CDT Laboratory Procedures & Biopsies 3

Question 1

When labeling a biopsy specimen container, which information is MOST critical to include?

Accepted Answer

Patient name, date of birth, and biopsy site

Answer

Patient name, date of birth, and biopsy site are essential identifiers to ensure correct specimen-patient matching and accurate pathology reporting.

Question 2

Which stain is used in dermatopathology to highlight mast cells?

Accepted Answer

Toluidine blue

Answer

Toluidine blue stains mast cell granules metachromatically (purple-red), making it the preferred stain for identifying mast cells in tissue sections.

Question 3

A patient presents with a nodule on the ear. The dermatologist requests an incisional biopsy. What does this technique involve?

Accepted Answer

Removal of only a representative portion of the lesion

Answer

An incisional biopsy removes only part of a larger lesion for diagnosis when complete excision is not practical or necessary at the initial visit.

Question 4

What is the purpose of the Wood's lamp examination in a dermatology laboratory setting?

Accepted Answer

To detect UV-fluorescent organisms or pigmentation changes

Answer

Wood's lamp emits long-wave UV light (365 nm) that causes certain fungi, bacteria, and pigmentary conditions to fluoresce, aiding in diagnosis.

Question 5

Which local anesthetic is most commonly used for skin biopsy procedures?

Accepted Answer

Lidocaine 1% with or without epinephrine

Answer

Lidocaine 1% with epinephrine is the standard choice for skin biopsies because it provides rapid onset anesthesia and vasoconstriction to minimize bleeding.

(CDT) Certified Dermatology Tech Practice Test

(CDT) Certified Dermatology Tech Practice Test

CDT Laboratory Procedures & Biopsies 3