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Low yield in screening patients with sporadic motor neuron disease for Kennedy disease
Author(s) -
Saunderson R. B.,
Yu B.,
Trent R. J. A.,
Pamphlett R.
Publication year - 2007
Publication title -
internal medicine journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.596
H-Index - 70
eISSN - 1445-5994
pISSN - 1444-0903
DOI - 10.1111/j.1445-5994.2007.01499.x
Subject(s) - motor neuron , medicine , disease , weakness , upper motor neuron , lower motor neuron , physical medicine and rehabilitation , pediatrics , amyotrophic lateral sclerosis , surgery
The diagnostic yield of testing for Kennedy disease in patients diagnosed with sporadic motor neuron disease (MND) is unclear. We measured the CAG repeat lengths in the androgen receptor gene of patients with progressive limb weakness who had either upper and lower motor signs ( n = 130), or lower motor neuron signs alone ( n = 30). Only one patient with a long history of lower motor weakness had a repeat length in the Kennedy disease range. Testing for Kennedy disease is unlikely to benefit MND patients with upper motor neuron signs or those with a short history of lower motor signs.