n251 skin lesions

Macules

Just a color change of the skin <1 cm

Papules

Elevated, solid thickening of the epidermis <1 cm

Paches

Macules that are >1 cm

Plaques

Papules coalescing to form surface elevation wider tan 1 cm 

Nodules

Solid, elevated, hard or soft, greater than 1 cm that may extend deeper into dermis than papule 

Wheals

Superficial, raised, transient and erythematous, irregular in shape due to edema

Tumors

Large in diameter, firm or soft, deeper into dermis, may be cancerous

Urticaria (Hives)

Wheals coalesce to form extensive pruritic reactions

Vesicles

Elevated cavity containing fluid up to 1 cm

Cysts

Encapsulated fluid filled cavity

Bullas

Larger than 1 cm, usually single chamber, superficial in dermis, ruptures easily

Pustules

Pus in cavity that is circumscribed and elevated

crust

Thickened dried out exudate

Scale

Compact flakes of desiccated skin from shedding of dead excess keratin cells

Fissures

Linear crack with abrupt edges extending into the dermis

Erosions

Scooped out but shallow depression

Ulcers

Deeper depression extending into dermis with irregular shape, may bleed, leaves scar

Excorications

Self inflicted abrasion that is superficial

Lichenifications

Prolonged intense scratching leads to thickened skin producing tightly packed set of papules

Keloids

Benign excess of scar tissue beyond original injury