Chapter 16 Pathology

Acne

Acne

chronic papular and pastular eruption of the skin with increased production of sebum

Alopecia

absence of hair from areas where it normally grows

Basal Cell Carcinoma

malignant tumor of the basal cell layer of the epidermis

Burns

injury to tissues caused by heat contact

Cellulitis

diffuse, acute infection of the skin marked by local heat, redness, pain, and swelling

Crust

collection of dried serum and cellular debris

Cyst

thick-walled, closed sac or pouch containing fluid or semisolid material

Ecchymosis

bluish-purplish mark on the skin

Eczema

inflammatory skin disease with erythematous, papulorvesicular lesions

Erosion

wearing away or loss epidermis

Exanthematous Viral Disease

rash of the skin due to viral infection

Fissure

groove or cracked-like sore

Impetigo

bacterial inflammatory skin disease characterized by vesicles, pustules, and crusted-over lesions

Urticaria

acute allergic reaction in which red, round wheals appear on the skin; hives

Macule

flat lesion measuring less than 1 cm in diameter

Melanoma

a tumor of melanin forming cells

Nodule

solid, round or oval elevated lesion 1 cm or more in diameter

Papule

small, solid elevation of the skin (<1 cm)

Petechial

small, pinpoint hemorrhage

Polyp

growth extending from the surface of mucous membrane

Pruritus

itching

Psoriasis

chronic, recurrent dermatosis marked by itchy, scaly, red plaques covered by silvery gray scales

Pustule

papule containing pus

Scabies

contagious, parasitic infection of the skin with intense pruritus

Scleroderma

chronic progressive disease of the skin and internal organs with hardening and shrinking of connective tissue

Squamous Cell Carcinoma

malignant tumor of the squamous epithelial cell of the epidermis

Systemic lupus erythematosus

chronic inflammatory disease of collagen in skin, joints, and internal organs

Tinea

infection of the skin caused by fungus

Ulcer

open sore on the skin or mucous membranes

Vesicle

small collection of clear fluid

Vitiligo

loss of pigment in areas of the skin

Wheal

smooth, swollen papule or plaque that is redder or paler than surrounding skin