• Shunt-responsive normal-pressure hydrocephalus developed in a 67-year-old man and in his 74-year-old sister. To our knowledge, a familial association in this disorder has not been reported previously.
Portenoy RK, Berger A, Gross E. Familial Occurrence of Idiopathic Normal-Pressure Hydrocephalus. Arch Neurol. 1984;41(3):335–337. doi:10.1001/archneur.1984.04050150117029
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