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Early onset dystonia v1.128 XK Sarah Leigh Classified gene: XK as Red List (low evidence)
Early onset dystonia v1.128 XK Sarah Leigh Gene: xk has been classified as Red List (Low Evidence).
Early onset dystonia v1.127 XK Sarah Leigh edited their review of gene: XK: Changed rating: RED
Early onset dystonia v1.127 XK Sarah Leigh reviewed gene: XK: Rating: AMBER; Mode of pathogenicity: None; Publications: ; Phenotypes: ; Mode of inheritance: None
Early onset dystonia v1.127 XK Sarah Leigh Publications for gene: XK were set to 11761473; 8004674; 11032622; 11261514
Early onset dystonia v1.126 XK Sarah Leigh Publications for gene: XK were set to 11761473; 11761473
Early onset dystonia v1.88 XK Ivone Leong Phenotypes for gene: XK were changed from McLeod syndrome with or without chronic granulomatous disease OMIM 300842 to McLeod syndrome with or without chronic granulomatous disease,OMIM:300842
Early onset dystonia v1.81 XK Louise Daugherty Classified gene: XK as Green List (high evidence)
Early onset dystonia v1.81 XK Louise Daugherty Gene: xk has been classified as Green List (High Evidence).
Early onset dystonia v1.80 XK Rachel Jones gene: XK was added
gene: XK was added to Early onset dystonia. Sources: Literature
Mode of inheritance for gene: XK was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: XK were set to 11761473; 11761473
Phenotypes for gene: XK were set to McLeod syndrome with or without chronic granulomatous disease OMIM 300842
Penetrance for gene: XK were set to Incomplete
Review for gene: XK was set to GREEN
gene: XK was marked as current diagnostic
Added comment: Several publications including those given above regarding this well characterised link between XK gene and McLeod syndrome in many patients. Phenotype is acanthosis, haemolysis and elevated CK. Neurological phenotype (from OMIM) "Onset of neurologic symptoms ranges between 25 and 60 years (mean onset 30-40 years), and penetrance appears to be high. Additional symptoms include generalized seizures, neuromuscular symptoms leading to weakness and atrophy, and cardiomyopathy mainly manifesting with atrial fibrillation, malignant arrhythmias, and dilated cardiomyopathy"

Testing not currently offered by UK labs but several accredited European laboratories are offering testing.
Sources: Literature