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Nodule
Elevated, firm circumscribed lesion; deeper in dermis than papule 1-2 cm in diameter.
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Tumor
Elevated and solid lesion; May or may mot be clearly demarcated: deeper in dermis; > 2cm in diameter.
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Vesicle
- Elevated, circumscribed, superficial, not into dermis, filled with serous fluid < 2cm in diameter
- (E.g. varicella/chickenpox, Herpes Zoster/shingles)
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Bulla
- Vesicle > 1cm
- (E.g. Blister)
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Pustule
Elevated, superficial lesion; similar to a vesicle but filled with purulent fluid
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