Workup
Histologic Findings
The epidermis shows papillomatous hyperplasia. In the dermis, the numbers of mature sebaceous glands are increased. Ectopic apocrine glands are often found in the deep dermis beneath sebaceous glands.
Frequently, small hair follicles and buds of basaloid cells that may represent malformed hair germs are present.
In childhood, the sebaceous glands in nevus sebaceus are underdeveloped, and the histologic findings may consist of only immature hair structures.
Note the images below:
Mild papillomatosis of the epidermis with sebaceus gland lobules opening directly onto the epidermis.
Next:
Staging
In the early stage, the sebaceous glands and hair follicles are hypoplastic. In the second stage, at puberty, hyperkeratosis and papillomatosis with numerous and hyperplastic sebaceous glands (diagnostic) are present.
Previous
Media Gallery
-
Nevus sebaceus in a 4-month-old baby manifesting as nodular plaque.
-
Brownish wartlike plaque in a 25-year-old patient.
-
Nevus sebaceus manifesting as a bald patch in a child.
-
Nevus sebaceus manifesting as an orange-yellow plaque with a smooth or somewhat velvety surface in a 6-month-old baby.
-
Nevus sebaceus manifesting as a small plaque beside a scaly scalp in a 13-year-old boy.
-
Linear type of nevus sebaceus.
-
Mild papillomatosis of the epidermis with sebaceus gland lobules opening directly onto the epidermis.
-
Mild papillomatosis at high power.
-
Verrucous plaque in a 19-year-old woman.
-
Verrucous plaque in a 12-year-old-girl.
of
10
