Dermatology - Seborrheic Keratosis Flashcards
Multiple, oval, slightly raised, light brown to black, sharply demarcated papules or plaques
Seborrheic keratosis
Seborrheic keratosis is rarely >___ cm in diameter
> 3 cm
Appear stuck on skin, as if they could be removed with a flick of a fingernail
Seborrheic keratosis
Cutaneous tag, papilloma colli, fibroma pendulum, cutaneous papilloma, fibroma molluscum, Templeton skin tags, skin tags
Achrochordon
Kuntil
Achrochordon
Fibrous histiocytoma
Dermatofibroma
Firm, irregularly shaped, fibrous, hyperpigmented, pink or red excrescence
Keloid
Claw like projections
Keloid
No claw like projections
Hypertrophic scar
Extensijon of the lesion beyond the confines of the original injury
Keloid
No spontaneous improvement
Keloid
Does not extend beyond the original wound
Hypertrophic scar
Low grade squamous cell carcinoma
Keratoacanthoma
Rapidly growing papule that enlarges from a 1 mm macule or papule to as large as 25 mm in 3-8 weeks
Solitary keratoacanthoma
Epidermal inclusion cyst, infundibular cyst, keratin cyst, sebaceous cyst
Epidermal cyst
Senile sebaceous hyperplasia, senile sebaceous adenoma
Sebaceous hyperplasia
Age of onset
Sebaceous hyperplasia
Usually past 40 yo
Very common neoplasms demonstrating sweat duct differentiation
Syringioma
keratoacanthoma
multiple lesion extendin gfrom the original central lesion
Coral-reef keratoacanthoma
Generalized eruptive keratoacanthomas
Grzybowski variant
Tx for grzybowski variant keratoacanthomas
Oral retinoids
Oral methotrexate
Oral cyclophosphamide
Progressive peripheral expansion and concomitant central healing, leaving atrophy
Type of keratoacanthoma
Keratoacanthoma centrifugum marginatum
One of the most common benign skin tumors
Epidermal cyst
Common site of epidermal cyst
Face
Neck
Trunk
Sites commonly affected by syringioma
Eyelids and upper cheeks
Sites rarely affected by syringioma
Rare on axilla Abdomen Forehead Penis Vulva
Syringioma occurs in 15% of adults with
Down syndrome, particularly females
Dilated sweat ducts, some have comma-like tails resembling tadpoles or pattern of a paisley tie
Syringioma
Probably represent adenomas of intradermal eccrine ducts
Syringioma
Tx syringioma
Electrodessication
Shave removal
Carbon dioxide laster tx by pinhold method or fractional thermolysis
Cryotherapy
