Differential Diagnosis Flashcards
What is a macule? A patch ?
macule- Circumscribed change in color without elevation or depression less than 1 cm
Patch- Flat change in color greater than 1 cm
What is a papule? Plaque?
Papule- Elevated area of skin less than 1 cm
Plaque- Elevated area greater than 1 cm
What is a nodule?
Deep seated mass in the deep dermis or subcutaneous greater than 1 cm
What is a tumor?
Raised collection of cells greater than 1 cm
What is a wheal?
Elevation of the skin with fluid
What is a vesicle? Bulla?
Vesicle- thin walled elevated lesion containing fluid less than 1 cm. Can be superficial or deep into epidermis
Bulla- vesicle greater than 1 cm
What is a pustule?
Vesicle containing WBCs which gives a white or yellow fluid
What is scale?
Epidermal cells that are peeling off in groups
What is crust?
Dry/moist material on the skin surface that may include serum, blood, wbcs
What is a fissure?
Deep linear split in the skin extending through the epidermis into the dermis
What is erosion?
Depressed area that reflects a partial or full thickness loss of epidermis
What is ulcer?
Focal loss of epidermis and dermis
What is comedo?
Plug of sebaceous and keratinous material lodged in the opening of a hair follicle
What is lichenification?
Area of thickened epidermis induced by scratching, skin lines are accentuated so the surface looks like a washboard
What is petechiae?purpura?
Petechiae- Deposit of blood less than 0.5 cm
Purpura- Deposit of blood greater than 0.5 cm
