Derm Flashcards
Koebner phenomenon
linear eruption at site of trauma
annular
circle or ring
discoid/ nummular
coin lesion
purpura
bleeding into skin, doesnt blanch on pressure
macule
freckle
flat area of altered colour
patch
large flat area of altered color or texture, vascular malformation
papule
xanthomata
raised solid lesion < 0.5cm in diameter
nodule
pyogenic granuloma
raised solid lesion > 0.5cm in diameter
plaque
palpable scaling lesion over 0.5cm in diameter
excoriation
loss of epidermis following trauma
eczema
lichenification
roughening of skin with accentuation of skin markings
rubbing in eczema
scales
flakes of stratum corneum
types of melanomas & epidemiology
SUPERFICIAL SPREADING: 50-75%
NODULAR: 15-35%
LENTIGO MALIGNA MELANOMA: 5-15%
ACRAL LENTIGINOUS MELANOMA: 5-10%
melanoma 5 yr survival rates
STAGE 1 (T <2MM THICK, N0, M0) - 90%, STAGE 2 (T>2MM THICK, N0, M0) – 80%, STAGE 3 (N≥1, M0) – 40- 50%, STAGE 4 (M ≥ 1) – 20-30%
granuloma annulare
SLOW-GROWING RINGS OF SMALL, FIRM, FLESH-COLORED TO RED PAPULES WITH CENTRAL INVOLUTION
CHILDREN AND YOUNG ADULTS
A/W DIABETES
No Tx needed mostly
pyogenic granuloma
BENIGN, VASCULAR, DOME-SHAPED PAPULE OR NODULE.
YELLOW TO RED, RAPIDLY GROWING LESION WITH MOIST TO SCALY SURFACE
SECONDARY TO TRAUMA OF SKIN OR MUCOUS MEMBRANES
TREAT WITH CURETTAGE AND CAUTERISATION
actinic keratosis
ERYTHEMATOUS, SCALY, ROUGH PAPULES OR PLAQUES +/- ADHERENT YELLOW CRUST
CAN PROGRESS TO SQUAMOUS CELL CARCINOMA
INCLUDING CRYOTHERAPY/CURETTAGE AND CAUTERY, EXCISION, TOPICAL TREATMENTS (5-FLUOROURACIL OR IMIQUIMOD)
Bowens disease
INTRAEPIDERMAL SQUAMOUS CELL CARCINOMA
IRREGULAR SCALY PATCH – ULCERATION
NON HEALING LESION
CAN PROGRESS TO SQUAMOUS CELL CARCINOMA
TREATMENT OPTIONS INCLUDE CRYOTHERAPY, SUPERFICIAL SKIN SURGERY, TOPICAL TREATMENT (5-FLUOROURACIL OR IMIQUIMOD THERAPY), PHOTODYNAMIC THERAPY
keratoacanthoma
1-2.5CM DOME-SHAPED PAPULE OR NODULE WITH A CENTRAL KERATIN-FILLED CRATER
RAPIDLY GROWS (6-8 WEEKS) AND MAY LOOK LIKE A SQUAMOUS CELL CARCINOMA
MOST COMMON ON SUN-EXPOSED SKIN
MAY INVOLUTE ON ITS OWN LEAVING A SCAR
TREATMENT IS EXCISION
HYPERKERATOTIC, SKIN-COLORED TO ERYTHEMATOUS PAPULE, NODULE, OR PLAQUE
SCALING ULCERATION CRUSTING
SCC
SECOND MOST COMMON SKIN CANCER SUN-EXPOSED SKIN 5% METASTASISE LIP OR EAR MORE AGGRESSIVE IN IMMUNOSUPPRESSED PATIENTS Tx mohs micrographic surgery, radiotherapy
WAXY, PEARLY, TRANSLUCENT PAPULE WITH TELANGIECTASIA AND ULCERATION
VERY RARELY METASTASISES
NODULAR BCC IS THE MOST COMMON BCC
4 types of BCC
nodular
superficial
pigmented
morpheaform
BCC tx
SURGERY (INCLUDING MOHS MICROGRAPHIC SURGERY), RADIOTHERAPY, TOPICAL TREATMENTS (5-FLUOROURACIL OR IMIQUIMOD),
CRYOTHERAPY
PAPULES OR VESICLES ON AN ERYTHEMATOUS BASE
dermatitis
atopic eczema
develops in early childhood, resolves in teenage years
