December 1, 2015 - Benign Skin Lesions Flashcards Preview

COURSE 2 > December 1, 2015 - Benign Skin Lesions > Flashcards

Flashcards in December 1, 2015 - Benign Skin Lesions Deck (16):

Seborrheic Keratosis

One of the most common tumors you will see.

Genetic pre-disposition.

Usually begin to appear in the 40's and increase with age.


Appear "waxy" or "warty"

Treatment is usually none, unless unsightly.

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Seborrheic Keratosis - Treatment

None unless unsightly.

If so, treatment is liquid nitrogen cryotherapy, electrodessication, curettage, or surgical excision.


Solar Lentigo

Found in 90% of people over 60 years old.

Incidence increases with age, but they may develop at any age.

Well-circumscribed in sun-exposed areas.


Treatment is to protect from sunlight, light cryotherapy, or intense pulse laser.

* Ensure not melanoma (ABCDE)

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Used to help diagnose melanoma.

A - asymmetry

B - borders uneven

C - colour uneven

D - diameter greater than 6mm

E - evolution


If any of these are present, you may want to biopsy.


Halo Nevus

Usually asymptomatic

Central nevus may or may not involute with time

Repigmentation takes place over months or years and does not always occur

Common in kids

If a new halo nevus in an adult, biopsy it.

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Blue Nevus

Early age of onset (8-15)

Well-defined homogenous blue-gray/blue-black color

Commonly found on head and neck, dorsal hands and feet, and presacral area



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Spitz Nevus

Red or pigmented papule or nodule, usually in kids or young adults

Looks like melanoma on histology, but doesn't behave like melanoma

Grows rapidly and may reach 1cm within 6 months, then settles down except for the colour


Treatment: requires complete excision

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Pigmented Spindle Cell Nevus of Reed

(Variant of Spitz nevus)

Small, well-circumscribed dark brown to black papule

Characteristic starburst pattern

Requires complete excision

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Congenital Nevi

Can be small, medium, or large.

Large/giant ones that are greater than 20cm have a 3-12% risk of developing into melanoma.

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Intradermal Nevi

Raised soft fleshy papules of any colour.

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Junctional Nevi

Flat well-defined macules with smoother borders and uniform colour.


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Compound Nevi

Combination of raised (intradermal) and flat (junctional) lesions.



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Nevus Spilus

"Splash of paint"

Tan patch with superimposed speckles that develop over time.

Common on trunk and extremities

Reports of melanoma developing within these lesions, therefore it is important to follow them with serial imaging.

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Atypical Nevi

Previously known as dysplastic nevi, but the association with melanoma is contraversial.

Clinically atypical doesn't translate into hisopathologically atypical often.



Very common tumor in adults

Most often affects the lower extremities

Has a positive dimple sign (when squeezed)

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