Week Three - Skin Tags, Dermatofibroma, Nevi, and Seborrheic Keratosis Flashcards
When irritated or injured, a skin tag may appear as a necrotic, crusted papule that may not be clinically distinctive and may raise concern regarding a ______
- Malignancy
*The easiest means of removal of a skin tag is by _____ using ______ and ______
- Lift-and-snip
- Scissors
- Forceps
The diagnostic test, “dimple sign,” if positive suggests a ______
- Dermatofibroma
______ _______ is usually sufficient for removal of a dermatofibroma, along with a biopsy if indicated
- Full-thickness excision
Characteristically, on compression, a ________ demonstrates a “buttonhole” sign
- Neurofibroma
Cafe-au-lait spots (light brown macules) are a cutaneous finding often seen in ______
- von Reckinghausen’s
Over time, moles tend to mature from _____ to _____ and then _____ types
- Junction
- Compound
- Dermal
Most nevi are acquired, appearing sometime after the _____ year of life and before age ____
- First
- 35
Regular brown color, surface, and border are characteristic features of a nevus that differentiate it from ______
- Melanoma
A blue nevus is similar in appearance to the more serious diagnosis of _____
- Nodular melanoma
Weeks to months after incomplete removal of a nevus, brown macular re-pigmentation may appear in the scar and a biopsy specimen taken from that lesion may confuse the pathologist with a _______
- Melanoma (pseudomelanoma)
A small percentage of small dark dots within melanocytic nevi are due to _____
- Melanoma
What are the four signs that help distinguish a normal mole from a melanoma?
- Asymmetry
- Border
- Color
- Diameter
There is a large risk of _____ in newborns with nevi covering more than 5% of the body surface
- Melanoma
Are moles that have changed in color, shape, or size; have been acquired in adulthood; bleed; or are itching worrisome?
- Yes
What are the differences between common and atypical moles?
Common Nevi
- Usually sun-exposed areas, often above the waist
- Absent at birth
- Usually less than 6mm
- Uniform color
Atypical Moles
- Appear in sun-protected areas
- Appear as normal nevi at ages 2-6, increase in number and size during puberty, new nevi appear throughout life
- Irregular border, margins fade into skin
- Color is variable within a single lesion
What are the three physical characteristics common to all seborrheic keratoses?
- Well-circumscribed border
- Stuck-on appearance
- Variable tan-brown-black color
