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Primary Skin Lesions
| Term | Definition |
|---|---|
| Macule | a small, flat spot that goes up to 1 cm in diameter |
| Wheal | an irregular, relatively transient area of skin edema |
| Vesicle | a blister filled with serous fluid that goes up to 1 cm in diameter |
| Papule | a raised area that is less than 1 cm in diameter |
| Nodule | a marble-like lesion under the skin that is greater than 0.5 cm |
| Pustule | filled with pus |
| Bulla | a fluid-filled lesion that is greater than 1 cm in diameter |