Orgarnoid nevushttps://en.wikipedia.org/wiki/Nevus_sebaceous
Orgarnoid nevus is a congenital, hairless thick lesion that typically occurs on the face or scalp. Such nevi are classified as epidermal nevi and can be present at birth, or early childhood.

Basal cell carcinoma can arise in sebaceous nevi, usually in adulthood. However, the rate of such malignancies is now known to be less than had been estimated. For this reason, prophylactic excision is no longer recommended.

  • At birth, it is observed as alopecia with a yellow patch. With age, the lesion gradually thickens.
  • It mainly occurs on the scalp, but can also occur on the face.