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Surgical treatment of idiopathic hydrocephalus in elderly patients

Departments of Neurology (Drs. Petersen and Mokri) and Neurologic Surgery (Dr. Laws), Mayo Clinic and Mayo Foundation, Rochester, MN.

We studied 45 adult patients with idiopathic hydrocephalus who had undergone a shunting procedure at the Mayo Clinic during a 16-year period. The follow-up period extended up to 157 months. Thirty-four of the 45 patients (75%) improved at some time after the operation, and 19 (42%) experienced continuous improvement. The median duration of improvement was 24 months. Patients who had symptoms for less than 2 years were most likely to improve. CT played an important role in the diagnosis and follow-up, but ventricular size or degree of atrophy did not correlate with response.

Address correspondence and reprint requests to Dr. Petersen, c/o Section of Publications, Mayo Clinic and Mayo Foundation, Rochester, MN 55905.

Accepted for publication June 28, 1984.

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