Melanocytic Lesions Pt 1 Flashcards
Ephelis (ephelides) is the dermatologic term for __________.
Freckles
T/F: Ephelides identify skin type that may be more susceptible to UV damage.
True
What is the scientific term for “age spots” or “liver spots” that are a hallmark of UV damaged skin?
Actinic lentigo (lentigines)
T/F: Actinic lentigines become more pronounced with sun exposure.
False
Unlike epheledis, actinic lentigines remain constant
T/F: Melanotic macules grow slowly.
False
Maximum dimension achieved rapidly, then remains constant
What is the most common area for a melanotic macule?
Lower lip vermillion zone
Where will increased melanin pigmentation be seen in the epithelium?
Along the basal layer
T/F: Stratified squamous epithelium will appear normal in melanocytic lesions.
True
T/F: Acquired melanocytic nevus can be flat or raised.
True
Macule or papule
T/F: Nevi will have hair.
True
What are the most common locations for nevi within the oral cavity?
Hard palate or attached gingiva
What are the various stages of acquired melanocytic nevi?
1 - junctional - only in epithelium
2 - compound - in epithelium and connective tissue
3 - intradermal - in connective tissue only
What is the critical measurement for a nevus?
Less than 6mm
T/F: Intraoral melanocytic nevi do not need biopsied.
False
Excisional biopsy of all unexplained pigmented oral lesions generally is advised
T/F: Congenital melanocytic nevi are typically larger than acquired.
True
T/F: Large congenital melanocytic nevi (>20cm) have a greater chance of malignant transformation than a small congenital nevus (< 1.5cm).
True
What is the most common oral site for a blue nevus?
Palate
What is the Tyndall effect?
Microscopic effect indicating a blue nevus
Melanoma represents _____ of all skin cancers.
5%
What percentage of deaths due to skin cancer are due to melanoma?
75%
T/F: Acute and chronic sun exposure produce equal risk for melanoma.
False
Acute skin exposure presents the most risk
T/F: The more nevi a patient has, the higher their risk for melanoma.
True
