Common terms in dermatology

tinea versicolor


pigmented or erythematous flat lesion on epidermis

acne vulgaris


peaked or dome-shaped surface elevation <5mm in diameter

basal cell carcinoma


elevated dome shaped lesion >5mm in diameter

psoriasis


flattened, elevated area on epidermis >5mm in diameter

varicella (chickenpox)


fluid filled blister <5mm in diameter

bullous pemphigoid


fluid filled blister>5mm in diameter

fluid-filled blister with inflammatory cells


impetigo

urticaria


edematous, transient papule or plaque caused by inflitration of dermis by fluid

seborrheic dermatitis


excessive dead keratinocytes produced by abnormal keratiniztion

psoriasis


increased thickness of stratum corneum; scaly appearance of skin

psoriasis


persistence of nuclei in stratum corneum layer

verruca vulgaris


spire like projections from surface of skin to papillary dermis

pemphigus vulgaris

loss of cohesion between keratinocytes

red discoloration of skin. RBC in vessels. Blanching.

Small spots (<2mm) caused by hemorrhage into the skin. Non-palpable. Non-blanching.

Skin lesions (2-10mm) caused by hemorrhage into the skin.  +/- inflamation; +/- palpable. Non-blanching. Red->purple->brown/yellow.

purple skin lesions (>10mm) caused by hemorrhage into the skin (bruise). Non-palpable.

Burns, rickettsia akari.

Thick coagulated crust.

Pattern of rash for RMSF

• Rash pattern:
• Small pox
• Kawasaki's disease

Rash of neisseria meningitidis

Rash of measles (rubeola)

rash of scarlet fever (GAS-S. pyogenes).

varicella (VZV) rash pattern