<unk>  is rare worldwide. No racial predilection is reported for<unk> . No sexual predilection is described for<unk> ; the male-to-female ratio is equal.<unk>  I <unk> -A) manifests in childhood.<unk>  II <unk> -B) manifests at birth or in infancy, and it has a worse prognosis.
Cockayne syndrome
Xeroderma pigmentosum
ATR-X syndrome
ATR-16 syndrome
Cornelia de Lange syndrome
MEDNIK syndrome
Treacher Collins syndrome
LIG4 syndrome