JOURNAL ARTICLE

Progression of symptoms in the early and middle stages of Huntington disease

S C Kirkwood, J L Su, P Conneally, T Foroud
Archives of Neurology 2001, 58 (2): 273-8
11176966

OBJECTIVE: To delineate the progression of symptoms in the early and middle stages of Huntington disease (HD).

DESIGN: A survey of individuals with symptomatic HD completed by a first-degree relative.

SETTING: The National Huntington Disease Research Roster for Patients and Families, Indianapolis, Ind.

PARTICIPANTS: The survey included 1238 individuals with a minimum of a 6-year history of symptomatic HD.

MEASURES: Participating families completed a series of surveys, including the Affected Individual Questionnaire, which consists of 19 physical, emotional, and cognitive signs commonly thought to occur during disease progression. The respondent indicates if each of the symptoms occurred and, if so, at what time during the course of the disease: (1) within 1 year, (2) within 2 to 5 years, (3) within 6 to 10 years, (4) after more than 10 years, (5) has not occurred, or (6) "don't know."

RESULTS: The symptoms are categorized into 6 onset periods. Involuntary movements are grouped alone as the earliest reported symptom. The second group is composed entirely of mental and emotional symptoms, including sadness, depression, and difficult to get along with. The third group includes clumsiness, sexual problems, lack of motivation, and suspiciousness/paranoia. As the disease progresses, a variety of motor, emotional/behavioral, and cognitive symptoms are experienced, including unsteadiness, trouble holding onto things, trouble walking, changes in sleeping patterns, delusions and hallucinations, intellectual decline, and memory loss. With the approach of late-stage HD, affected individuals begin to experience speech difficulty and weight loss. In the late stage, patients lose bowel and bladder control.

CONCLUSIONS: Even though the symptoms of HD are fairly well characterized, their progression, especially in the early and middle stages, remains uncertain. Clarification of the disease progression is vital to improved understanding of the pathogenesis of HD and to the evaluation of therapeutic agents that are designed to slow the progression of disease. The results of this study assist in clarifying HD progression from early involuntary movements and emotional changes to more overt motor symptoms and difficulty with activities of daily living.

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