A novel XK gene mutation in a Taiwanese family with McLeod syndrome

Pei Yun Chen, Szu Chia Lai, Chih Chao Yang, Ming Jen Lee, Yen Hui Chiu, Sui Hing Yan, Chin Song Lu, Tu Hsueh Yeh

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


McLeod syndrome is one subtype of rare neuroacanthocytosis syndromes characterized by misshapen red blood cells and progressive degeneration of the basal ganglia. It is an X-linked recessive disorder with mutation in the XK gene of the Kell blood group system with multisystem involvements. Concerning the movement disorders, its dyskinesias are various and difficult to differentiate from those in Huntington's disease or other hyperkinetic movement disorders. In this report, we described a 62-year-old male patient presenting with insidious myalgia and muscle fatigue. Progressive motor restlessness and toes choreoathetosis were noted. Previously, he had chronic psychotic disorder with irregular treatment for 14 years. The laboratory tests revealed elevated creatine phosphokinase and acanthocytes (36.3%). The electrophysiological test demonstrated an axonal type polyneuropathy. The neuroimaging of brain showed striatal degeneration. Genetic analysis revealed a nonsense hemizygous mutation c.154C>T (p.Gln52X) at exon 1 of XK gene. The genetic counseling of his family revealed one elder brother carrying the same mutation and showing a similar but very mild syndrome. Several offspring were the asymptomatic carriers. We suggest that for a patient with multiple system disorders including dyskinetic movement disorders, psychiatric symptoms, polyneuropathy, and elevated CPK, a genetic test for XK gene mutation is highly indicated to confirm the McLeod syndrome and to guide the possible therapy.

Original languageEnglish
Pages (from-to)221-224
Number of pages4
JournalJournal of the Neurological Sciences
Issue number1-2
Publication statusPublished - May 15 2014
Externally publishedYes


  • Choreoathetosis
  • Creatine phosphokinase (CPK)
  • Kell blood group system
  • McLeod syndrome
  • Neuroacanthocytosis
  • XK gene

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Medicine(all)


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