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100

This is the term for an SK that has become slightly swollen and developed an irregular, red flare in the surrounding skin.

What is an inflamed or irritated seborrheic keratosis?

100

The most common kind of benign acquired vascular proliferation, arising as papules most commonly found on the trunk, usually starting in the 4th decade.

What are cherry hemangiomas?

100

These lesions are 3-10mm, raised, hard, pink/brown growths most commonly found on the pretibial region of the lower legs. Their most common etiologies are a reaction to trauma, insect bite, or viral infection.

What are dermatofibromas?

100

This is a smooth, waxy, hairless, papillated growth on the scalp that presents at birth or in early childhood.

What is a nevus sebaceous?

200

This variant of SK are found on the lower legs and dorsal feet. They are 1-10 mm in size, round, and dry with a stuck-on appearance.

What are stucco keratoses? 

200

These growths are small yellow papules that may become dome shaped and umbilicated over time. They may have telangiectasias and become mistake for a BCC.

What are sebaceous hyperplasia?

200

This is an abnormally large scar but confined to wound site occurring early after injury (usually within 4 weeks) and regresses with time, does not contain collagen bundles.

What is a hypertrophic scar?

200

This is a mobile cyst of the scalp that is made of a different of keratin that an epidermal cyst. There may be a genetic predisposition.

What is a pilar cyst?

300

This sign describes the sudden appearance of SK's or a sudden increase in number and size of SK's which may be a sign of internal malignancy.

What is the Leser-Trelat Sign?

300

These are common, benign, tiny (1-3 mm) epidermal inclusion cysts made from keratin, with a characteristic porcelain-white color, and they are typically found on around the eyelids of adults.

What are milia?

300

This is an abnormally large scar but extends beyond the wound site occurring later in wound healing phase and does not usually regress, comprised of large collagen bundles.

What is a keloid?
300

This is a benign firm 2-6 mm nodule on the helix or antihelix that is often painful. It can develop a central scale and mimic SCC.

What is chondrodermatitis nodularis helicus? (CNH)

400

This is an area on the body where an SK in not capable of being present. 

What are the palms, the soles, or the lips?
400

This type of growth is a 2-3 mm brown/black papule occurring most commonly in skin types IV-VI, starting on average in the second decade of life. They have a genetic predisposition and are thought to be related to SK's.

What is dematosis papulos nigra?

400

This is the name of the sign seen when a dermatofibroma retracts as a result of compressing/elevating the lesion with the thumb and index finger.

What is the dimple sign?

400

This is the most common malignant tumor that develops in a nevus sebaceous. 

What is a BCC?

500

Smooth-surfaced, dome-shaped SK's may have these white or black pearls of keratin, that are 1 mm in diameter, and are embedded in the surface.

What are horn cysts, psuedo-horn cysts, or horn pearls?

500

This type of growth is a benign sweat duct tumor that appear as small, firm, flesh-colored papules that most commonly occurs on the lower eyelids. There is often a genetic predisposition.

What are syringomas? 

500

This is a side effect of overtreatment of keloids/hypertrophic scars with intralesional kenalog.

What is skin atrophy/telangiectasias?

500

This is the most common benign tumor that develops in a nevus sebaceous.

What is a trichoblastoma?

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