Ectodermal Dysplasia 9, Hair/nail Type (ECTD9)

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OMIM 58 614931 MeSH 45 D004476 MedGen 43 C3554127 CN160610

SNOMED-CT via HPO 70 254154003 258211005 53602002 56558005 66270006 8654005 87065009 more UMLS 74 C3554127

UniProtKB/Swiss-Prot : ⁷⁶ Ectodermal dysplasia 9, hair/nail type: A form of ectodermal dysplasia, a heterogeneous group of disorders due to abnormal development of two or more ectodermal structures such as hair, teeth, nails and sweat glands, with or without any additional clinical sign. Each combination of clinical features represents a different type of ectodermal dysplasia. ECTD9 is characterized by hypotrichosis and nail dystrophy without non-ectodermal or other ectodermal manifestations. Hypotrichosis usually occurs after birth with varying degrees of severity, ranging from mild hair loss to complete atrichia, including the loss of scalp hair, beard, eyebrows, eyelashes, axillary hair, and pubic hair. Nail dystrophy affects all 20 digits by causing short fragile nails or spoon nails (koilonychia).

MalaCards based summary : Ectodermal Dysplasia 9, Hair/nail Type, also known as ectd9, is related to ectodermal dysplasia 4, hair/nail type and ectodermal dysplasia. An important gene associated with Ectodermal Dysplasia 9, Hair/nail Type is HOXC13 (Homeobox C13). Affiliated tissues include skin and eye, and related phenotypes are nail dystrophy and hypotrichosis

OMIM : ⁵⁸ Some ectodermal dysplasias are here classified as congenital disorders characterized by abnormal development in 2 or more ectodermal structures (hair, nails, teeth, and sweat glands) without other systemic findings. Ectodermal dysplasia of the hair/nail type is a rare congenital condition characterized by hypotrichosis and nail dystrophy without nonectodermal or other ectodermal manifestations. Hypotrichosis usually occurs after birth with varying degrees of severity, ranging from mild hair loss to complete atrichia, including the loss of scalp hair, beard, eyebrows, eyelashes, axillary hair, and pubic hair. Nail dystrophy affects all 20 digits by causing short fragile nails or spoon nails (koilonychia) (summary by Lin et al., 2012). (614931)

Clinical features from OMIM:

614931

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