[Quadriceps myopathy or amyotrophic quadriceps syndrome. Nosologic study apropos of 10 cases].

Quadricipital myopathies are often mentioned but have been described in only about 10 papers. Based on a review of the literature and 10 personal cases, the term "quadricipital amyotrophic syndrome" is proposed for a group of affections which can currently be divided into: 1) primary muscular dystrophies: pure quadricipital myopathy, quadricipital myopathy "plus", lumbopelvifemoral myopathy though it is doubtful whether the latter should be included; 2) metabolic muscular disorders; 3) chronic polymyositis localized to the quadriceps; 4) spinal amyotrophy localized to the quadriceps.