Current applications of diffusion tensor tractography analysis of corticospinal tracts for prognostication of motor outcomes or optimization of neurosurgical intervention in hypertensive intracranial hemorrhage

Introduction: Intracranial hemorrhage (ICH) causes often devastating brain injury. Predicting long-term motor prognosis and identifying neurosurgical candidates in cases of ICH has been an imprecise practice. Diffusion tensor tractography (DTT) is an imaging modality that may aid in this challenge. This literature review aimed to investigate DTT applications in patients with spontaneous ICH for either motor function prognosis or surgical intervention. Materials and methods: A PubMed and Ovid literature review was performed to select and evaluate studies utilizing DTT for motor prognostication or analysis/optimization of surgical outcomes in patients with spontaneous hypertensive ICH. Studies investigating ICH due to suspected vascular anomalies were excluded. Results: Forty-two studies met criteria. Six studies addressed surgical application. Surgery was not associated with increased mortality but was associated with decreased hematoma volume and CST compression and improved motor outcomes. Prognostic studies demonstrated that DTT correlates with motor function at multiple timepoints. Conclusion: DTT is a relatively new imaging technique that may help predict prognosis of patients’ motor function after spontaneous ICH. Additionally, it could possibly serve as an adjunct for determining which patients would benefit from surgical decompression or even help guide surgical approach to hematomas that displace the CST.