Alternative titles and symbols : Ciliary dyskinesia, primary, 5, without situs inversus;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the HYDIN axonemal central pair apparatus protein gene (HYDIN,
610812.0001);
Laboratory abnormalities : Respiratory cilia and sperm flagella show reduced coordination of beating activity; Rare occurrences of 9 0 or 8 1 cilia; High-resolution electron microscopy tomography shows absence of projection C2b at
the central pair (CP) apparatus of cilia; Transmission electron microscopy (TEM) of patient respiratory cilia shows normal 9
2 axonemal composition; Reduced beating amplitudes in cilia; Reduced bending capacity of cilia;