Dermatopathology 3 Flashcards
Scabies
burrow lesion
especially found on hands
transmitted by direct contact
Nevocellular Nevi
neoplasm of melanocytes
brown, uniformly pigmented papules with well defined borders
Junctional Nevi
flat
eventually grow into dermis to form compound nevi
Compound Nevi
raised, dome shaped
undergone maturation
Dysplastic Nevi
changes shape
compound nevi with abnormal growth
pigmentation change across lesion, borders not defined
Sporadic Dysplastic Nevi
malignant transformation rare
Familial Dysplastic Nevi
precursors of malignant melanoma
Acanthosis Nigricans
thickened, hyperpigmented skin with velvet texture
Keratoacanthoma
single lesion with crater
from UV damage
consists of keratin
Seborrheic Keratosis
from sebaceous glands
cause no problems
Sudden development of multiple Seborrheic Keratosis lesions
sign of Leser- Trelat- underlying malignancy
Actinic Keratosis
in fair skinned older person from UV
can form cutaneous horn
Actinic Keratosis can develop into…..
squamous cell carcinoma
Risk factors for squamous cell carcinoma
sun exposure, fair complexion, carcinogens, old burns, arsenic ingestion, chronic ulcers, chewing tobacco
Squamous Cell Carcinoma
usually discovered when small and can be removed
can form cutaneous horn
