1)Hakim S, Adams RD:The special clinical problem of symptomatic hydrocephalus with normal cerebrospinal fluid pressure. Observations on cerebrospinal fluid hydrodynamics. J Neurol Sci 2:307-327, 1965
2)Hashimoto M, et al;Study of INPH on neurological improvement(SINPHONI):Diagnosis of idiopathic normal pressure hydrocephalus is supported by MRI-based scheme:a prospective cohort study. Cerebrospinal Fluid Res 7:18, 2010
3)Andersson J, et al:Prevalence of idiopathic normal pressure hydrocephalus:a prospective, population-based study. PLoS One 14:e0217705, 2019
4)Kameda M, et al;SINPHONI and SINPHONI-2 Investigators:Cost-effectiveness analysis of shunt surgery for idiopathic normal pressure hydrocephalus based on the SINPHONI and SINPHONI-2 trials. Acta Neurochir(Wien)159:995-1003, 2017
5)Ishikawa M, et al:Improvement in the long-term care burden after surgical treatment of patients with idiopathic normal pressure hydrocephalus:a supplementary study. Sci Rep 11:11732, 2021
6)Ishikawa M;Guideline Committe for Idiopathic Normal Pressure Hydrocephalus, Japanese Society of Normal Pressure Hydrocephalus:Clinical guidelines for idiopathic normal pressure hydrocephalus. Neurol Med Chir(Tokyo)44:222-223, 2004
7)Ishikawa M, et al:Guidelines for management of idiopathic normal pressure hydrocephalus. Neurol Med Chir(Tokyo)48(Suppl):S1-23, 2008
8)Marmarou A, et al:Development of guidelines for idiopathic normal-pressure hydrocephalus:introduction. Neurosurgery 57(3 Suppl):S1-3;discussion ii-v, 2005
9)Marmarou A, et al:The value of supplemental prognostic tests for the preoperative assessment of idiopathic normal-pressure hydrocephalus. Neurosurgery 57(3 Suppl):S17-28;discussion ii-v, 2005
10)Kitagaki H, et al:CSF spaces in idiopathic normal pressure hydrocephalus:morphology and volumetry. AJNR Am J Neuroradiol 19:1277-1284, 1998
11)Yamada S, et al:Optimal diagnostic indices for idiopathic normal pressure hydrocephalus based on the 3D quantitative volumetric analysis for the cerebral ventricle and subarachnoid space. AJNR Am J Neuroradiol 36:2262-2269, 2015
12)Yamada S, et al:Comparison of CSF distribution between idiopathic normal pressure hydrocephalus and Alzheimer disease. AJNR Am J Neuroradiol 37:1249-1255, 2016
13)Kamiya K, et al:Diffusion imaging of reversible and irreversible microstructural changes within the corticospinal tract in idiopathic normal pressure hydrocephalus. Neuroimage Clin 14:663-671, 2017
14)Irie R, et al:Neurite orientation dispersion and density imaging for evaluation of corticospinal tract in idiopathic normal pressure hydrocephalus. Jpn J Radiol 35:25-30, 2017
15)Saito A, et al:Ventricular volumetry and free-water corrected diffusion tensor imaging of the anterior thalamic radiation in idiopathic normal pressure hydrocephalus. J Neuroradiol 47:312-37, 2020
16)Goto M, et al:Detection of lesions depends on the DARTEL template used in group comparisons with voxel-based morphometry. Acta Radiol 61:236-243, 2020
17)Mori E, et al;Japanese Society of Normal Pressure Hydrocephalus:Guidelines for management of idiopathic normal pressure hydrocephalus:second edition. Neurol Med Chir(Tokyo)52:775-809, 2012
18)Kazui H, et al;SINPHONI-2 Investigators:Lumboperitoneal shunt surgery for idiopathic normal pressure hydrocephalus(SINPHONI-2):an open-label randomised trial. Lancet Neurol 14:585-594, 2015
19)Miyajima M, et al;SINPHONI-2 Investigators:One-year outcome in patients with idiopathic normal-pressure hydrocephalus:comparison of lumboperitoneal shunt to ventriculoperitoneal shunt. J Neurosurg 125:1483-1492, 2016
20)Kuriyama N, et al:Nationwide hospital-based survey of idiopathic normal pressure hydrocephalus in Japan:epidemiological and clinical characteristics. Brain Behav 7:e00635, 2017
21)Nakajima M, et al;The research committee of idiopathic normal pressure hydrocephalus:Guidelines for Management of Idiopathic Normal Pressure Hydrocephalus(Third Edition):endorsed by the Japanese Society of Normal Pressure Hydrocephalus. Neurol Med Chir(Tokyo)61:63-97, 2021
