What is the term for a large blister?

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Multiple Choice

What is the term for a large blister?

Explanation:
In dermatology, a large blister is called a bulla. A bulla is a fluid-filled lesion bigger than about 1 cm. It differs from a vesicle, which is a smaller blister under 1 cm, and from a pustule, which contains pus. Bullae form when fluid collects between layers of the skin, and they can arise from friction, burns, or autoimmune conditions such as bullous pemphigoid. The other terms relate to different concepts: dementia is a cognitive disorder, the coronal plane is an anatomical reference dividing the body into front and back, and catatonia is a motor-psychomotor syndrome.

In dermatology, a large blister is called a bulla. A bulla is a fluid-filled lesion bigger than about 1 cm. It differs from a vesicle, which is a smaller blister under 1 cm, and from a pustule, which contains pus. Bullae form when fluid collects between layers of the skin, and they can arise from friction, burns, or autoimmune conditions such as bullous pemphigoid. The other terms relate to different concepts: dementia is a cognitive disorder, the coronal plane is an anatomical reference dividing the body into front and back, and catatonia is a motor-psychomotor syndrome.

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