| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Leukoencephalopathy, palmoplantar keratoderma syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Palmoplantar keratoderma, 46,XX sex reversal, predisposition to squamous cell carcinoma syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Woolly hair and palmoplantar keratoderma with dilated cardiomyopathy syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 4 | 
| Intellectual disability, enteropathy, deafness, peripheral neuropathy, ichthyosis, keratoderma syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Naxos disease | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Cerebral dysgenesis, neuropathy, ichthyosis, palmoplantar keratoderma syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Palmoplantar keratoderma with clinodactyly syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Autosomal dominant palmoplantar keratoderma and congenital alopecia (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Porokeratosis of Mibelli | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Haim Munk syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Hypohidrosis, enamel hypoplasia, palmoplantar keratoderma, intellectual disability syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Corneal intraepithelial dyskeratosis, palmoplantar hyperkeratosis, laryngeal dyskeratosis syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Autosomal recessive ichthyosis (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis prematurity syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Non-bullous ichthyosiform erythroderma | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Congenital ichthyosis of skin | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Syndromic recessive X-linked ichthyosis (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Limb reduction-ichthyosis syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Bullous ichthyosis | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Sclerosing dysplasia of bone, ichthyosis, premature ovarian failure syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Bullous ichthyosiform erythroderma (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Cutaneous syndrome with ichthyosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Follicular ichthyosis | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Senter syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Ichthyosis bullosa of Siemens | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis hystrix of Curth-Macklin | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Keratoderma hereditarium mutilans with ichthyosis syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis cheek eyebrow syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Autosomal dominant ichthyosis vulgaris | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Congenital ichthyosis with hypotrichosis syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Ichthyosis hystrix Bäfverstedt type (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| X-linked intellectual disability, hypogonadism, ichthyosis, obesity, short stature syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Ichthyosis hystrix | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichtyose hystrix gravior de Rheydt | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Bathing suit ichthyosis (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis, oral and digital anomalies syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| ichtyose Hystrix avec la surdité | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis congenita with biliary atresia | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| homme de la Porcupine | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Keratinopathic ichthyosis (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Keratitis ichthyosis and deafness syndrome (disorder) | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Netherton's syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Atypical ichthyosis vulgaris with hypogonadism | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| X-linked ichthyosis with steryl-sulfatase deficiency | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Proliferative hyperkeratosis | Is a | True | Hyperkeratosis | Inferred relationship | Some |  | 
| Lamellar ichthyosis AND trichorrhexis invaginata syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis linearis circumflexa | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Annular epidermolytic ichthyosis (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Congenital non bullous ichthyosiform erythroderma | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Sjögren-Larsson syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis, cerebellar degeneration and hepatosplenomegaly (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Harlequin ichthyosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Autosomal recessive keratitis-ichthyosis-deafness syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis, intellectual disability, dwarfism, renal impairment syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Ichthyosis vulgaris | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Localised bullous ichthyosiform erythroderma | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis follicularis with alopecia and photophobia (IFAP) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Severe ichthyoses | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Autosomal recessive exfoliative ichthyosis (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Autosomal dominant ichthyosis (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Rud's syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Neonatal sclerosing cholangitis, ichthyosis, hypotrichosis syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Congenital cataract ichthyosis syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Diffuse palmoplantar keratoderma with painful fissures | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Skin fragility, wooly hair, palmoplantar keratoderma syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Focal palmoplantar keratoderma with joint keratoses (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Inflammatory hyperkeratotic dermatosis, chronic | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Inflammatory hyperkeratotic dermatosis, isomorphous | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Inflammatory hyperkeratotic dermatosis, annular | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Inflammatory hyperkeratotic dermatosis, plaque | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Inflammatory hyperkeratotic dermatosis, generalized exfoliative | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Inflammatory hyperkeratotic dermatosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Acquired ichthyosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Ichthyosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Senile ichthyosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Palmoplantar keratoderma, spastic paralysis syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Haber's syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Ichthyosis, short stature, brachydactyly, microspherophakia syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Autosomal dominant focal non-epidermolytic palmoplantar keratoderma with plantar blistering | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Howel-Evans' syndrome | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Acrokerato-elastoidosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Acrokerato-elastoidosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 4 | 
| Porokeratosis of Mibelli, plaque type | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 6 | 
| keratoderma areata | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Symmetrical keratoderma | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Keratoderma climactericum | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Sublingual keratosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Callosity on toe | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Oral frictional keratosis | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Mutilating keratoderma | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Prayer nodule | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Multiple minute digitate hyperkeratosis of Goldstein | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Pityriasis rotunda | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 1 | 
| Autosomal dominant mutilating keratoderma | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Epidermolytic palmoplantar keratoderma of Vorner | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Congenital palmoplantar and perioral keratoderma of Olmsted | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| keratoderma met pachyonychia congenita | Associated morphology | False | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Palmoplantar hyperkeratosis sclerodactyly syndrome (disorder) | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 | 
| Papuloverrucous palmoplantar keratoderma of Jakac-Wolf | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Hereditary palmoplantar keratoderma | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 2 | 
| Palmoplantar keratoderma with leukoplakia | Associated morphology | True | Hyperkeratosis | Inferred relationship | Some | 3 |