Nevi and Benign Growths -Pham

Question 1

What is the name for papular lesions that take on a waxy, verrucuous, “stuck on” appearance?

Answer 1

Seborrheiic keratosis

Question 2

What skin growth is associated with a dimple sign?

Answer 2

Dermatofibroma

Question 3

When should you biopsy a cutaneous horn? Why?

Answer 3

ALWAYS

there can be many possible malignancies underneath!

Question 4

Why should you never freeze or laser moles?

Answer 4

because it could become a melanoma and if you remove it, they will not know the origin

Question 5

What is a junctional nevus? Where is this found?

Answer 5

• flat or slightly elevated nevus
• tan, brown or dark colored
• nevus cells at the dermo-epidermal junction

Question 6

How does a junctional nevus differ from a compound nevus?

Answer 6

a junctional nevus has nevus cells at the dermo-epidermal junction

a compound nevus has nevus cells at the junction AND the upper dermis

Question 7

What are the characteristics of a dysplastic nevus?

Answer 7

• asymmetric
• irregular borders
• > 1 color
• > 6 mm in diameter

Question 8

What is the treatment for dysplastic nevus? Why?

Answer 8

Shave removal with clear margins

Risk for melanoma!

Question 9

What is the treatment for cellular blue nevus? Why?

Answer 9

it needs excision with clear margins

can progress to melanoma

Question 10

What age group are Spitz Nevi found? What is the treatment?

Answer 10

• children and young adults (red or pigmented papule/nodule)
• tx: excision with clear margins (considered atypical nevus)

Question 11

If a papule or nodule is found within a Nevus Sebaceous, does it need to be biopsied?

Answer 11

YES! neoplasms can arise within the nevus sebaceous (which in itself is a benign tumor of sebaceous glands)

Question 12

Should a halo nevus be found in older people?

Answer 12

NO!

If one is found, consider the possibility of it being a melanoma that has regressed

Question 13

What is the incidence of melanoma from a Giant Congenital Nevus? How many of these become melanomas in the first decade of life?

Answer 13

up to 15% (60% within the first decade of life)

Question 14

What is a Giant Congenital Nevus over the spinal column.skull or multiple satellite lesions associated with? What should be done to rule this out?

Answer 14

Neurocutaneous melanosis leading to:

• increased cranial pressure
• spinal cord compression
• Leptomeningeal Melanoma

*MRI to r/o CNS involvement

Question 15

What does a nevus spilus look like?

Answer 15

Light brown or tan background, speckled with smaller darker macules or papules