A 6-year-old with leg cramps

Brian P. Jenssen*, Andrew J. Lautz, Jennifer L. Orthmann-Murphy, Sabrina W. Yum, Angela Jae Waanders, Elizabeth Fox

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review


A 6-year-old girl presented with a history of leg pain and cramping that progressively worsened over a 2- to 3-week period of time. Her examination was notable for normal vital signs, limited range of motion of her left hip, and a limp. Inflammatory markers were slightly elevated, but the serum electrolytes, calcium, and magnesium, complete blood cell count and differential, and creatine kinase level were normal. She was hospitalized for further diagnostic evaluation and was noted to have abnormal muscle movements classified as myokymia (continuous involuntary quivering, rippling, or undulating movement of muscles). Electromyography confirmed the myokymia but did not reveal evidence of a myopathy or neuropathy, prompting additional evaluation for a systemic etiology.

Original languageEnglish (US)
Pages (from-to)732-739
Number of pages8
Issue number4
StatePublished - Oct 1 2015

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health


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