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Abstract
[...]terminologies or medical words starting with "trich" are related to hair more often than not. [...]there are also "trichs" which are unrelated to hair. Since the terminologies are extensive and are spread across the literature related and unrelated to hair, authors have attempted to arbitrarily classify and club these into various groups for the sake of convenience. The classical form is characterized by five clinical signs: intractable diarrhea of infancy beginning in the 1st month of life; facial dysmorphism characterized by prominent forehead and cheeks, broad nasal root and hypertelorism; hair abnormalities described as woolly and easily removable hair; immune disorders and intrauterine growth restrictionTricho-odonto-onycho-dermal syndrome[32] - It is a rare form of autosomal recessive ectodermal dysplasia involving hair, teeth, nails and skin characterized by hair anomalies such as hypotrichosis and slow-growing hair, hypodontia, smooth tongue with marked reduction of filiform and fungiform papillae, nail dysplasia, dry skin, palmoplantar keratoderma and hyperhidrosis of palms and solesTricho-retino-dento-digital syndrome[33] - It is an autosomal dominant ectodermal dysplasia syndrome, characterized by uncombable hair, congenital hypotrichosis and dental abnormalities such as oligodontia or hyperdontia and associated with early-onset cataract, retinal pigmentary dystrophy and brachydactyly & brachymetacarpiaTricho-rhino-phalangeal syndrome[34] - It is characterized by craniofacial and skeletal abnormalities. Hypoplasia of the first metacarpal and metatarsal bones and distal phalanges of the toes may also occurManitoba-oculo-tricho-anal syndrome[38] - It is a rare condition defined by eyelid colobomas, cryptophthalmos and anophthalmia/microphthalmia, triangular growths of hair extending from scalp to eyebrow, a bifid or broad nasal tip and gastrointestinal anomalies such as omphalocele and anal stenosisTricho-oculo-dermo-vertebral syndrome (Alves syndrome)[39] - It is characterized by dry sparse, brittle hair, dystrophic nails, plantar keratoderma, short stature, and cataractTrichodental syndrome[40] - It is inherited in an autosomal dominant fashion and is characterized by the association of fine, dry and short hair with dental anomaliesTrichodysplasia-amelogenesis imperfecta[41] - The association of amelogenesis imperfecta and a microscopically typical hair dysplasia has been found in several members of a family in two generationsOculo-tricho-dysplasia neutropenic syndrome[42] - It is a form of trichothiodystrophy characterized by hypoplastic fingernails, trichorrhexis, chronic neutropenia and mild psychomotor retardationTrichomegaly-retina pigmentary degeneration-dwarfism syndrome[43] - It is characterized by growth retardation, alopecia, abnormally long eyelashes and retinitis pigmentosa and moderate intellectual deficit in the majority of cases.