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Focal dermal hypoplasia
Focal dermal hypoplasia is a multisystem disorder characterized primarily by involvement of the skin, skeletal system, eyes, and face. Skin manifestations present at birth include atrophic and hypoplastic areas of skin; cutis aplasia; fat nodules in the dermis manifesting as soft, yellow-pink cutaneous nodules; and pigmentary changes. Verrucoid papillomas of the skin and mucous membranes may appear later. The nails can be ridged, dysplastic, or hypoplastic; hair can be sparse or absent. Limb malformations include oligo-/syndactyly and split hand/foot. Developmental abnormalities of the eye can include anophthalmia/microphthalmia, iris and chorioretinal coloboma, and lacrimal duct abnormalities. Craniofacial findings can include facial asymmetry, notched alae nasi, cleft lip and palate, and pointed chin. Occasional findings include dental anomalies, abdominal wall defects, diaphragmatic hernia, and renal anomalies. Psychomotor development is usually normal; some individuals have cognitive impairment. [from GeneReviews]
Ectrodactyly, ectodermal dysplasia, and cleft lip-palate syndrome 3
The TP63-related disorders comprise six overlapping phenotypes: Ankyloblepharon-ectodermal defects-cleft lip/palate (AEC) syndrome (which includes Rapp-Hodgkin syndrome). Acro-dermo-ungual-lacrimal-tooth (ADULT) syndrome. Ectrodactyly, ectodermal dysplasia, cleft lip/palate syndrome 3 (EEC3). Limb-mammary syndrome. Split-hand/foot malformation type 4 (SHFM4). Isolated cleft lip/cleft palate (orofacial cleft 8). Individuals typically have varying combinations of ectodermal dysplasia (hypohidrosis, nail dysplasia, sparse hair, tooth abnormalities), cleft lip/palate, split-hand/foot malformation/syndactyly, lacrimal duct obstruction, hypopigmentation, hypoplastic breasts and/or nipples, and hypospadias. Findings associated with a single phenotype include ankyloblepharon filiforme adnatum (tissue strands that completely or partially fuse the upper and lower eyelids), skin erosions especially on the scalp associated with areas of scarring, and alopecia, trismus, and excessive freckling. [from GeneReviews]
ADULT syndrome
Split hand-foot malformation 1
Split-hand/foot malformation (SHFM) is a limb malformation involving the central rays of the autopod and presenting with syndactyly, median clefts of the hands and feet, and aplasia and/or hypoplasia of the phalanges, metacarpals, and metatarsals. Some patients with SHFM1 have been found to have mental retardation, ectodermal and craniofacial findings, orofacial clefting (Elliott and Evans, 2006), and neurosensory hearing loss (Tackels-Horne et al., 2001). Genetic Heterogeneity of Split-Hand/Foot Malformation Additional SHFM loci include SHFM2 (313350) on chromosome Xq26; SHFM3 (246560), caused by duplication of chromosome 10q24; SHFM4 (605289), caused by mutation in the TP63 gene (603273) on chromosome 3q28; SHFM5 (606708) on chromosome 2q31; and SHFM6 (225300), caused by mutation in the WNT10B gene (601906) on chromosome 12q13. Also see SHFM1D (220600) for a form of SHFM1 with deafness that may be caused by homozygous mutation in the DLX5 gene (600028). Associations Pending Confirmation For discussion of a possible association between split-hand/foot malformation and variation in the EPS15L1 gene, see 616826.0001. [from OMIM]
Split hand-foot malformation 4
Limb-mammary syndrome
Ectrodactyly, ectodermal dysplasia, and cleft lip-palate syndrome 1
An EEC syndrome characterized by autosomal dominant inheritance that has material basis in variation in the chromosome region 7q11.2-q21.3. [from MONDO]
Split hand-foot malformation 6
Split-hand/split-foot malformation (SHFM) is a limb malformation involving the central rays of the autopod and presenting with syndactyly, median clefts of the hands and feet, and aplasia and/or hypoplasia of the phalanges, metacarpals, and metatarsals. Some patients with SHFM have been found to have mental retardation, ectodermal and craniofacial findings, and orofacial clefting (Elliott and Evans, 2006). For a general phenotypic description and a discussion of genetic heterogeneity of split-hand/foot malformations, see SHFM1 (183600). [from OMIM]
