
• Mielografía por TC may be necessary in specific cases of spinal arachnoid cysts or when ventral herniation of the spinal cord is suspected, according to the American College of Radiology 4
• The American Academy of Neurology recommends using MRI with special sequences (FIESTA, 3D CISS, BFFE) to detect ventricular and subarachnoid cysts, as it is superior to CT scans for detecting scolex, edema, and small lesions 3

Treatment Approach

• Decompressive laminectomy with wide fenestration of the cyst is strongly recommended for patients with compression myelopathy due to cystic arachnoiditis, and may include repair of any identifiable dural defect and shunt placement in cases with hydrocephalus or recurrent cysts 2
• The American Academy of Neurology recommends minimally invasive neuroendoscopic removal as the first-line treatment for intraventricular cysts (lateral and third ventricles) 3
• Shunt surgery for hydrocephalus may be necessary in addition to medical therapy 2
• The American Academy of Neurology suggests shunt surgery for hydrocephalus if removal is technically difficult 2
• High-dose corticosteroids, such as dexamethasone at moderate doses (16 mg/day), should be administered to decrease inflammation, typically tapered over 2 weeks 5
• Methotrexate may be considered as a steroid-sparing agent for patients requiring extended courses of anti-inflammatory therapy, with prior screening for latent tuberculosis infection and Strongyloides stercoralis infection 2
• Albendazole (15 mg/kg/day for 14 days) with corticosteroids may be used for parenchymal neurocysticercosis 6, 2
• Prolonged treatment until radiological resolution may be necessary for subarachnoid neurocysticercosis 3, 2

Recommended Treatment by Location

Patient Education and Follow-up

• Patients should be educated about symptoms that require immediate medical attention, including decreased strength in the legs, difficulty controlling the legs, wobbly gait, numbness or tingling, and inability to walk or stand 7
• Follow-up MRI should be performed at least every 6 months until resolution of cystic lesions, as recommended by the Infectious Diseases Society of America 3
• Regular imaging to monitor treatment response is essential, and long-term anticonvulsant therapy may be needed for patients with seizures 2
• Comprehensive imaging with both CT and MRI is crucial to avoid misdiagnosis, and prolonged therapy may be necessary for subarachnoid NCC 2
• Regular follow-up imaging is necessary until complete resolution, and checking for systemic cysticercosis in patients with NCC is important 2

Rehabilitation and Support

• Physical therapy, occupational therapy, and pain management may be necessary to improve mobility, strength, and activities of daily living, and to manage potential complications of long-term steroid use, such as osteoporosis, hyperglycemia, and immunosuppression 5
• The National Institute of Neurological Disorders and Stroke recommends rehabilitation therapies, including physical, occupational, and cognitive therapy, to address residual deficits and improve functional recovery 3
• Psychological support and long-term epilepsy control are also essential for patients with cysticercosis 3