Texas Class A Barber Written ExamSanitation, Disinfection, and SafetyHard
A barber is performing a shave and notices a client has a raised, fluid-filled lesion that is larger than a blister (over 0.5 cm in diameter) and contains clear fluid. What type of primary skin lesion is this?
- ACyst
- BPustule
- CBulla
- DVesicle
Show answer & explanationAnswer & explanation
Correct answer: C. Bulla
A bulla is defined as a large blister containing watery fluid, typically greater than 0.5 cm in diameter. The description 'raised, fluid-filled lesion that is larger than a blister (over 0.5 cm)' perfectly matches this definition.
Why the other options are wrong
- A. A cyst is a closed sac in the tissue, often containing fluid or semi-solid material, but typically deeper and more encapsulated than a bulla.
- B. A pustule is an elevated lesion containing pus, not clear fluid.
- D. A vesicle is a small, clear fluid-filled blister, typically less than 0.5 cm in diameter.
Bulla
A primary skin lesion characterized as a large blister containing watery fluid, typically greater than 0.5 cm in diameter.
- Large, fluid-filled blister
- Contains clear fluid
- Greater than 0.5 cm in diameter
Memory trick: Big Bubble = Bulla, Small Bubble = Vesicle