| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Harlequin ichthyosis | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Lamellar ichthyosis | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Ichthyosis congenita with biliary atresia | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Cutaneous syndrome with ichthyosis | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Ichthyosis vulgaris | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Severe ichthyoses | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Non-bullous ichthyosiform erythroderma | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Bullous ichthyosis | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Congenital non bullous ichthyosiform erythroderma | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Dominant congenital ichthyosiform erythroderma | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Lamellar ichthyosis AND trichorrhexis invaginata syndrome | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Ichthyosis linearis circumflexa | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Ichthyosis hystrix | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Limb reduction-ichthyosis syndrome | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| X-linked ichthyosis with steryl-sulfatase deficiency | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Ichthyosiform erythroderma | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Congenital ichthyosis, unspecified | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| [X]Other congenital ichthyosis | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Follicular ichthyosis | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Autosomal dominant ichthyosis | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| X-linked recessive ichthyosis | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Autosomal recessive ichthyosis | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Rud's syndrome | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Keratoderma hereditarium mutilans with ichthyosis syndrome | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Sclerosing dysplasia of bone, ichthyosis, premature ovarian failure syndrome | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Keratinopathic ichthyosis | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Ichthyosis prematurity syndrome | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| X-linked intellectual disability, hypogonadism, ichthyosis, obesity, short stature syndrome | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Skin fragility, wooly hair, palmoplantar keratoderma syndrome | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Hypotrichosis, osteolysis, periodontitis, palmoplantar keratoderma syndrome | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Erythrokeratodermia variabilis | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Congenital ichthyosis, microcephalus, tetraplegia syndrome | Is a | True | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| [X]Other congenital ichthyosis | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  | 
| Congenital ichthyosis, unspecified | Is a | False | Congenital ichthyosis of skin | Inferred relationship | Existential restriction modifier |  |