a/w FHx of asthma, allergic rhinitis, atopy
Eczema complications
SECONDARY BACTERIAL INFECTION EG IMPETIGINISED CRUSTY WEEPY LESIONS OR SECONDARY VIRAL INFECTION EG ECZEMA HERPETICUM)
eczema in infants
face and extensor surfaces
eczema in children and adults
flexor surfaces
atopic dermatitis tx general
AVOID KNOWN EXACERBATING AGENTS, FREQUENT EMOLLIENTS +/- BANDAGES AND BATH OIL/SOAP SUBSTITUTE
atopic dermatitis tx topical
STEROIDS* FOR FLARE-UPS; TOPICAL IMMUNOMODULATORS (E.G. TACROLIMUS, PIMECROLIMUS)
atopic dermatitis tx oral
ANTIHISTAMINES FOR SYMPTOMATIC RELIEF, ANTIBIOTICS (E.G. FLUCLOXACILLIN) FOR SECONDARY BACTERIAL INFECTIONS, AND ANTIVIRALS (E.G. ACICLOVIR) FOR SECONDARY HERPES INFECTION
atopic dermatitis tx phototherapy & immunosuppressants
ORAL PREDNISOLONE, AZATHIOPRINE, CICLOSPORIN
mild topical steroids
hydrocortisone
hydrocortisone acetate
moderate topical steroids
x2-25 as potent as hydrocortisone
clobetasone butyrate
triamcinolone acetonide
potent topical steroids
x100-150 as potent as hydrocortisone
betamethasone valerate
betamethasone dipropionate
hydrocortisone 17-butyrate
Mometasone furoate
V potent topical steroids
x600 as potent as hydrocortisone
clobetasol propionate
betamethasone dipropionate
Seborrheic dermatitis
YEAST PITYROSPORUM OVALE, COMMON, AFFECTS 3-5% OF THE POPULATION
WHITE-YELLOWISH GREASY SCALE ON ERYTHEMATOUS PATCHES OR PLAQUES. INDISTINCT MARGINS.
CRADLE CAP in infants
Seborrheic dermatitis Tx
BABY SHAMPOO
ADULT KERATOLYTICS, TOPICAL ANTI-FUNGALS, TOPICAL STEROIDS OR TOPICAL TACROLIMUS
INFLAMMATION AND DEPOSITION OF HEME RESULTS IN THE ECZEMATOUS LESIONS
PROXIMAL TO THE MEDIAL MALLEOLUS
Stasis Dermatitis- Venous Eczema
Stasis Dermatitis- Venous Eczema Tx
SUPPORT STOCKINGS, LEG ELEVATION, WEIGHT REDUCTION, EMOLLIENTS AND TOPICAL STEROIDS
SHARPLY DEMARCATED PRURITIC, ERYTHEMATOUS PLAQUES WITH OVERLYING SILVER SCALE
SCALP, ELBOWS, KNEES (EXTENSOR)
psoriasis
psoriasis complications
ARTHRITIS (5-8% OF PATIENTS), SECONDARY INFECTION, ERYTHRODERMA, PSYCHOLOGICAL AND SOCIAL EFFECTS
psoriasis precipitating factors
INCLUDE TRAUMA, INFECTION (EG TONSILLITIS – CAN CAUSE “GUTTATE” PSORIASIS), DRUGS, STRESS, ALCOHOL
auspitz sign
pinpoint bleeding upon removal of scale in psoriasis
Tx topical
VITAMIN D ANALOGUES, TOPICAL CORTICOSTEROIDS, COAL TAR PREPARATIONS, DITHRANOL, TOPICAL RETINOIDS, KERATOLYTICS AND SCALP PREPARATIONS
Tx phototherapy
UVB AND PHOTOCHEMOTHERAPY I.E. PSORALEN+UVA
Tx oral
METHOTREXATE, RETINOIDS, CICLOSPORIN, MYCOPHENOLATE MOFETIL, FUMARIC ACID ESTERS, BIOLOGICAL AGENTS (E.G. INFLIXIMAB, ETANERCEPT, EFALIZUMAB)
topical tx for mild acne
6 weeks
BENZOYL PEROXIDE AND TOPICAL ANTIBIOTICS (ANTIMICROBIAL PROPERTIES), AND TOPICAL RETINOIDS (COMEDOLYTIC AND ANTI-INFLAMMATORY PROPERTIES)
oral tx for moderate to severe acne
ORAL ANTIBIOTICS OR ANTI-ANDROGENS (IN FEMALES). ORAL RETINOIDS (FOR SEVERE ACNE)
