Derm Flashcards
(40 cards)
A raised dermatosis that is of large diameter is called a ________.
plaque
a ___ is a flat, generally < 1 cm area of skin or mucous membranes with different color from surrounding tissue. . May have fine, non-palpable scale
macule
flat lesions are called _______ (< 1 cm) or _____ (> 1cm)
macules; patches
A__ is a flat, generally > 1 cm area of skin or mucous membranes with different color than surrounding tissues. . May have fine, non-palpable scale
patch
A ____ is a closed cavity or sac containing fluid or semisolid material. It can have an epithelial, endothelial, or membranous lining. It is raised and smooth.
cyst
A ____ is a dermal or subcutaneous, firm, well-defined lesion usually greater than 1.0 cm in diameter. It is raised and smooth.
nodule
4 raised and smooth lesions:
cyst, nodule, papule, plaque
A discrete, solid, elevated body usually less than 0.5cm in diameter. It is raised and smooth.
papule
A discrete, solid elevated body usually broader than it is thick, measuring more than 0.5 cm in diameter.
plaque
a hardened layer that results when serum, blood, or purulent exudate dries on the skin surface. can be thin or thick and have varying color.
crust
_____ is a type of surface change. It results from excess stratum corneum that accumulates in flakes or plates. usually has a white or gray color
scale
a fluid filled blister > 0.5cm in diameter. fluid can be clear, serous, hemmorhagic, or pus filled
bulla
3 fluid filled lesions include:
- bulla
- pustule
- vesicle
circumscribed elevation that contains pus. usually < 0.5cm in diameter
pustule
a fluid filled cavity or elevation less than 0.5cm in diameter. fluid may be clear, serous, hemorrhagic, or pus filled.
vesicle
3 red blanchable lesions:
- erythema
- erythroderma
- telangiectasia
localized, blanchable redness of the skin or mucous membranes. The color changes due to increased blood flow, not leakage of blood into the skin as purpura.
erythema
generalized, blanchable redness of the skin that may be a associated with desquamation. The color changes due to increased blood flow, not leakage of blood into the skin as purpura.
erythroderma
a visible, persistent dilation of small, superficial cutaneous blood vessels. this will blanch.
telangiectasis
3 Purpuric lesions are: 1. 2. 3. These do not blanch because blood has leaked outside of the vessels and into the surrounding skin.
- ecchymosis
- petechiae
- palpable purpura
extravasation of blood into the skin or mucous membranes. an area of flat color change may progress over time from blue-black to brown-yellow or green.
ecchymosis
Tiny 1-2mm, initially purpuric, non-blanchable macules resulting form tiny hemorrhages.
petechiae
raised, palpable discoloration of the skin or mucous membranes d/t vascular inflammation of the skin and extravasation of blood.
palpable purpura
the thinning of tissue; can be epidermal, dermal, or subcutaneous
atrophy