Hypotrichosis 13, also known as hypotrichosis with woolly hair, is related to woolly hair, autosomal recessive 3 and hypotrichosis 1. An important gene associated with Hypotrichosis 13 is KRT71 (Keratin 71), and among its related pathways/superpathways are PI3K-Akt signaling pathway and Tyrosine Kinases / Adaptors. Related phenotypes are sparse hair and woolly hair