Ch. 12 - Pustules Flashcards
T/F: Not all pustular dermatoses are caused by pathogenic microorganisms.
True
Collections of neutrophils that are situated superficially, usually in a hair follicle or just below the stratum corneum.
Pustule
What is the most common dermatologic disease with negative psychosocial ramifications?
Acne
A disorder affecting pilosebaceous units in the skin.
acne vulgaris
What are the hallmark of acne vulgaris?
comedones
non-inflamed lesions in acne
comedones
What are the two types of comedones?
- open comedone - “black head”; dilated pore filled with black keratinous material
- closed comedone - “white head”; small, flesh-colored, dome-shaped papule
What are the 3 types of inflammatory acne lesions?
- papules
- nodules
- pustules
Where is acne found?
areas with numerous sebaceous glands (face & upper trunk)
What is caused by use of corticosteroids and is distinguished from acne vulgaris by its sudden onset and appearance?
Steroid acne
What is the most important aspect of a successful acne treatment program?
patient compliance
What are the 3 factors involved in acne pathogenesis?
- androgens
- follicular obstruction
- Propionibacterium acnes (bacteria)
What disorder represents an inflammatory reaction in the skin resulting from infection of the epidermis with Candida albicans?
Candidiasis
Which disorder appears as a ‘beefy red’ erythematous area with surrounding satellite papules and pustules?
Candidiasis
Who is Candidiasis particularly common in?
diaper-clad infants & in hospitalized patients
an inflammatory reaction of the hair follicle caused by bacteria, usually S. aureus. The lesion appears as a pustule, often with a central hair.
folliculitis
Where can colonization of S. aureus occur with folliculitis?
nose, axillae, & groin
T/F: Folliculitis is usually asymptomatic; occasionally, patients complain of mild discomfort associated with the lesions.
TRUE
Hot-tub folliculitis occurs in individuals exposed to hot-tubs and swimming pools contaminated with what microorganism?
Pseudomonas aeruginosa
a disorder of the neck and jaw of men whose beard hairs are sharply curved. This configuration causes the hairs to re-enter the skin, where they induce an inflammatory reaction, resulting in papules and pustules.
Pseudofolliculitis barbae
a common follicular disorder that presents as tiny, rough, scaling, follicular papules (NO pustules) on the backs of the upper arms, buttocks, thighs, and facial cheeks.
Keratosis pilaris
follicular disorder manifested by pruritic papules on the face & trunk; it is most frequently found in HIV infected patients .
Eosinophilic folliculitis
Patient’s with recurrent follicullitis may be…
chronic ‘carriers’ of S. aureus
represents a superficial skin infection caused by Gram-positive bacteria, usually S. aureus, and less commonly Streptococcus pyrogenes. The early lesions are pustules, which quickly break to form crusts.
Impetigo
What is the most common bacterial infection in children?
impetigo
What is the most commonly encountered clinical finding in impetigo?
honey-colored crust
Where is the most common areas impetigo is found on the body?
face & around the nose & mouth
T/F: impetigo affects the dermal layer of skin.
FALSE; (does not extend deeply, no ulcers form)
streptococcal infection that goes deeper than the epidermis, so when the crust is removed an ulcer is noted.
ecthyma
T/F: honey-coloredd crusts indicate that the skin is primarily infected in impetigo?
FALSE; (secondarily)
a chronic inflammatory disorder affecting the blood vessels and pilosebaceous units of the face clinically presenting with papules & pustules are superimposed on a background of erythema & telangiectasia.
Rosacea
What are the 4 major clinical subtypes of rosacea?
- vascular
- papulopustular
- rhinophyma
- ocular
What aspect of the body is associated with rosacea?
the central third of the face and spares the lateral aspects of the forehead and cheeks
What sometimes develops in patients with rosacea?
Rhinophyma
a rare deep fungal infection presenting with skin manifestations caused by dimorphic fungus that presents as initial formation of pustules, plaques, & nodules evolving into verrucous plaques.
Coccidioidomycosis
a dermatophytic infection, frequently of the scalp, that appears as an indurated, boggy, inflammatory plaque studded with pustules
kerion
What is the most common organism causing a kerion?
Trichophyton rubrum
pustules infecting hair follicles
dermatophytes
represents a systemic infection characterized by fever, arthralgia, tenosynovitis, septic arthritis, & hemorrhagic pustules.
Gonococcemia (gonococcal arthritis-dermatitis syndrome)
Pustules in bacterial sepsis are…
purpuric
Sterile pustules are the hallmark of what skin condition?
subcorneal pustular dermatosis
What disease is characterized by annular or expanding, polycyclic collections of pustules on a red base?
subcorneal pustular dermatosis
