Flashcards in Dermatology Deck (38):
What are the risk factors for BCC?
What is the typical morphology of BCC?
Papule / nodule
Where on the body are BCCs found?
Face, head and neck
Which condition is a precursor to SCC?
What is the typical appearance of actinic keratosis?
Forehead / face
Rough gritty texture on touch
What are the risk factors for actinic keratosis?
What is the order of mortality for SCC, BCC and MM?
From highest mortality to lowest mortality
MM > SCC > BCC
What is the treatment for SCC?
Excision and desiccation
Alternatively: Radiation or 5-FU cream
How do you assess an acquired mole / melanoma?
- Diameter >6mm
Refer if more than 3
What are the features of MM?
Pigmented papules / plaues / nodules
May crust, bleed or erode
What are the risk factors for melanoma?
Tanning booth use
What is the glascow 7 criteria for moles and melanomas?
When should one excise a mole?
4. Diameter >7mm
6. Oozing / bleeding
7. Itch / odd sensation
Any lesion with 1 major feature should be considered for EXCISION.
What are the features of Rosacea?
How may you differentiate symptoms and features of Rosacea from SLE?
Worse with sun, hot spicy foods, alcohol
No comedones (unlike acne vulgaris)
Dx from SLE by
- oral ulcers
- discoid lesions
- malar rash
Which part of the body does atopic dermatitis spare?
Unlike rosacea or acne vulgaris which does affect nose
What are the features of eczematous lesions?
cracked and dry
Weeping clear fluid
Which sites does eczema affect in todlers and babies?
Which sites does eczema affect children/adolescents?
Which sites does eczema affect in adults?
Which bacterial infections does actopic dermatitis make people succeptible to?
What is the treatment and management of atopic dermatitis?
Avoid triggers (e.g. dry skin, irritants)
Skin care (tepid baths, mild soaps, moisturisers)
Acute inflammation - topical steroid, antihistamines
What is the steps up the steroid cream ladder?
Hydrocortisone (0.5% or 1%)
What are some causes of contact dermatitis?
Allergic reaction to an irritant e.g.
- poison ivy
- metal (nickel)
- topical medications
Irritating chemicals (not an allergy like the above, everyone will react to these with dermatitis)
How is contact dermatitis treated?
Low potent steroid on face, higher used elsewhere
How does seborrheic dermatitis present and where on the body does it usually manifest?
- Mild dermatitis caused by fungus
- Scaly, greasy, flakly, itchy, red skin
- Sebaceous glands of skin affected such as nasolabial fold, scalp, hairline, eyelids, eyebrows, central face, ear canals, central chest
What is the treatment for seborrheic dermatitis?
Low potency topical steroid
e.g. Daktacort / Ketoconazole cream or shampoo (good for cradle cap)
How may you differentiate irritant diaper dermatitis from candidiasis?
Fungal candidiasis will have satellite lesions and involves skinfolds
Irritant diaper dermatitis is red, erosional and spares the skin folds, mainly affecting convex areas
What is the treatment / management for irritant diaper dermatitis?
Looser nappies / remove nappies
Fix source of problem - i.e. diarrhoea?
What is the treatment for urticaria?
What is it usually caused by?
Allergic reaction to meds / insects / foods
What is the cause of psoriasis?
Immune cells trigger hyperproliferative skin and scale
Triggered by infections, therefore more severe in HIV/Immunocompromised
What social factors puts someone at increased risk of psoriasis?
What nail changes are present in psoriasis?
Onchydodystrophy / Onycholysis
What is the treatment for psoriasis?
Calcipotriene (vit D analog)
NEVER USE SYSTEMIC STEROIDS!
How may you differentiate pemphigus vulgaris and bullous phemphigoid?
Pemphigus vulgaris are superficial bullae that rupture easily
Bullous pemphigoid are deep, tense bullae that do not rupture easily
What is erythema nodosum and where on the body is it usually seen?
Inflammatory condition of the fat cells under skin - tender red nodules or bumps
Often on lower legs, WITHOUT ulceration
What is the treatment for erythema nodosum?
Treat underlying trigger (infection, abx, OCP, pregnancy) and NSAIDs
How may you differentiate Drug Induced Hypersensitivity Syndrome from SJS/TEN?
Does not involve the mucous membranes (unlike in SJS/TEN)
What are some common drugs that cause DIHS?