Fj. Samaha et Jg. Quinlan, MYALGIA AND CRAMPS - DYSTROPHINOPATHY WITH WIDE-RANGING LABORATORY FINDINGS, Journal of child neurology, 11(1), 1996, pp. 21-24
We present 12 cases of males with myalgia and cramps and a normal musc
le strength examination. All the patients had muscle dystrophin values
consistent with Becker muscular dystrophy, Five of the patients had a
normal electromyogram, and five had normal light microscopic muscle b
iopsy results. Of particular note, four of the 12 patients had normal
serum creatine kinase levels, and four others had only mild elevations
(less than twice the upper limit of normal). These patients establish
an identifiable dystrophinopathy of adolescent boys and young men tha
t can present with muscle pain and, in some cases, normal routine labo
ratory evaluations.