Derm Flashcards
keratoacanthoma is difficult to distinguish from what other skin finding?
squamous cell carcinoma
lesions suspicious for keratoacanthoma should be treated in what way?
excised with 5mm margin
what topical therapy option is effective in children with pyogenic granuloma?
topical beta blocker
a sudden increase in the number of seborrhic keratoses should increase suspicion for what?
underlying malignancy
an adult patient presents with dome shaped, asymptomatic yellow papules with central umbilication on the forehead and cheeks. what is the diagnosis?
sebaceous hyperplasia
sebaceous hyperplasia lesions that appear suspect should be shave biopsied to rule out what other etiology which can appear similar?
basal cell carcinoma
what benign skin lesion is characterized by vascularity surrounded by scaly brown or white collar?
pyogenic granuloma
what benign skin lesion is caused by dermal proliferation of fibroblasts and typically presents as firm, solitary, hyperpigmented, 3-10mm nodule?
dermatofibroma
what is the Fitzpatrick or dimple sign?
applying lateral pressure to a skin lesion will cause dimpling or retraction beneath the skin
t/f no treatment is required for a routine dermatofibroma
true
what are the two main ddx to consider when evaluating SK?
dermatosis papulosa nigra and melanoma
t/f cherry angioma can be treated successfully with cryotherapy
true
how are rapidly growing pilar cysts treated?
complete excision
what are the most common type of cutaneous cyst?
epidermal inclusion cyst
what is the typical treatment for inflammed epidermoid cyst?
intralesional injection followed by interval excision
what type of benign skin cyst has the potential for intracranial extension?
dermoid cyst
what depth measurement is used to assess melanoma?
Breslow depth
the USPSTF recommends UV exposure cousneling for patients with fair skin types of what ages?
6 months to 24 years
all skin lesions suspicious of melanoma should have what margins circumferentially when performing an excisional biopsy?
1 to 3 mm margins
what is the Breslow depth of a lesion suspicious of melanoma?
maximal depth / thickness of the primary lesion
melanoma in situ is confined to what skin layer?
epidermal layer
what is the most common melanoma type in people with fair skin?
superficial spreading
what type of melanoma appears on palms / soles?
acral lentiginous
what type of melanoma is usually > 1cm when diagnosed, more common in those > 65 yo, and consists of macule that grows into a patch?
lentigo maligna
melanoma lesions greater than what diameter should be referred to surgery for wide local excision and discussion of sentinel lymph node biopsy?
> 0.8mm
in addition to surgical excision and possible sentinel lymph node biopsy, what is the other hallmark of treatment for advanced melanoma?
adjuvant therapy
t/f multiple dermatofibromas may be associated with underlying SLE or immunodeficiency
true
t/f dermoscopy can differentiate keratoacanthoma from SCC
false
a 68 yo M presents with three dome shaped small red purple, soft, compressible papules on his trunk. what is the most likely diagnosis?
cherry angioma
T/F black hairy tongue, median rhomboid glossitis and geographic tongue are benign conditions
true
t/f erythroplakia may progress to oral cancer
true
which condition is characterized by white adherent plaque of the tongue that cannot be scraped off that has malignant potential?
leukoplakia
what condition is characterized by formation of disorganized extracellular matrix due to excessive fibroproliferative collagen response?
keloid
what injectable is more effective than corticosteroid for treatment of keloid and hypertrophic scar?
botox
what is the key difference between keloid and hypertrophic scar?
keloid extends beyond the margins of the initial injury
t/f keloids are likely to happen later after skin insult and progress over time whereas hypertrophic scars develop more quickly and regress over time
true
t/f keloid and hypertrophic scar are caused by chronic inflammation at the reticular dermis
true
for keloid revision, injection of CSI should be considered at what time point in relationship to the procedure?
inject 10-14 days after the procedure
which form of cryotherapy is superior for treatment of keloid / hypertrophic scar?
intralesional injected liquid nitrogen
how often should triamcinolone be injected for treatment of keloid?
monthly
how often should liquid nitrogen be injected for treatment of keloid?
every 2-3 weeks
which chemotherapeutic agent can be injected with corticosteroids to increase effectiveness of treatment for keloid ?
fluorouracil
t/f combining surgical excision with topical or intralesional therapies improves cosmetic outcomes and reduces recurrence of hypertrophic scar
true
what physical treatment modality is recommended first line for hypertrophic scars alone or combined with topical / intralesional options?
laser therapy
what topical product should be used after a procedure in someone with known history of keloid?
gel sheet over incision
t/f botox has been found to be more effective than CSI or fluorouracil injections for treatment of keloid
tru
