benign skin lesions

Question 0

compound nevi

Answer 0

when a juxal nevus extends into superficial dermis with bridges (papillomatous surface)

Question 1

junctional nevi

Answer 1

epidermis only; flat macular lesion (at jx)

nests along the basal layer

Question 2

intradermal

Answer 2

when a compoudn nevus loses its junctional component

in the dermis

Question 3

dysplastic

Answer 3

can arise sporadically, but unclear if they progress to melanoma

Question 4

seborrheic keratosis can appear on all surfaces except

Answer 4

palms and soles

Question 5

age of onset of seb keratosis vs nevi

Answer 5

seb keratosis typically appear after age 30 where nevi appear before age 30 (if appear after should think melanoma)

Question 6

acrochordons

Answer 6

skin tags! fleshy papules arise in axillae, neck, groin, and eyelids esp on neck, upper chest and upper back

Question 7

etio of acrochordons

Answer 7

genetics
obestiy
friction
can be a marker for insulin resistance

Question 8

tx for acrochordons

Answer 8

elective, snipping or liquid nitrogen

sometimes just necrose and fall off

Question 9

cherry angiomas

Answer 9

people can get them starting at age 30 and are likely to get more once they are gone
trunk
harmless

Question 10

dermatofibroma

Answer 10

benign spindle cell dermal proliferation that appears and has a scar-like texture; rim gets darker with time

legs of women

Question 11

dimple sign

Answer 11

dermatofibroma

pinching either side of the DF will make it dimple down because of its scarlike tethering of surrounding dermis

Question 12

solar lentigo

Answer 12

brown macule common seen in edlerly secondary to sun damage, but not cancerous or precancerous

Question 13

etio of solar lentigo

Answer 13

increase in melanocytes

Question 14

sebaceous hyperplasia

Answer 14

skin or yellow-colored smooth papules that may be umbilicated on forehead and central face

sebaceous gland- hence the yellow color–umbillication due to gland growth around a central hair follicle
*removal not neceassry

Question 15

how to differntiate sebaceous hyperplasia from BCC

Answer 15

both can look like skin colored papules but BCC tends to be more solitary and friable (bleeds etc)transculence, telangeictasia

Question 16

milia

Answer 16

tiny epidermoid cyst on face

can be easily extracted without scrring

Question 17

epidermal inclusion cyst

Answer 17

mobile subcutaneous nodule often with overlying punctum–usually evolve frm hair follciles–theyre collections of debris within a sack that may have smelly cheesy material

need to be surically removed, but dont need to be –are sterille

Question 18

pilar cysts

Answer 18

firm, mobile subcutaneous nodules lacking punctum–nearly alwys on the scalp
no discharge
tx surgery

Question 19

lipoma

Answer 19

collection of fat under skin that grows to a few centimeters than stops
soft, mobile, sometimes tender