Intro to Derm - Erythematous Lesions Flashcards
A primary skin lesion that is:
- two types of flat spots on skin and size
macule - less than 1cm
patch - greater than 1cm (can’t feel v. bulla which you can feel)
A primary skin lesion that is:
- two types of nonpustular, nonvesicular lesion on skin and size
Papule - less than 1cm (erythema nodosum)
Nodule - greater than 1cm
A primary skin lesion that is:
- blister and size
vesicle less than 1cm
bulla - greater than 1cm (can feel v. patch that you cannot feel
A primary skin lesion with a collection of leukocytes in the epidermis (i.e. acne)
pustule
A primary skin lesion that is elevated flat lesions >1cm
plaque (atopic dermatitis, cellulitis
-annular, erythematous papules, scaling, eczematous, pruritic.
What is this?
What nonspecific histo?
Where does it appear?
Atopic dermatitis
Spongiosus
Appears on face in infancy and antecubital fossa in adulthood.
Pathogenesis of atopic dermatitis.
Tx
T cell type 1 HSR, allergens, irritants, increased IgE
Moisture, avoid irritants, antipruritic, antiinflamm
Erythematous, non scaling, tender, warm, poorly demarcated boggy plaque. Localized with sepsis from acute infection rapidly spreading nonsuppurative infection
What is this.
Notable fact about location of infection
Cellulitis
Infection of skin and underlying soft tissue, NOT including muscle.
Pathogenesis of cellulitis.
Risk factors (2).
Tx.
Pathogenesis is trauma usually in an extremity or ulcer - Staph aureus or Strep pyogenes infection.
Risk factors are stasis dermatitis and lymphedema.
Tx - 1st gen cephalosporins, macrolides, clindamycin. Elevation
Location (gross and histo) of cellulitis.
Extremities, spreading infection of the deeper dermis and subcutaneous tissues.
Painful inflammatory lesion of subcutaneous fat, usually on anterior shins. Symmetrical, erythematous, non-scaling, TENDER, nodules/plaques
Erythema Nodosum
Pathogenesis of erythema nodosum.
Do what test after dx?
Tx
SARCOIDOSIS or HS response
FU with CXR, ESR, ACE (sarcoidosis)
Tx - anti-inflammatory, d/c any new meds that started w/in 6-8wks
Acanthosis with parakeratotic scaling, Munro microabscesses. Clubbed rete ridges, no stratum granulosum, tortuous vessels in papillary dermis.
What is this?
What is its characteristic presentation?
Psoriasis presenting with erythematous, scaling with silvery surface.
What type of lesions are psoriasis (location).
**papulosquamous
Describe 4 associated characteristics with psoriasis (NKAW)
Nail pitting
Koebner - spread after trauma
Auspitz - pinpoint bleeding
Wornoff’s ring - hyperpigmentation after psorasis clears
What type of psoriasis is this:
Well demarcated, scaly plaque. Coin shaped, annular, thick (elbows, knees, belly button).
- Plaque psoriasis
What type of psoriasis is this:
Painful, fever, drug eruption, subcorneal pustular dermatosis.
Pustular psoriasis
What type of psoriasis is this:
Children and young adults. POST STREP INFECTION. Trunk only.
Guttate psoriasis
Steel gray nuclei, multinucleated giant cells with eosinophilic intranuclear inclusions.
Herpes Zoster
Tx for Herpes Zoster
antivirals, pain control, shingles vaccine at 60 years
