OMIM :
56
Hypotrichosis simplex refers to a group of hereditary isolated alopecias characterized by diffuse and progressive hair loss, usually beginning in early childhood (Pasternack et al., 2008). Localized autosomal recessive hypotrichosis (LAH) is characterized by fragile hairs that break easily, leaving short, sparse scalp hairs. The disorder affects the trunk and extremities as well as the scalp, and the eyebrows and eyelashes may also be involved, whereas beard, pubic, and axillary hairs are largely spared. In addition, patients can develop hyperkeratotic follicular papules, erythema, and pruritus in affected areas (summary by Schaffer et al., 2006).
Woolly hair (WH) refers to a group of hair shaft disorders that are characterized by fine and tightly curled hair. Compared to normal curly hair that is observed in some populations, WH grows slowly and stops growing after a few inches. Under light microscopy, WH shows some structural anomalies, including trichorrhexis nodosa and tapered ends (summary by Petukhova et al., 2009). Several families have been reported in which some affected individuals exhibit features of hypotrichosis and others have woolly scalp hair (Khan et al., 2011).
Woolly hair is also a feature of several syndromes, such as Naxos disease (601214) and cardiofaciocutaneous syndrome (115150) (Petukhova et al., 2009), or the palmoplantar keratoderma and cardiomyopathy syndrome (601214) (Carvajal-Huerta, 1998).
(278150)
MalaCards based summary :
Hypotrichosis 8, also known as
hypt8, is related to
hypotrichosis 6 and
hypotrichosis simplex. An important gene associated with Hypotrichosis 8 is
LPAR6 (Lysophosphatidic Acid Receptor 6), and among its related pathways/superpathways is
Keratinization. Related phenotypes are
sparse scalp hair and
woolly hair
Disease Ontology :
12
A hypotrichosis has material basis in a autosomal recessive mutation of LPAR6 on chromosome 13q14.2.
UniProtKB/Swiss-Prot :
73
Hypotrichosis 8: A condition characterized by the presence of less than the normal amount of hair and abnormal hair follicles and shafts, which are thin and atrophic. The disorder affects the trunk and extremities as well as the scalp, and the eyebrows and eyelashes may also be involved, whereas beard, pubic, and axillary hairs are largely spared. In addition, patients can develop hyperkeratotic follicular papules, erythema, and pruritus in affected areas. In some patients with congenital hypotrichosis, monilethrix-like hairs showing elliptical nodes have been observed.
Woolly hair autosomal recessive 1 with or without hypotrichosis: A hair shaft disorder characterized by fine and tightly curled hair. Compared to normal curly hair that is observed in some populations, woolly hair grows slowly and stops growing after a few inches. Under light microscopy, woolly hair shows some structural anomalies, including trichorrhexis nodosa and tapered ends. Some individuals exhibit features of hypotrichosis.
