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Skin Cancer Screening & Education Flashcards

7 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Skin Cancer Screening & Education flashcards as text

  1. Bowen's disease is classified as which type of skin malignancy?

    Answer: Squamous cell carcinoma in situ

    Bowen's disease is squamous cell carcinoma in situ, meaning the malignant cells are confined to the epidermis without dermal invasion.

  2. A patient asks why a dark streak under their nail needs evaluation. You explain that subungual melanoma:

    Answer: Can mimic benign longitudinal melanonychia and may be missed without biopsy

    Subungual melanoma can appear identical to benign melanonychia, making clinical evaluation and, when indicated, nail matrix biopsy essential for diagnosis.

  3. The EFG (elevated, firm, growing) rule was developed to improve detection of which melanoma subtype?

    Answer: Nodular melanoma

    EFG (elevated, firm, growing) was introduced to help identify nodular melanoma, which may not fulfill classic ABCDE criteria due to its rapid vertical growth.

  4. Which population has the highest incidence of acral lentiginous melanoma (ALM) relative to other melanoma subtypes?

    Answer: Individuals with darker skin phototypes (types V and VI)

    While rare overall, ALM accounts for a disproportionately higher percentage of melanomas diagnosed in individuals with darker skin phototypes.

  5. When a patient asks about the difference between UVA and UVB radiation regarding skin cancer risk, the most accurate response is:

    Answer: UVB primarily causes sunburn and direct DNA damage; UVA penetrates deeper and contributes to photoaging and cancer

    UVB causes direct DNA damage and sunburn while UVA, which penetrates deeper into the dermis, contributes to photoaging and also to carcinogenesis.

  6. A patient with xeroderma pigmentosum (XP) is at extreme risk for skin cancer because this condition impairs:

    Answer: Nucleotide excision repair of UV-induced DNA damage

    XP is caused by defects in nucleotide excision repair genes, leaving UV-induced DNA photoproducts unrepaired and leading to very early and multiple skin cancers.

  7. When educating a patient about protective clothing for photoprotection, which UPF rating is considered 'excellent' protection?

    Answer: UPF 50+

    A UPF of 50+ is rated 'excellent' and blocks at least 98% of UV radiation from passing through the fabric.