<unk>  (or<unk>  phenomenon) is a genetic disorder that may affect the blood, brain, peripheral nerves, muscle and heart. It is caused by a variety of recessively-inherited mutations in the XK gene on the X chromosome. The gene is responsible for producing a specific protein (Kell antigen) on the red blood cell surface.
McLeod syndrome
Baraitser-Reardon syndrome
Danon disease
Fox-Fordyce disease
Yunis-Varon syndrome
Townes-Brocks syndrome
Rotor syndrome
Tome-Brune-Fardeau syndrome