RASH Flashcards
– flat lesion ,usually a circumscribed change of colour
Macule
a broad papule, or confluence of papules, plateau-like lesion that is greater in its diameter than in its depth.
Patch
– small , solid, elevated lesion
Papule
– a lesion slightly raised over a larger area
Plaque
– a large , solid , palpable and elevated lesion
Nodule –
– an elevated lesion ,fluid filled
Blister
– depressed lesion with loss of surface epithelium
Ulcer
– non raised red-brown non blanchable lesions
Petechiae
a circumscribed, fluid-containing, epidermal elevation generally considered less than either 5 or 10mm in diameter at the widest point
Vesicles-
-a rounded or irregularly shaped blister containing serous or seropurulent fluid, equal to or greater than either 5 or 10mm
Bulla
are flat-topped, palpable lesions of variable size, duration, and configuration that represent dermal collections of edema fluid.
Wheals
-consist of compressed layers of stratum corneum cells that are retained on the skin surface
Scale
____ involve focal loss of the epidermis, and they heal without scarring.
Erosions
_______ extend into the dermis and tend to heal with scarring.
Ulcers
______consist of matted, retained accumulations of blood, serum, pus, and epithelial debris on the surface of a weeping lesion.
Crust
____________is a thickening of skin with accentuation of normal skin lines that is caused by chronic irritation (rubbing, scratching) or inflammation
Lichenification
_________ -Ulcerated lesions inflicted by scratching are often linear or angular in configuration
Excoriation
___ - dermal thickening causing the cutaneous surface to feel thicker and firmer.
Induration
__________ - refers to a loss of tissue, and can be epidermal, dermal, or subcutaneous. With epidermal atrophy, the skin appears thin, translucent, and wrinkled.
Atrophy
___________ - softening and turning white of the skin due to being consistently wet.
Maceration
_______ is a flat lesion; it is not elevated and it is not depressed ,it is a different color than the surrounding normal skin.
White, brown, and red are the most common color changes
appear in many shapes.
macule
When a macule is larger than 5mm in diameter, it is called
a patch.
A freckle is an example of a
a macule
papule
is a small, solid, elevated skin lesion less than 0.5cm in diameter.
The top can be flat, pointed, or rounded.
seen in many skin diseases, including acne, fungal infections, and lichen planus.
papule
PUSTULE
is a small elevation of the skin containing cloudy or purulent material usually consisting of necrotic inflammatory cells.
These can be either white or red.
PUSTULE
vesicle
is a small fluid-filled blister
Less than 5 mm in size
vesicle
BULLA
- fluid-filled blister more than 5 mm (about 3/16 inch) in diameter with thin walls.
bulla
are caused by splitting or cracking
Fissures
An ________ is a discontinuity of the skin exhibiting incomplete loss of the epidermis a lesion that is moist, circumscribed, and usually depressed
erosion
An_____ is a discontinuity of the skin exhibiting complete loss of the epidermis and often portions of the dermis and even subcutaneous fat.[
ulcer
PETECHIAE
petechiae
one to two mm in size
These are less than 0.5 cm even in the later stages of the disease.
At any stage, they do not have a diameter of more than 3 mm.
PETECHIAE
purpura
A hemorrhagic area in the skin.
The area of bleeding within the skin
is greater than 3 millimeters in diameter
Early type is red and becomes darker, then purple, and brown-yellow as it fades.
It does not blanch when touched.
Purpura
ex. immune thrombocytopenic purpura and Schonlein-Henoch purpura.
Ecchymoses
A macular red or purple hemorrhage in skin or mucous membrane more than 2 mm in diameter.
Ecchymosis
Note: Ex. Dissiminated intravascular coagulopathy
_____________ typically presents in term neonates aged 3 days to 2 weeks
The pustules from below the stratum corneum or deeper in the epidermis and represents collection of eosinophils that also accumulate around the upper portion of pilosebaceous follicle
It is a is a benign self-limited eruption occurring primarily in healthy newborns in the early neonatal period.
It is characterized by macular erythema, papules, vesicles, and pustules, and it resolves without permanent sequelae
Erythema toxicum neonatorum (ETN)
________ – a superficial epidermal inclusion cysts that contain laminated keratinized material
Lesion is firm papule, 1-2mm in diameter and pearly opalescent white
Milia
inflammation of the upper layers of the skin, causing itching, blisters, redness, swelling, and often oozing, scabbing, and scaling
Known causes include contact with a particular substance, certain drugs, constant scratching, and fungal infection
DERMITITIS
skin inflammation caused by direct contact with a particular substance
rash is confined to a specific area, and often has clearly defined boundaries
CONTACT DERMATITIS
CONTACT DERMATITIS
CONTACT DERMATITIS
–
◦accounts for 80% of all cases of contact dermatitis
◦ occurs when a chemical substance causes direct damage to the skin
◦ symptoms are more painful than itchy
◦ Typical irritating substances are acids, alkalis (such as drain cleaners), solvents (such as acetone in nail polish remover), strong soaps, and plants (such as poinsettias and peppers)
Irritant Contact Dermatitis
◦Example diaper dermatitis
–
◦is a reaction by the body’s immune system to a substance contacting the skin.
◦substances found in plants such as poison ivy, rubber (latex), antibiotics, fragrances, preservatives, and some metals (such as nickel and cobalt)
◦ People may use (or be exposed to) substances for years without a problem, then suddenly develop an allergic reaction.
Allergic Contact Dermatitis
–
◦results only after a person touches certain substances and then exposes the skin to sunlight
◦Such substances include sunscreens, aftershave lotions, certain perfumes, antibiotics, coal tar
**Photoallergic or Phototoxic Contact Dermatitis **