exam 1 Flashcards
3 ways to describe a rash
color, morphology, size
3 morphology of primay lesion
fluid filled vs solid
color
scale or no scale
distrubution of a rash can either be ____ or ____
diffuse (all over) or localized
describe symmetrical distrubution
bilateral in the same area of the boday
acral sites on the body are where?
palms, soles of feet, no and ears
with a blister, a lesion that is <1cm
vesicle
with a blister, a lesion that is >1cm
bullae
what is Nikolsky sign?
when skin sloughs off when pressed aginst it
Dyshidrotic eczema
* Herpes simplex
* Impetigo
* Varicella/zoster
* Tinea pedis
* Scabies
* Contact dermatitis
* Hand foot and mouth
* Polymorphic light eruption
* Grover’s disease
* Arthropod assaults
* Erythema multiforme
* Dermatitis herpetiformis
* Id reaction
are all examples of
Vesicles (≤1 cm)
fluid filled lesions
- Bullous impetigo
- Bullous tinea
- Trauma/thermal
- Bullous erythema multiforme
- Staph scalded skin
- Stephens Johnson Syndrome
- Toxic epidermal necrolysis
- Autoimmune blistering disease
- Bullous drug eruption
- Lichen planus
- Porphyria cutanea tarda
- Diabetic bullae
are all examples of
Bullae (≥1 cm
fluid filled lesions
algorithm
moph. prime. lesion
(same size and shape)
usually solitary papules and dome-shaped
Monomorphic
(inflammatory lesions)
(varied size and shape),
multiple, often confluent, flat-topped
Polymorphic
(vascular reaction)
*Petechiae
*Coagulation disorders
*Leukocytoclastic vasculitis
*Henoch-Schonlein purpura
*Ecchymoses
*Meningococcemia
*Rocky Mountain Spotted
Fever
*Vascular ulcers
are all examples of
Purpuric/non-blanchable
(polymorphic/vasculr)
*Kawasaki disease
*Staph scalded skin
*Toxic shock syndrome
*Red man syndrome
*Angioedema
*Autoimmune blistering
diseases
*Erythema multiforme
*Erythema nodosum
*Drug eruption
*Urticarial vasculitis
Persistent/blanching
(polymorphic/vasculr)
*Rosacea
*Urticaria
are all exaples of
Transient
(polymorphic/vasculr)
*Furuncles
*Carbuncles
*Epidermoid cysts
*Cellulitis
*Erythema nodosum
*Acne vulgaris
*Mycosis fungoides
are all examples of
Nodules
Monomorphic
Inflammatory Lesions
Macules and papules
*Arthropod assaults
*Spider and cherry angiomas
*Scabies
*Acne
*Keratosis pilaris
*Candidiasis
*Pyogenic granulomas
*Granuloma annulare
*Viral exanthems
*Early psoriasis lesions
*Pityriasis rosea (w/o scale)
*Secondary syphilis (the
‘great imitator’)
*Pityriasis lichenoides
*Grover’s disease
are all examples of
Monomorphic
Inflammatory Lesions
red scaly lesion with epitheial disruption
Eczematous
red scaly lesion with no epitheial disruption
Papulosquamous
Atopic dermatitis
* Irritant contact dermatitis
* Allergic contact dermatitis
* Dyshidrotic eczema
* Nummular eczema
* Stasis dermatitis
* Scabies
* Secondary lesions (DH, tinea, etc.)
* Seborrheic dermatitis
* Polymorphic light eruption
* Lichen planus
* Eczematous reaction patterns
* Cutaneous T cell lymphoma
* Xerotic eczema
* Exfoliative erythroderma
are all examples of
Eczematous
Epithelial Disruption
- Psoriasis
- Tinea
- Lupus erythematosus
- Discoid lupus
erythematosus - Cutaneous T cell
lymphoma (mycosis
fungoides) - Pityriasis rubra pilaris
- Lichen planus
- Darier’s disease
- Exfoliative erythroderma
are all examples of
Prominent plaques
Papulosquamous
No Epithelial Disruption
- Pityriasis rosea
- Keratosis pilaris
- Seborrheic dermatitis
- Tinea
- Lichen planus
- Secondary syphilis
- Guttate psoriasis
- Pityriasis lichenoides
(PLC or PLEVA)
are all examples of
Papules
Papulosquamous
No Epithelial Disruption
are flat or slightly elevated with a central core, circumscribed, painful lesions with a smooth, hard surface
Corns
A superficial area of hyperkeratosis is called a
callus
They may be flat, raised, dome-shaped, smooth, rough, or hairy. Their color ranges from pink, tan, gray, blue, and shades of brown, to black.
nevi (moles)
There is a strong association between _______ and the number of nevi.
sun exposure
Atypical nevi tend to occur on heavily sun damaged skin, classically ______ in men and on the ____ in women
upper back
legs
areas of hyperpigmentation on the face and neck that are associated with pregnancy or hormonal variation
melasma
Alterations in color in dark-skinned persons are best seen in what 7 areas
the sclera
conjunctiva
buccal mucosa
tongue
lips
nail beds
palms.
