| Primary Lesions | RAISED LESIONS | FLAT LESIONS | FLUID FILLED (RAISED) |
| Macule | | Flat, circumscribed, discolored, <1cm
For example: freckles, flat nevi, petechia | |
| PATCH | | flat, irregular, >1cm (vitiligo) | |
|
PAPULE | SOLID, ELEVATED, CIRCUMSCRIBED <1CM
E.G.RAISED NEVUS, WART [VERRUCA]
HINH NGON TAY | | |
| PLAQUES | COALESCED (GROUPING TOGETHER) PAPULES, >1CM (PSORIASIS) | | |
| NODULE | SOLID, ELEVATED, 1-2CM (LIPOMA = FATTY GROWTH) | | |
| TUMOR | LARGER THAN A FEW CENTIMETERS, FIRM OR SOFT (LIPOMA - FAT TUMOR) DOESNT MEAN CANCER, TUMOR CAN BE BENIGN OR MAGLINANT | | |
| WHEAL | SUPERFICIAL, RAISED, ERYTHEMATOUS, IRREGULAR (ALLERGIC REASTION, PPD, MOSQUITO BITE) - CAUSES INTERSTITIAL EDEMA <1CM | | |
| URTICARIA (HIVES) | WHEALS COALESCE TO FORM EXTENSIVE REACTION; INTENSELY PRURITIC, >1CM | | |
| VESICLE | | | ELEVATED CAVITY WITH CLEAR LIQUID, <1CM (HERPES CIMPLEX, VARICELLA [CHICKEN POX], HERPES ZOSTER [SHINGLES], CONTACT DERMATITIS [E.G., POISON IVY] .. MUN COC NHO |
| BULLA | | | ELEVATED CAVITY WITH FLUID, >1CM (CLISTER, BURNS).... MUN COC BU |
| PUSTULE | | | CONTAINS PUS, FILLED WITH LEUKOCYTES, NOT NECESSARILY INFECTED (ACNE) ... CREAMY |
| CYST | | | ENCAPSULATED FLUID FILLED CAVITY IN DERMIS OR SUB-Q (SEBACEOUS CYST) IF DEEP, MAY BE HARD TO DIFFERENTIATE FROM A NODULE OR TUMOR (E.G. BREAST CYST VERSUS TUMOR) |
