Primary Skin Lesions 2

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Nodule

Elevated, firm circumscribed lesion; deeper in dermis than papule 1-2 cm in diameter.
Tumor

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

Elevated, superficial lesion; similar to a vesicle but filled with purulent fluid