- Aplasia cutis congenita.
- Nevus sebaceus of Jadassohn.
- Epidermal nevus.
- Schimmelpenning-Feuerstein-Mims syndrome.
- Pringle-Bourneville syndrome (tuberous sclerosis).
- Neurofibromatosis type 1 (von Recklinghausen).
- Incontinentia pigmenti.
- Congenital melanocytic nevus.
- Neurocutaneous melanosis.
- Xeroderma pigmentosum.
- Cockayne syndrome.
- Ehlers-Danlos syndrome.
- Klippel-Trenaunay-Weber syndrome.
- Proteus syndrome.
- Sjögren-Larsson syndrome.
- Sturge-Weber syndrome.
- Blue rubber bleb nevus syndrome.
- Incontinentia pigmenti achromians (hypomelanosis of Ito).
