DERMATOLOGY

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DERMATOLOGY
BACTERIAL VIRAL INFECTIONS OF THE SKIN
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FOLLICULITIS
Staph aureus Superficial erythematous papules
crusts of hair follicles in the beard area.
Condition was chronic, aggravated by shaving.
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FOLLICULITIS
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FOLLICULITIS
Pseudomonas aeruginosa Multiple follicular
pustules are present on the trunk, appearing 3
days after bathing in a hot tub. P. aeruginosa
isolated on culture from a lesion. Lesions
resolved spontaneously within a week.
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FURUNCLE
Staph aureus A painful abscess with associated
facial edema in an otherwise healthy 25-year-old
male. The patient felt systemically ill. The
infection resolved with oral dicloxacillin.
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FURUNCLE
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CARBUNCLE
Staph aureus - Large, inflammatory plaque studded
with multiple pustules, some have ruptured,
draining pus, on the nape of the neck. This very
painful area is surrounded by erythema and edema,
extends down to fascia, formed from a confluence
of many furuncles.
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CARBUNCLE
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HIDRADENITIS SUPPURATIVA
Many comedones, some of which are paired, are a
characteristic finding, associated with several
deep exquisitely painful abscesses and old scars
in the axilla.
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HIDRADENITIS SUPPURATIVA
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IMPETIGO
Staph aureus Crusted erosions on the arm of a
child. The confluence of lesions in the
antecubital fossa suggests prior atopic
dermatitis at the site that became secondarily
infected.
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IMPETIGO
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BULLOUS IMPETIGO
Staph aureus A large, single bulla with
surrounding erythema and edema on the thumb of a
child the bulla has ruptured only in the center
and clear serum exudes from it.
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BULLOUS IMPETIGO
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ERYSIPELAS
Group A streptococcus Painful, shiny,
erythematous, edematous plaques involving
eyelids, cheeks, and the nose of an elderly
febrile male. On palpation the skin is hot and
tender. Portal of entry was conjunctivitis.
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CELLULITIS
Staph aureus Portal of entry of infection is
seen on the lateral thigh with necrosis of skin
infection has extended mainly proximally from
this site.
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CELLULITIS
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NECROTIZING FASCIITIS
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VERRUCA
Verruca vulgaris Hyperkeratotic papules located
on dorsum of a finger. Similar lesions were
present on all fingers of both hands.
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VERRUCA
Verruca plantaris Confluent, skin-colored,
verrucous papules, disrupting normal
dermatoglyphics of the plantar foot. The
thrombosed capillaries differentiate the lesion
from a corn callus.
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CONDYLOMA ACUMINATUM
Multiple, soft papules, discrete with some
coalescing to raspberry-like lesions, on the
glans penis and prepuce.
Multiple, pink-brown, soft papules on the labia
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HERPES VIRUS
Primary gingivostomatitis Multiple, very painful
erosions on the lower labial mucosa with erythema
and edema of the gingiva. Fever and tender
submandibular LAD also present
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HERPES VIRUS
Recurrent herpes labialis Grouped and confluent
vesicles with an erythematous rim on the lips, 24
h after onset of symptoms
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HERPES VIRUS
Recurrent infection of the penis Group of
vesicles with early central crusting on a red
base arising on the shaft of the penis.
Recurrent vulvar infection Large painful
erosions on the labia
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VARICELLA VIRUS
Chicken pox - Multiple, pruritic, erythematous
papules, vesicles ("dewdrops on a rose petal"),
crusts on erythematous bases on face and neck of
a young female. The spectrum of lesions, arising
over 7 to 10 days.
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VARICELLA VIRUS
Zoster - T8 to T10 dermatomes Typical grouped
vesicles and pustules with erythema and edema of
three contiguous thoracic dermatomes on the
posterior chest wall.
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MOLLUSCUM CONTAGIOSUM
Discrete, solid, skin-colored papules, 1 to 2 mm
diameter, with central umbilication on the
chest of an adolescent female. The lesion with
an erythematous halo is undergoing spontaneous
regression.
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PITYRIASIS ROSEA
Herald patch Christmas tree pattern
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PITYRIASIS ROSEA