Jiakuan Chen1,2, Wenjie He1, Xiejun Zhang3, Minrui Lv1, Xi Zhou1, Xiaolin Yang1,4, Haihua Wei1,4, Haiqin Ma1,5, Hongbing Li6, Jun Xia7. 1. Department of Radiology, The First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen Second People's Hospital, 3002 SunGang Road West, Shenzhen, 518035, Guangdong Province, China. 2. Guangzhou Medical University, Guangzhou, China. 3. Department of Neurosurgery, The First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen Second People's Hospital, 3002 SunGang Road West, Shenzhen, 518035, Guangdong Province, China. 4. Guangdong Medical University, Zhanjiang, China. 5. Shantou University Medical College, Shantou, China. 6. Department of Radiology, Fuyong People's Hospital, Baoan District, Shenzhen, 518103, Guangdong Province, China. lihongbing.2@163.com. 7. Department of Radiology, The First Affiliated Hospital of Shenzhen University, Shenzhen University, Shenzhen Second People's Hospital, 3002 SunGang Road West, Shenzhen, 518035, Guangdong Province, China. xiajun@email.szu.edu.cn.
Abstract
OBJECTIVES: To explore the value of structural neuroimaging in predicting the prognosis of shunt surgery for idiopathic normal-pressure hydrocephalus (iNPH) using two different standard semi-quantitative imaging scales. METHODS: A total of 47 patients with iNPH who underwent shunt surgery at our hospital between 2018 and 2020 were included in this study. The modified Rankin Scale (mRS) and iNPH grading scale (iNPHGS) were used to evaluate and quantify the clinical symptoms before and after shunt surgery. The disproportionately enlarged subarachnoid space hydrocephalus (DESH) and iNPH Radscale scores were used to evaluate the preoperative MR images. The primary endpoint was improvement in the mRS score a year after surgery, and the secondary endpoint was the iNPHGS after 1 year. The preoperative imaging features of the improved and non-improved groups were compared. RESULTS: The rates of the primary and secondary outcomes were 59.6% and 61.7%, respectively, 1 year after surgery. There were no significant differences in preoperative DESH score, iNPH Radscale, Evans' index (EI), or callosal angle (CA) between the improved and non-improved groups. Significant correlations were observed between the severity of gait disorder and EI and the CA. CONCLUSIONS: The value of structural neuroimaging in predicting the prognosis of shunt surgery is limited, and screening for shunt surgery candidates should not rely only on preoperative imaging findings. KEY POINTS: • Early shunt surgery can significantly improve the clinical symptoms and prognosis of patients with idiopathic normal-pressure hydrocephalus (iNPH). • Structural imaging findings have limited predictiveness for the prognosis of patients with iNPH after shunt surgery. • Patients should not be selected for shunt surgery based on only structural imaging findings.
OBJECTIVES: To explore the value of structural neuroimaging in predicting the prognosis of shunt surgery for idiopathic normal-pressure hydrocephalus (iNPH) using two different standard semi-quantitative imaging scales. METHODS: A total of 47 patients with iNPH who underwent shunt surgery at our hospital between 2018 and 2020 were included in this study. The modified Rankin Scale (mRS) and iNPH grading scale (iNPHGS) were used to evaluate and quantify the clinical symptoms before and after shunt surgery. The disproportionately enlarged subarachnoid space hydrocephalus (DESH) and iNPH Radscale scores were used to evaluate the preoperative MR images. The primary endpoint was improvement in the mRS score a year after surgery, and the secondary endpoint was the iNPHGS after 1 year. The preoperative imaging features of the improved and non-improved groups were compared. RESULTS: The rates of the primary and secondary outcomes were 59.6% and 61.7%, respectively, 1 year after surgery. There were no significant differences in preoperative DESH score, iNPH Radscale, Evans' index (EI), or callosal angle (CA) between the improved and non-improved groups. Significant correlations were observed between the severity of gait disorder and EI and the CA. CONCLUSIONS: The value of structural neuroimaging in predicting the prognosis of shunt surgery is limited, and screening for shunt surgery candidates should not rely only on preoperative imaging findings. KEY POINTS: • Early shunt surgery can significantly improve the clinical symptoms and prognosis of patients with idiopathic normal-pressure hydrocephalus (iNPH). • Structural imaging findings have limited predictiveness for the prognosis of patients with iNPH after shunt surgery. • Patients should not be selected for shunt surgery based on only structural imaging findings.
Authors: W Narita; Y Nishio; T Baba; O Iizuka; T Ishihara; M Matsuda; M Iwasaki; T Tominaga; E Mori Journal: AJNR Am J Neuroradiol Date: 2016-06-30 Impact factor: 3.825
Authors: K Kockum; O Lilja-Lund; E-M Larsson; M Rosell; L Söderström; J Virhammar; K Laurell Journal: Eur J Neurol Date: 2018-02-02 Impact factor: 6.089
Authors: A K Ahmed; M Luciano; A Moghekar; J Shin; N Aygun; H I Sair; D Rigamonti; A M Blitz Journal: AJNR Am J Neuroradiol Date: 2018-10-25 Impact factor: 3.825