22)Yamada S, et al;SINPHONI-2 Investigators:Disability risk or unimproved symptoms following shunt surgery in patients with idiopathic normal-pressure hydrocephalus:post hoc analysis of SINPHONI-2. J Neurosurg 126:2002-2009, 2017
23)Ishikawa M, et al:Early and delayed assessments of quantitative gait measures to improve the tap test as a predictor of shunt effectiveness in idiopathic normal pressure hydrocephalus. Fluids Barriers CNS 13:20, 2016
24)Matsuoka T, et al:Characteristics of cognitive function evaluation using the Montreal cognitive assessment in a cerebrospinal fluid tap test in patients with idiopathic normal pressure hydrocephalus. Clin Neurol Neurosurg 186:105524, 2019
25)Kubo Y, et al:Validation of grading scale for evaluating symptoms of idiopathic normal-pressure hydrocephalus. Dement Geriatr Cogn Disord 25:37-45, 2008
26)Podsiadlo D, Richardson S:The timed “Up & Go”:a test of basic functional mobility for frail elderly persons. J Am Geriatr Soc 39:142-148, 1991
27)Walchenbach R, et al:The value of temporary external lumbar CSF drainage in predicting the outcome of shunting on normal pressure hydrocephalus. J Neurol Neurosurg Psychiatry 72:503-506, 2002
28)Akiguchi I, et al:Shunt-responsive parkinsonism and reversible white matter lesions in patients with idiopathic NPH. J Neurol 255:1392-1399, 2008
29)Hellström P, et al:The neuropsychology of iNPH:findings and evaluation of tests in the European multicentre study. Clin Neurol Neurosurg 114:130-134, 2012
30)Hellström P, et al:A new scale for assessment of severity and outcome in iNPH. Acta Neurol Scand 126:229-237, 2012
31)Wikkelsø C, et al;European iNPH Multicentre Study Group:The European iNPH Multicentre Study on the predictive values of resistance to CSF outflow and the CSF Tap Test in patients with idiopathic normal pressure hydrocephalus. J Neurol Neurosurg Psychiatry 84:562-568, 2013
32)Yamada S, et al:Timed up and go test at tap test and shunt surgery in idiopathic normal pressure hydrocephalus. Neurol Clin Pract 7:98-108, 2017
33)Nakajima M, et al:Tap test can predict cognitive improvement in patients with iNPH-results from the multicenter prospective studies SINPHONI-1 and -2. Front Neurol 12:769216, 2021
34)Haan J, Thomeer RT:Predictive value of temporary external lumbar drainage in normal pressure hydrocephalus. Neurosurgery 22:388-391, 1988
35)Børgesen SE:Conductance to outflow of CSF in normal pressure hydrocephalus. Acta Neurochir(Wien)71:1-45, 1984
36)Malm J, et al:Cerebrospinal fluid shunt dynamics in patients with idiopathic adult hydrocephalus syndrome. J Neurol Neurosurg Psychiatry 58:715-723, 1995
37)Malm J, et al:The predictive value of cerebrospinal fluid dynamic tests in patients with the idiopathic adult hydrocephalus syndrome. Arch Neurol 52:783-789, 1995
38)Miyajima M, et al:Soluble amyloid precursor protein α in the cerebrospinal fluid as a diagnostic and prognostic biomarker for idiopathic normal pressure hydrocephalus. Eur J Neurol 20:236-242, 2013
39)Moriya M, et al:Impact of cerebrospinal fluid shunting for idiopathic normal pressure hydrocephalus on the amyloid cascade. PLoS One 10:e0119973, 2015
40)Nakajima M, et al:Cerebrospinal fluid biomarkers for prognosis of long-term cognitive treatment outcomes in patients with idiopathic normal pressure hydrocephalus. J Neurol Sci 357:88-95, 2015
41)Akiba C, et al:Change of amyloid-β 1-42 toxic conformer ratio after cerebrospinal fluid diversion predicts long-term cognitive outcome in patients with idiopathic normal pressure hydrocephalus. J Alzheimers Dis 63:989-1002, 2018
42)Jeppsson A, et al:Idiopathic normal-pressure hydrocephalus:pathophysiology and diagnosis by CSF biomarkers. Neurology 80:1385-1392, 2013
43)Jeppsson A, et al:CSF biomarkers distinguish idiopathic normal pressure hydrocephalus from its mimics. J Neurol Neurosurg Psychiatry 90:1117-1123, 2019
