SG 1: Benign Skin Lesions Flashcards
a pigmented and stuck-on lesion is most likely
- Seborrheic keratosis
Seborrheic keratosis is common after what age
- age 30
Seborrheic keratosis arises on all body surfaces except
- palms and soles of foot
Do Seborrheic keratosis individual lesions go away?
- no
Seborrheic keratosis versus nevi and when they appear
- nevi appear in first 3 decades of life
a new nevus at age 50 should raise suspicion of
- melanoma
treatment of SKs when bothersome
- generally nothing - curetted, frozen, electrodessicated
when the SK is excoriated, what do you see?
- a pink base
what are dermatosis papulosa nigra
- tiny SKs
why do we use caution with freezing SKs on dark skin
- can cause dyspigmentation
what are stucco keratosis in what population
- small SKs located on the dorsal feet and ankles - older fair-skinned individuals
what are acrochordons
- skin tags
what is a fleshy papules arising in the axillae, neck, groin, and eyelid often pedunculated
- skin tag
factors for getting skin tags
- genetics - obesity - friction
skin tags can also be a marker for
- insulin resistance
treatment for skin tags
- elective removal - snipping - liquid nitrogen - electrodessication - may also fall off on their own
what is a red mole generally
- cherry angioma
at what age do cherry angiomas start to form
- age 30
cherry angioma highest concentration where
- the trunk
cherry angioma do they go away? are they harmful?
- do not go away - are harmless
when cherry angiomas are traumatized and bleed or thrombose they may mimic _______
- melanoma
new growths on the leg that are often nicked by shaving. are firm and feel like scar tissue with rim of pigmentation
- dermatofibroma
dermatofibromas are common where on the body
- the leg
dermatofibroma may be induced by ________
- trauma
what benign spindle cell dermal proliferation looks like a wad of scar tissue under the microscope
- dermatofibroma
what is the dimple sign of dermatofibroma
- pinch on either side of dermatofibroma and it will “dimple down”
what are solar lentigines are they cancerous or precancerous
- sun spots or age spots - no
solar lentigines reflect a history of _____ and can identify patients at risk for
- UV exposure - skin cancer
treatment for solar lentigines
- no treatment required - cosmetic treatments for those who want it
first step for solar lentigines
- sun protection
numerous skin-colored or slightly yellow umbilicate papules can be diagnosed as
- sebaceous hyperplasia
sebaceous hyperplasia are yellow due to
- sebaceous gland overgrowth
sebaceous hyperplasia umbilication due to
- growth around central hair follicle
sebaceous hyperplasia - do you have to remove
- not medically required - just cosmetic
how to distinguish sebaceous hyperplasia versus basal cell carcinoma
- seborrheic hyperplasia - yellow, umbilication, multiple papules - BCC - solitary, friable, pearly translucent with telangiectasia
an itchy lesion that will arise after trauma can be
- keloid
what is an overgrowth of scar tissue beyond the original scar site
- keloid
keloid most common in what race
- african american
keloid most common on what part of the body
- upper trunk - earlobes
treatment of keloid
- intralesional steroid injection
do we excise keloids? why?
- no - keloid may recur and larger
what is a mobile subcutaneous nodule often with overlying punctum that may discharge foul smelling cheese white material
- epidermal inclusion cyst
epidermal inclusion cysts arise from
- hair follicles
treatment of epidermal inclusion cyst
- incision and drainage
epidermal inclusion cyst versus bacterial abscess
- epidermal inclusion cysts do not require oral antibiotics upon rupture - they are sterile
what is a tiny epidermoid cyst that often occurs in the face
- milia
milia in newborn versus milia in adult
- go away in newborns - persist in adults
what are firm, mobile subcutaneous nodules that lack punctum that may enlarge over months to years and do not discharge any material
- pilar cyst
pilar cyst compared to epidermal inclusion cyst
- pilar cyst less likely to rupture or get inflammed
location of pilar cyst
- nearly always on the scalp
treatment of pilar cyst
- elective excision
diagnosis of mobile, soft, subcutaneous nodule that lacks any overlying skin change
- lipoma
treatment of lipoma
- elective surgery
what are lipomas
- collection of fat under the skin
genetics of lipomas
- autosomal dominant
lipomas begin at what age
- early adulthood
