| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Inherited deformity of nail (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Pachyonychia congenita syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Anonychia with bizarre flexural pigmentation | Is a | False | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Pili torti onychodysplasia syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Brachymorphism with onychodysplasia and dysphalangism syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Nail dystrophy due to Darier's disease (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Severe T-cell immunodeficiency, congenital alopecia, nail dystrophy syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Oto-onycho-peroneal syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Autosomal recessive nail dysplasia | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Trichoodontoonychial dysplasia | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Dystrophic epidermolysis bullosa nails only (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Cooks syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Nail-patella syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hypotrichosis and deafness syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Short stature, onychodysplasia, facial dysmorphism, hypotrichosis syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hirschsprung disease with nail hypoplasia and dysmorphism (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hidrotic ectodermal dysplasia Christianson Fourie type (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hidrotic ectodermal dysplasia Halal type (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Temple Baraitser syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Anonychia with microcephaly syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Deafness, enamel hypoplasia, nail defect syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Mammary digital nail syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Leukonychia totalis, acanthosis-nigricans-like lesions, abnormal hair syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Knuckle pads, leukonychia, sensorineural deafness, palmoplantar hyperkeratosis syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Deafness with onychodystrophy syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Nail and tooth abnormalities, marginal palmoplantar keratoderma, oral hyperpigmentation syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Schinzel-Giedion syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hypohidrotic X-linked ectodermal dysplasia | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Odontotrichomelic syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hereditary striate leuconychia (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hidrotic ectodermal dysplasia syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Autosomal dominant hypohidrotic ectodermal dysplasia syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Acro-dermato-ungual-lacrimal-tooth syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Dermatoosteolysis Kirghizian type (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Dermo-odonto dysplasia (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Oculotrichodysplasia (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Stern Lubinsky Durrie syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Ectodermal dysplasia trichoodontoonychial type (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hypotrichosis, osteolysis, periodontitis, palmoplantar keratoderma syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Curly hair, acral keratoderma, caries syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Arthrogryposis and ectodermal dysplasia syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Autosomal recessive hypohidrotic ectodermal dysplasia syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Alopecia, onychodysplasia, hypohidrosis, deafness ectodermal dysplasia | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hereditary clubbing | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hereditary lymphedema and yellow nails (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hypodontia and nail dysgenesis | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Pachydermoperiostosis syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Curry-Hall syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Split-foot malformation, mesoaxial polydactyly syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Incontinentia pigmenti syndrome | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Pigmentation defects, palmoplantar keratoderma, skin carcinoma syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Peeling skin, leukonychia, acral punctate keratoses, cheilitis, knuckle pads syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Hereditary distal onycholysis | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Congenital isolated onychodysplasia | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  | 
| Ectodermal dysplasia, hyperhidrosis, cutaneous syndactyly syndrome (disorder) | Is a | True | Genetic disorder of nail (disorder) | Inferred relationship | Some |  |