44)Kawamura K, et al:Cerebrospinal fluid amyloid-β oligomer levels in patients with idiopathic normal pressure hydrocephalus. J Alzheimers Dis 83:179-190, 2021
45)Kokkinou M, et al:Plasma and cerebrospinal fluid ABeta42 for the differential diagnosis of Alzheimer's disease dementia in participants diagnosed with any dementia subtype in a specialist care setting. Cochrane Database Syst Rev 2:CD010945, 2021
46)Nakajima M, et al:Brain localization of leucine-rich α2-glycoprotein and its role. Acta Neurochir Suppl 113:97-101, 2012
47)Miyajima M, et al:Leucine-rich α2-glycoprotein is a novel biomarker of neurodegenerative disease in human cerebrospinal fluid and causes neurodegeneration in mouse cerebral cortex. PLoS One 8:e74453, 2013
48)Vanninen A, et al:Elevated CSF LRG and decreased Alzheimer's disease biomarkers in idiopathic normal pressure hydrocephalus. J Clin Med 10:1105, 2021
49)Nakajima M, et al:Protein tyrosine phosphatase receptor type Q in cerebrospinal fluid reflects ependymal cell dysfunction and is a potential biomarker for adult chronic hydrocephalus. Eur J Neurol 28:389-400, 2021
50)Nagata Y, et al:PTPRQ as a potential biomarker for idiopathic normal pressure hydrocephalus. Mol Med Rep 16:3034-3040, 2017
51)Mao C, et al:Cerebrospinal fluid Alzheimer's biomarkers and neurofilament light profile of idiopathic normal pressure hydrocephalus in China:a PUMCH Cohort Study. Neurodegener Dis 20:165-172, 2020
52)Pfanner T, et al:Cerebrospinal fluid biomarkers as predictors of shunt response in idiopathic normal pressure hydrocephalus:a systematic review. Can J Neurol Sci 45:3-10, 2018
53)Agren-Wilsson A, et al:CSF biomarkers in the evaluation of idiopathic normal pressure hydrocephalus. Acta Neurol Scand 116:333-339, 2007
54)Rohrer JD, et al:Serum neurofilament light chain protein is a measure of disease intensity in frontotemporal dementia. Neurology 87:1329-1336, 2016
55)Sun Q, et al:CSF neurofilament light chain elevation predicts ALS severity and progression. Front Neurol 11:919, 2020
56)Gaetani L, et al:Neurofilament light chain as a biomarker in neurological disorders. J Neurol Neurosurg Psychiatry 90:870-881, 2019
57)Nakajima M, et al:Preoperative phosphorylated Tau concentration in the cerebrospinal fluid can predict cognitive function three years after shunt surgery in patients with idiopathic normal pressure hydrocephalus. J Alzheimers Dis 66:319-331, 2018
58)Koivisto AM, et al;Kuopio NPH Registry(www.uef.finph):Poor cognitive outcome in shunt-responsive idiopathic normal pressure hydrocephalus. Neurosurgery 72:1-8;discussion 8, 2013
59)Nagata Y, et al:Comparative analysis of cerebrospinal fluid metabolites in Alzheimer's disease and idiopathic normal pressure hydrocephalus in a Japanese cohort. Biomark Res 6:5, 2018
C]PIB-PET imaging in idiopathic normal pressure hydrocephalus in relation to confirmed amyloid-β plaques and Tau in brain biopsies. J Alzheimers Dis 64:171-179, 2018
61)Kamohara C, et al:Neuropsychological tests are useful for predicting comorbidities of idiopathic normal pressure hydrocephalus. Acta Neurol Scand 142:623-631, 2020
62)Sakurai A, et al:Comorbid alpha synucleinopathies in idiopathic normal pressure hydrocephalus. J Neurol, 2021 [Online ahead of print] doi:10.1007/s00415-021-10778-1
63)Ishii K:Diagnostic imaging of dementia with Lewy bodies, frontotemporal lobar degeneration, and normal pressure hydrocephalus. Jpn J Radiol 38:64-76, 2020
64)Pozzi NG, et al:Striatal dopamine deficit and motor impairment in idiopathic normal pressure hydrocephalus. Mov Disord 36:124-132, 2021
65)Provost JS, et al:Neuroimaging studies of the striatum in cognition Part Ⅰ:healthy individuals. Front Syst Neurosci 9:140, 2015
66)Molde K, et al:Parkinsonian symptoms in normal pressure hydrocephalus:a population-based study. J Neurol 264:2141-2148, 2017
67)Malm J, et al:Influence of comorbidities in idiopathic normal pressure hydrocephalus - research and clinical care. A report of the ISHCSF task force on comorbidities in INPH. Fluids Barriers CNS 10:22, 2013