| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Excision of congenital pigmented nevus of head or neck | Direct morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of scalp | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Acantholytic dyskeratotic epidermal nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 6 | 
| Nevus striatus symmetricus of thumbs | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 6 | 
| Pigmented hairy epidermal nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Giant cellular blue nevus of scalp | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Melanocytoma of optic nerve head | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytoma of meninges | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytoma of meninges | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nevus of cornea | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nevus of choroid | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nevus of iris | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Benign nevus of sole of foot | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytoma of optic nerve head | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Excision of congenital pigmented nevus of head or neck | Direct morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nevus of oral mucosa | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nevus of left iris | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nevus of right iris | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nevus of bilateral iris | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Nevus of bilateral iris | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Hair nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Straight hair nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Wooly hair nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of lymph node | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of skin of external genitalia | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital pigmented melanocytic nevus of skin of right ear | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital pigmented melanocytic nevus of skin of left ear | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital pigmented melanocytic nevus of skin of lip | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| [M]Hairy naevus NOS | Is a | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  |