Dermatologic nomenclature
Primary lesions
Small lesions (<0.5cm)
| Name | Raised/Palpable | Fluid-Filled | Other Description | Diagram |
| Macule | No | None | flat, cirumscribed, colored |  |
| Papule | Yes | None | Solid |  |
| Vesicle | Yes | Clear | .png.webp) | |
| Pustule | Yes | Pus | Leukocytes or keratin |  |
Large lesions (>0.5cm)
| Name | Raised/Palpable | Fluid-Filled | Other Description | Diagram |
| Patch | No | None | Large macule (flat, colored) |  |
| Plaque | Yes | None | Superficially raised, circumscribed solid area |  |
| Nodule | Yes | None | Distinct large papule |  |
| Bulla | Yes | Clear | Large vesicle/blister or exposed epidermal layer |  |
| Wheal | Yes | Edema | Firm and edema of dermis |
Other
Ulcer, fissue, and erosion
- Plaque/scaley papule
- Eschar
- Fissure/erosion/ulcer
- Purpura/petechia
- Plaque/smooth papule
Secondary lesions
Section One
- Scales – dead epidermal cells (dry white dandruff)
- Cursts – dead epidermal cells + serum (oily secretions)/pus
- Erosion –focal effacement of epidermis
- Ulcer – focal effacement of epidermis +dermis
- Fissure – linear crack into epidermis +dermis
- Atrophy – thinning of epidermis +dermis
- Scar – healed skin with connective and epithelialized granulation tissue
- Lichenification – thickened epidermis
- Petechia – non-blanching, micro- hemorrhages (3mm) into the dermis
- Purpura - non-blanching, small hemorrhage (0.5-1cm) into dermis
- Ecchymoses – large area of hemorrhage into dermis (a.k.a bruising)
See Also
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