Sharp, oval, or circular; depigmented halo around nevus; may undergo many morphologic changes; usually disappears and halo repigments (may take years)
Halo nevus
occurence for Halo nevus
Usually on back in young adult
Usually benign; biopsy indicated because same process can occur around melanoma
occurence for Intradermal nevus
Cells limited to dermis
No indication for removal other than cosmetic
occurence for Junction nevus
Nevus cells lining dermoepidermal junction
Should be removed if exposed to repeated trauma
occurence for Compound nevus
Nevus cells in dermis and lining dermoepidermal junction
Should be removed if exposed to repeated trauma
occurence for Blue nevus
Nevus cells in dermis
Typically benign, but should be removed if changes occur
Dome-shaped; raised; flesh to black color; may be pedunculated or hair bearing
Intradermal nevus
Flat or slightly elevated; dark brown
Junction nevus
Slightly elevated brownish papule; indistinct border
Compound nevus
May be present at birth; may cover large area; hair growth may occur after several years
Congenital nevus
Normal Nevus color
Uniformly tan or brown; all nevi on one person tend to look alike
Normal Nevus shape
Round or oval with a clearly defined border that separates the nevus from surrounding skin
Normal Nevus surface
Begins as flat, smooth spot on skin; becomes raised; forms a smooth bump
Normal Nevus size
Usually less than 6 mm (size of a pencil eraser)
Normal Nevus number
Typical adult has 10–40 nevi scattered over the body
Normal Nevus location
Usually above the waist on sun-exposed surfaces of the body; scalp, breast, and buttocks rarely have normal nevi
Atypical Nevus color
Mixture of tan, brown, black, and red/pink; nevi on one person often do not look alike
Atypical Nevus shape
Irregular borders may include notches; may fade into surrounding skin and include a flat portion level with skin
Atypical Nevus surface
May be smooth, slightly scaly, or have a rough, irregular, “pebbly” appearance
Atypical Nevus size
Often larger than 6 mm and sometimes larger than 10 mm
Atypical Nevus number
Many persons do not have increased number; however, persons severely affected may have more than 100 nevi
Bleeding into the skin results in ecchymoses (i.e., bruising); pinpoint bleeding from capillaries is called
(smaller than 0.5 cm in diameter)
petechiae
atypical nevus location
May occur anywhere on the body, but most commonly on back; may also appear below the waist and on scalp, breast, and buttocks
Bleeding into the skin results in ecchymoses (i.e., bruising); pinpoint bleeding from capillaries is called
larger than 0.5 cm in diameter)
purpura
lesion that occur as initial spontaneous manifestations of a pathologic process
primary
that result from later evolution of or external trauma to a primary lesion
secondary
Clostridium gas gangrene smells like
rotten apples
Proteus infection smell like
mousy
Pseudomonas infection (especially burns) smell like
grapelike
Tuberculous lymphadenitis (scrofula) smells like
stale beer
Anaerobic infection; scurvy smells like
putrid
Phenylketonuria smells like
mousy/ musty
A flat, circumscribed area that is a change in the color of the skin; less than 1 cm in diameter
Macule
Freckles, flat nevi, petechiae
An elevated, firm, circumscribed area; less than 1 cm in diameter
papule
A flat, nonpalpable, irregularly shaped macule greater than 1 cm in diameter
patch
Elevated, firm, and rough lesion with flat top surface greater than 1 cm in diameter
plaque
Elevated, irregular-shaped area of cutaneous edema; solid, transient, variable diameter
wheal
Elevated, firm, circumscribed lesion; deeper in dermis than a papule; 1–2 cm in diameter
nodule
Elevated and solid lesion; may or may not be clearly demarcated; deeper in dermis; greater than 2 cm in diameter
tumor
Elevated, circumscribed, superficial, not into dermis; filled with serous fluid; less than 1 cm in diameter
vesicle
Vesicle greater than 1 cm in diameter
bulla
Elevated, superficial lesion; similar to a vesicle but filled with purulent fluid**
pustule
Elevated, circumscribed, encapsulated lesion; in dermis or subcutaneous layer; filled with liquid or semisolid material
cyst
Fine, irregular, red lines produced by capillary dilation
Telangiectasia
Heaped-up, keratinized cells; flaky skin; irregular; thick or thin; dry or oily; variation in size
scale
Rough, thickened epidermis secondary to persistent rubbing, itching, or skin irritation; often involves flexor surface of extremity
Lichenification
Irregularly shaped, elevated, progressively enlarging scar; grows beyond the boundaries of the wound; caused by excessive collagen formation during healing
keloid
Loss of the epidermis; linear hollowed-out, crusted area
Excoriation
Linear crack or break from the epidermis to the dermis; may be moist or dry
fissure
Loss of part of the epidermis; depressed, moist, glistening; follows rupture of a vesicle or bulla
erosion
Loss of epidermis and dermis; concave; varies in size
ulcer
Dried serum, blood, or purulent exudates; slightly elevated; size varies; brown, red, black, tan, or straw-colored
crust
Thinning of skin surface and loss of skin markings; skin translucent and paper-like
Atrophy
lesion arrangement that Following a nerve or segment of the body
Zosteriform (dermatomal)
lesion arrangement that is Interlocking or coalesced circles (formed by enlargement of annular lesions)
Polycyclic
lesion arrangement Pink macules with purple central papules
Iris/target lesion
lesion arrangement Snakelike or wavy line track
Serpiginous
lesion arrangement Netlike or lacy
Reticulate