Split hand-foot malformation 1 with sensorineural hearing loss
Split-hand/foot malformation-1 with sensorineural hearing loss (SHFM1D) is an autosomal recessive disorder characterized by severe limb defects and moderate to severe hearing loss. There is nearly complete palmar dorsalization, with circumferential fingernails (Shamseldin et al., 2012). For a general phenotypic description and a discussion of genetic heterogeneity of split-hand/foot malformation, see SHFM1 (183600). [from OMIM]
Split-hand/foot malformation with long bone deficiency 1
Split-foot malformation-mesoaxial polydactyly syndrome
Split-foot malformation with mesoaxial polydactyly (SFMMP) is characterized by a split-foot defect and nail abnormalities of the hands, as well as hearing loss in some patients (Spielmann et al., 2016). [from OMIM]
Fibular aplasia-ectrodactyly syndrome
Ectrodactyly (split-hand/foot malformation) associated with fibular hypoplasia/aplasia is a rare disorder that appears to be inherited in an autosomal dominant fashion with reduced penetrance and variable expression (Evans et al., 2002). A form of fibular hypoplasia/aplasia associated with oligosyndactyly and tibial campomelia has been reported (FATCO syndrome; 246570). Split-hand/foot malformation associated with tibial hypoplasia/aplasia has also been described (see SHFLD1, 119100). [from OMIM]
ACCES syndrome
Aplasia cutis congenita and ectrodactyly skeletal syndrome (ACCES) is characterized by highly variable expressivity, even within the same family. Most patients exhibit scalp defects, whereas ectrodactyly is less common; however, more variable and less obvious digital and skeletal anomalies are often present. Early growth deficiency and neurodevelopmental delay are also commonly seen (Schnur et al., 2021). [from OMIM]
Acro-renal-mandibular syndrome
A very rare multiple congenital anomalies syndrome with characteristics of limb deficiencies and renal anomalies that include split hand-split foot malformation, renal agenesis, polycystic kidneys, uterine anomalies and severe mandibular hypoplasia. [from SNOMEDCT_US]
Split hand-foot malformation 2
Split-hand/split-foot malformation is a limb malformation involving the central rays of the autopod and presenting with syndactyly, median clefts of the hands and feet, and aplasia and/or hypoplasia of the phalanges, metacarpals, and metatarsals (Elliott and Evans, 2006). For additional phenotypic information and a discussion of genetic heterogeneity of split-hand/split-foot malformation, see SHFM1 (183600). [from OMIM]
Brachyphalangy, polydactyly, and tibial aplasia/hypoplasia
MMEP syndrome
A congenital syndromic form of split-hand/foot malformation with features of microcephaly, microphthalmia, ectrodactyly of the lower limbs and prognathism. Intellectual deficit has been reported. MMEP syndrome is considered to be a very rare condition. Disruption of the sorting nexin 3 gene (SNX3; 6q21) has been shown to play a causative role in MMEP. [from SNOMEDCT_US]
Patterson-Stevenson-Fontaine syndrome
A very rare variant of acrofacial dysostosis with characteristics of mandibulofacial dysostosis and limb anomalies. It has been described in less than ten patients. The mandibulofacial dysostosis consists of retrognathism, complete or occult posterior cleft palate and anomalies of the external ears. Limb anomalies consist of split-foot deformity with syndactyly of some toes. The condition is transmitted as an autosomal dominant trait with variable penetrance and expressivity. [from SNOMEDCT_US]
Tetramelic monodactyly
A rare genetic congenital limb malformation disorder with characteristics of the presence of a single digit on all four extremities. The malformation is typically isolated however, aplastic and hypoplastic defects in the remaining skeletal parts of hands and feet have been reported. There have been no further descriptions in the literature since 1992. [from SNOMEDCT_US]
Triphalangeal thumbs-brachyectrodactyly syndrome
This syndrome has characteristics of triphalangeal thumbs and brachydactyly of the hands. Ectrodactyly of the feet and, more rarely, ectrodactyly of the hands were also reported in some family members. Transmission is autosomal dominant. [from SNOMEDCT_US]
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