| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| [M]Hairy nevus NOS | Is a | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Hair nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Benign melanocytic naevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Melanocytic nevus of face | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of lip | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of eyelid, including canthus | Associated 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 | 3 | 
| Melanocytic nevus of ear | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of external auditory canal | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of neck | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of trunk | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of skin of breast | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of perianal skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of upper limb | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Melanocytic nevus of shoulder | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of lower limb | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of hip | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Nevoid acquired lentiginosis | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Unilateral acquired lentiginosis | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Eruptive lentiginosis | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Solar lentiginosis | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Generalized essential telangiectasia | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Acantholytic dyskeratotic epidermal nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Nevus striatus symmetricus of thumbs | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Epidermal nevus syndrome | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Acrosyringeal nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Porokeratotic eccrine ostial and dermal duct nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Apocrine nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Straight hair nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Wooly hair nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 5 | 
| Unilateral lentiginosis | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Atrial myxoma with lentigines | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Reticulate acropigmentation of Kitamura | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Genital lentiginosis | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Labial lentigo | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Multiple lentigines syndrome | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Spindle cell nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 6 | 
| Congenital vascular nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Reticulate vascular nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Nevus sanguineous | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Mixed hemangioma | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Salmon patch nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Nevus of Ota | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Basal cell nevus with comedones | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Blue rubber bleb nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Verrucous hemangioma of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Junctional melanocytic nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Myerson's nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Cockade nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Compound nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Blue nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Common blue nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Cellular blue nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Giant cellular blue nevus of scalp | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Giant cellular blue nevus of scalp | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Balloon cell nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Spindle cell nevus of Reed | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Desmoplastic nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Congenital giant pigmented nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Oculocutaneous melanocytic nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Dysplastic nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Atypical mole syndrome | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Nevus of conjunctiva | 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 | 
| Non-neoplastic nevus of skin | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Lentigo maligna | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Dermal cellular nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Halo nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Centrofacial lentiginosis syndrome | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Cutis marmorata | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Mongolian spot | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Nevus anemicus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Nevus of Ito | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Angioma serpiginosum | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Ocular albinism-lentigines-deafness syndrome | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Linear sebaceous nevus sequence | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Peutz-Jeghers polyps of small bowel | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Pigmented hairy epidermal nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Pigmented hairy epidermal nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Peutz-Jeghers syndrome | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Solar lentigo | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Nevus unius lateris | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 8 | 
| Lentigo | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 4 | 
| Congenital melanocytic nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Nevus of iris | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevi of lip | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevi of eyelid, including canthus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevi of ear and external auditory canal | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevi of scalp and neck | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevi of trunk | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier |  | 
| Melanocytic nevi of upper limb, including shoulder | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevi of lower limb, including hip | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 1 | 
| Angiomatosis | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital non-neoplastic nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Acquired hemangiomatosis | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 2 | 
| Epithelioid and spindle cell nevus | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| 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 | 
| Melanocytic nevi of other and unspecified parts of face | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| Giant cellular blue nevus of scalp | Associated morphology | False | Pigmented nevus, no International Classification of Diseases for Oncology subtype | Inferred relationship | Existential restriction modifier | 3 | 
| 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 |