| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Follicular keratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Multiple minute digitate hyperkeratosis of Goldstein | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Pityriasis rotunda | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Bowenoid actinic keratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Transient acantholytic dermatosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hyperkeratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Acrokeratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Keratosis pilaris | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Acquired acanthosis nigricans | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Porokeratosis of Mibelli | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Acquired ichthyosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Confluent AND reticulate papillomatosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Acquired keratosis follicularis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| [X]Keratoderma in diseases classified elsewhere | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| [X]Hypertrophic disorder of skin, unspecified | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hyperkeratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Arsenical keratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Actinic keratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Acral keratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Orthokeratosis | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Superficial keratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Acquired disorder of keratinization | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Benign acanthosis nigricans | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Spinocerebellar ataxia type 34 | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Vitamin A deficiency with xeroderma | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Skin peeling disorder | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hereditary acantholytic dermatosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Xeroderma of eyelid | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Knuckle pads, leukonychia, sensorineural deafness, palmoplantar hyperkeratosis syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Porokeratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Ectodermal dysplasia with acanthosis nigricans syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Familial benign pemphigus | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Xeroderma pigmentosum | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Ichthyosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Inverted follicular keratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Senile xeroderma | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Trichodysplasia xeroderma syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hypotrichosis and deafness syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hyperkeratotic eczema of soles | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Drug-induced ichthyosiform reaction | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Pityriasis rubra pilaris | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Acrokeratosis verruciformis of Hopf | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Congenital keratoderma | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| No hyperkeratosis | Associated finding | True | Keratosis | Inferred relationship | Existential restriction modifier | 1 | 
| Leukokeratosis of skin | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Skin fragility, wooly hair, palmoplantar keratoderma syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Focal palmoplantar keratoderma with joint keratoses | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Diffuse palmoplantar keratoderma with painful fissures | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Autosomal dominant focal non-epidermolytic palmoplantar keratoderma with plantar blistering | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Leukoencephalopathy, palmoplantar keratoderma syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hypohidrosis, enamel hypoplasia, palmoplantar keratoderma, intellectual disability syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Corneal intraepithelial dyskeratosis, palmoplantar hyperkeratosis, laryngeal dyskeratosis syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Palmoplantar keratoderma, spastic paralysis syndrome | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Subungual hyperkeratosis | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Leukedema of mouth | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Keratosis obturans of external ear canal | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Smokeless tobacco keratosis | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Leukoplakia of male genital organs | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Vitamin A deficiency with follicular keratosis | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Cholesteatoma of middle ear and mastoid structure | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hypertyrosinemia, Richner-Hanhart type | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Oral lichenoid reaction | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Leukokeratosis nicotina palati | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Cholesteatoma | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hyperkeratosis of nipple | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Hyperkeratosis of mucous membrane of mouth due to and following traumatic injury | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Actinic cheilitis | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Leukoplakia of vocal cords | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Leukoplakia of female genital organs | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Leukoplakia | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Leukokeratosis | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Oral frictional keratosis | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Keratoderma | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Mastoid cholesteatoma | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Lichen sclerosus | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| Cholesteatoma of orbit | Is a | True | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| [X]Keratoderma in diseases classified elsewhere | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  | 
| [X]Hypertrophic disorder of skin, unspecified | Is a | False | Keratosis | Inferred relationship | Existential restriction modifier |  |