Practice Test Geeks(CDT) Certified Dermatology Tech Practice Test
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Dermatological Assessment Methods 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.

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  1. When using dermoscopy to evaluate a pigmented lesion, which feature is most associated with melanoma?

    Answer: Atypical pigment network with regression structures

    Atypical pigment network combined with regression structures (white scar-like areas or blue-gray peppering) is a key dermoscopic indicator of melanoma.

  2. A patient presents with a rash that blanches completely with diascopy. This finding most likely indicates:

    Answer: Erythema caused by vascular dilation

    Blanching on diascopy indicates that redness is caused by blood in dilated vessels, not extravasated blood, which is consistent with inflammatory erythema.

  3. The Nikolsky sign is performed by applying lateral shear pressure to skin. A positive result suggests:

    Answer: Epidermal–dermal adhesion defect

    A positive Nikolsky sign, where skin slides off with gentle pressure, indicates a defect in epidermal cohesion, as seen in pemphigus vulgaris and staphylococcal scalded skin syndrome.

  4. Which Wood's lamp finding is characteristic of erythrasma caused by Corynebacterium minutissimum?

    Answer: Coral-red fluorescence

    Erythrasma fluoresces coral-red under Wood's lamp due to porphyrins produced by Corynebacterium minutissimum.

  5. When assessing skin turgor in a patient, which site provides the most reliable assessment in elderly patients?

    Answer: Forehead or chest

    In elderly patients, the forehead or chest are preferred sites for turgor assessment because age-related loss of elasticity on the hands makes hand turgor unreliable.

  6. A dermatology tech documents a lesion as 'annular.' This term means the lesion is:

    Answer: Ring-shaped with central clearing

    Annular describes ring-shaped lesions with central clearing, commonly seen in conditions like tinea corporis and erythema migrans.

  7. The ABCDE criteria for melanoma assessment include 'E' which stands for:

    Answer: Evolution

    The 'E' in the ABCDE melanoma screening criteria stands for Evolution, referring to any change in size, shape, color, or new symptoms over time.