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SBJ-19 Common Cutaneous Neoplasms crc questions with correct answers
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SBJ-19 Common Cutaneous Neoplasms crc questions with correct answers
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SBJ-19 Common Cutaneous Neoplasmscrc questions with correct answers
Where are the melanocytes? - correct answer ✔✔Basal layer of the epidermis
Most common cutaneous neoplasm? - correct answer ✔✔Seborrheic keratosis
Seborrheic keratosis: clinical appearance - correct answer ✔✔Greasy, "stuck on" verrucous papule or
plaques
May be itchy
Seborrheic keratosis: what is usually spared? - correct answer ✔✔Rarely see these on the palms and
soles.
What is acanthosis? - correct answer ✔✔Diffuse epidermal hyperplasia
Implies increased thickness of the stratum spinosum.
Seborrheic keratosis: how are these histologically characterized - correct answer ✔✔Acanthosis
Varying degrees of papillomatosis
Hyperkeratosis
PSeudo-horn cyst (tiny collections of keratin)
Seborrheic keratoses - Dermatosis papulosis nigricans - correct answer ✔✔Seen in darker skinned
people. Darkly pigmented SKs of the face.
Seborrheic keratosis: subtypes - correct answer ✔✔Stucco keratosis (lower legs of older women, often
confused with warts)
Melanoacanthoma (often confused with melanoma)
Dermatosis Papulosis Nigricans (see preceding slide)
, Seborrheic Keratoses - correct answer ✔✔
Histo features of Seborrheic Dermatosis - correct answer ✔✔Red: dermis
Blue: anastamosing rete ridges
Green: pseudocyst
Yellow: melanin
Actinic Keratosis: what is it - correct answer ✔✔Precancerous lesions made up of keratinocytes resulting
from sun exposure
0.25% to 20% will develop into SCC if left untreated.
Typical treat all of these
Actinic Keratosis: clinical appearance - correct answer ✔✔Rough, slighty scaly, pink macules. Sometimes
they are better felt (sandpaper like) than seen.
Usually small (3 mm-1 cm). most are less than 6 mm.
Scaly spots, comes and goes in sun exposed areas.
Actinic Keratosis: treatment - correct answer ✔✔...
Actinic keratoses - correct answer ✔✔Hand has a hypertrophic keratosis with a very thick scale on top
Histo features of AKs - correct answer ✔✔Red: atypical, crowded keratinocytes occupy lower portions of
the epidermis
Green: parakeratosis (nucleated keratin layer)
Blue: orthokeratosis (non-nucleated keratin layer)
Yellow: Hair follicles, which are spared
Green: elastosis in the dermis, a sign of sun damage.
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