Premium
Benign monomelic amyotrophy of lower limb: report of three cases
Author(s) -
Uncini A.,
Servidei S.,
Pizzi C. Delli,
Cutarella R.,
Muzio A. Di,
Gambi D.,
Tonali P.
Publication year - 1992
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.1992.tb06035.x
Subject(s) - amyotrophy , medicine , lower motor neuron , atrophy , spinal muscular atrophy , wasting , lumbar , electromyography , progressive muscular atrophy , muscle atrophy , amyotrophic lateral sclerosis , anatomy , pathology , disease , physical medicine and rehabilitation
Three patients with wasting confined to a single lower limb are reported. The characteristic features were: sporadic occurrence, insidious onset with slow progression and in 2 cases arrested course for at least 4 years, wasting out of proportion with disability, absence of sensory, pyramidal tract or bulbar signs. CK, motor and sensory conductions, and lumbar MRI were normal. Muscle CT showed selective loss of muscle tissue and fat replacement in posterior leg muscles. Quantitative electromyography and histologic findings revealed neurogenic features not only in the affected legs, but also in clinically uninvolved limbs. Monomelic amyotrophy of lower limb is a variant of spinal muscular atrophy with a benign course. However, as in the early stages of the disease there are no distinctive clinical or laboratory findings with other motor neuron diseases, the diagnosis of monomelic amyotrophy may be made only retrospectively after a prolonged observation.