Skin lesion recognition Flashcards
Primary lesion (3)
1) develops as a direct result of the disease process
2) early lesion
3) has not been altered by trauma or spontaneous regression
Papule (4)
1) primary lesion
2) small solid elevation
3) up to 1 cm
4) due to infiltration of inflammatory cells and edema
Examples of a papule (2)
1) flea bites
2) superficial bacterial folliculitis
Pustule (3)
1) Primary lesion
2) small circumscribed elevation filled with purulent material
3) intraepidermal follicular or non-follicular
Examples of a pustule (3)
1) bacterial infection
2) Pemphigus foliaceus
3) follicular pustule: bacterial infection has a pore in the pustule
Plaque (3)
1) primary lesion
2) flat-topped elevation
3) formed by coalition of papules
Examples of a plaque
1) eosinophilic plaques in cats
2) calcinosis cutis
Wheal (hive) (4)
1) primary lesion
2) a sharply circumscribed, raised lesion
3) consist of edema
4) appear & disappear within minutes to hours
Examples of hives (3)
1) urticaria
2) insect bites
3) intradermal test
Macule (3)
1) Primary lesion
2) flat circumscribed skin discoloration < 1 cm in diameter
3) lacks surface elevation or depression
Types of discoloration (3)
1) loss of pigment
2) erythema
3) hyperpigmentation
Patch (2)
1) Primary lesion
2) flat circumscribed skin discoloration > 1 cm in diameter
Example of a patch (1)
1) canine atopic dermatitis
Vesicle (3)
1) primary lesion
2) sharply circumscribed elevated lesion <0.5 cm
3) contains fluid
Example of a vesicle (2)
1) viral disease
2) autoimmune disease
Bulla (3)
1) primary lesion
2) sharply circumscribed elevated lesion > 0.5 cm
3) contains fluid
Example of bulla (1)
1) autoimmune disease
Nodule (3)
1) Primary lesion
2) solid circumscribed elevated lesion > 1 cm in diameter
3) usually extends into the dermis
Example of a nodule (3)
1) neoplasia
2) deep infection
3) immunemediated
Cyst (2)
1) primary lesion
2) a nodule that contains fluid or semisolid material