ERYTHEMA, FLUSHING AND PAPULES
RHINOPHYMA (ESPECIALLY MEN)
acne rosacea
acne rosacea
AVOIDANCE MEASURES, TOPICAL THERAPIES (EG METRONIDAZOLE GEL), ORAL ANTIBIOTICS (EG TETRACYCLINE ANTIBIOTICS), ORAL ISOTRETINOIN IF RESISTANT
CRUSTED GOLDEN LESIONS
IMPETIGO
TREAT WITH TOPICAL ANTI-BACTERIALS
CELLULITIS – INVOLVING DEEP SUBCUTANEOUS TISSUES – MOSTLY LOWER LIMBS
TREAT WITH ORAL ANTIBIOTICS EG FLUCLOXACILLIN
2-5MM FLESH-COLORED PAPULES WITH CENTRAL UMBILICATION
CLEAR SPONTANEOUSLY WITHIN 6-9 MONTHS
MOLLOSCUM CONTAGIOSUM
POX VIRUS, CHILDREN, CONTACT/TRAUMA
PARVOVIRUS B19
CHILDREN AGED 3-12 FADES SPONTANEOUSLY
PREGNANT WOMEN RISK OF FOETAL HYDROPS IN FIRST HALF OF PREGNANCY
ERYTHEMA INFECTIOSUM
SLAPPED CHEEK
FIFTH DISEASE
OVAL, MINIMALLY ELEVATED, PRURITIC, SCALING PATCHES, PAPULES, AND PLAQUES. TANNISH PINK/SALMON COLOURED
IDIOPATHIC (POST-VIRAL?) SELF-LIMITING INFLAMMATORY LESIONS, OCCUR MOST COMMONLY IN YOUNG ADULTS IN THE COOLER MONTHS
MOST COMMONLY OVER TRUNK IN A “CHRISTMAS TREE” PATTERN (FOLLOWS SKIN LINES)
HERALD PATCH IS INITIAL, LARGE, SINGLE LESION FOLLOWED BY GENERALIZED RASH DAYS TO WEEKS LATER.
SELF-LIMITED CONDITION THAT RESOLVES OVER 6-8
WEEKS. MANAGEMENT OF SYMPTOMS: ANTI-HISTAMINES, MOISTURIZERS
PITYRIASIS ROSEA
FEW TO HUNDREDS OF SKIN LESIONS ERUPT WITHIN A 24-HOUR PERIOD
HERPES SIMPLEX VIRUS
ERYTHEMA MULTIFORME
FUNGAL SKIN INFECTIONS
DERMATOPHYTES (TINEA/RINGWORM), YEASTS (E.G. CANDIDIASIS, MALASSEZIA), MOULDS (E.G. ASPERGILLUS)
ITCHY, CIRCULAR OR ANNULAR LESIONS WITH A CLEARLY DEFINED, RAISED AND SCALY EDGE
TINEA CORPORIS
FUNGAL SKIN INFECTIONS Dx
KIN SCRAPINGS, HAIR OR NAIL CLIPPINGS (FOR DERMATOPHYTES); SKIN SWABS (FOR YEASTS)
FUNGAL SKIN INFECTIONS Tx
TOPICAL ANTIFUNGAL AGENTS (E.G. TERBINAFINE CREAM)
ORAL ANTIFUNGAL AGENTS (E.G. ITRACONAZOLE) FOR SEVERE, WIDESPREAD, OR NAIL INFECTIONS
TINY RED INTENSELY ITCHY BUMPS ON THE LIMBS AND TRUNK
Scabies
Scabies tx
PERMETHRIN X 8 HRS
PINK WHEALS (TRANSIENT), MAY BE ROUND, ANNULAR, OR POLYCYCLIC
ACUTE URTICARIA
ulcer in malleolar area
venous
ulcer in pressure and trauma sites, pretibial, supramalleolar, distal points
arterial
ulcer in pressure sites
soles heels toes metatarsal heads
neuropathic
large shallow irregular ulcer
exudative & granulating base
venous
small sharply defined deep ulcer
necrotic base
arterial
granulating base ulcer +/- callus
neuropathic
leg oedema, haemosiderin, melanin, lipodermatosclerosis, atrophie blanche
venous
cold shiny skin
weak PP
hair loss
arterial
peripheral neuropathy
neuropathic ulcer
normal ABPI 0.8 - 1
arterial
ABPI under 0.8
doppler studies and angiography
arterial
ABPI under 0.8
xray to exclude osteomyelitis
neuropathic
compression bandaging tx for venous but CI in
arterial ulcers
Neuropathic ulcer tx
wound debridement
regular repositioning
footwear
nutrition