Orgarnoid nevus
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.
References Nevus Sebaceus 29494100 
Nevus sebaceus of Jadassohn also referred to as organoid nevus, is a congenital malformation involving hamartomas of the pilosebaceous follicular unit. These growths most commonly form on the scalp, but may also appear on the forehead, face, or neck. They undergo a growth phase during puberty due to hormonal changes. In adulthood, the growths may develop secondary neoplasms within them, most commonly trichoblastoma. The treatment of these lesions is controversial, with options ranging from observation to early excision in childhood.
 Effective Treatment of Congenital Melanocytic Nevus and Nevus Sebaceous Using the Pinhole Method with the Erbium-Doped Yttrium Aluminium Garnet Laser 25324667 
Congenital melanocytic nevus (CMN) is a melanocytic nevus that is either present at birth or appears during the latter stages of infancy. Nevus sebaceous has been described as the hamartomatous locus of an embryologically defective pilosebaceous unit. Here, we describe how we used the pinhole technique with an erbium-doped yttrium aluminium garnet (erbium : YAG) laser to treat nevi lesions in different patients.