Dermatology quiz

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Sajid Nazir 2009

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Transcript of Dermatology quiz

Page 1: Dermatology quiz

Sajid Nazir 2009

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How would you manage it?

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almost never metastasizes but it may kill by local invasion

commonest skin cancerincidence is related to sunlight exposure75% occur in the head and neckInitial small pearly white lesion,

telengectasia, central ulceration and rolled edges, bleed-ulcerate-heal again

Treatment is excision by specialist, send for histology

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How would you manage and what treatment would you avoid?

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Flushing, papules and pustules - forehead, bridge of the nose and cheeks

Unknown aetiologyPrecipitated by topical steroids, sunlight,

alcohol, hot drinkstopical metronidazole topical azelaic acid oral tetracycline

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How would you manage it?

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Small white yellow papules that occur on face and neck

Common in newborns and are transientBelieved to originate from maldeveloped

sweat glandsOften rupture and skin and no treatment is

required

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What features support diagnosis?What would you do with this patient?

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Asymmetrical, irregular border and colour, increasing size

Urgent referralPrognosis related to thickness (Breslow)

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How would you manage?

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Usually appear in first 2 decadesNo treatment requiredMay be excised if malignant change

suspected or for cosmetic reasons

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Characteristically: rapidly expanding painless, ulcerated nodule, rolled indurated margin.

Commonly ulcerate and bleedPotential to metastasizeMust refer for biopsy/excision

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Slowly expanding pink, scaly plaque that has a sharply defined border

Risk of invasive SCC (3-5%)Histology requiredManagement options include watchful

waiting, topical fluorouracil, cryotherapy, curettage, excision, laser

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What are the erythematous areas called?Name 2 causes

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Target LesionsCauses: barbiturates, aspirin, sulphonamides,

herpes simplex , TB, mycoplasma, typhoid, pregnancy, vit c deficiency, collagen vascular disease, IBD

Treat causesSymptomatic Rx e.g. AntihistaminesHeals in 3 weeks

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How would you treat them?

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hyperpigmented or scaly lesions, usually brown with a scaly base

marked thickening of the keratin layer Can progress to SCCTopical diclofenac 3%, 5-fluorouracil, topical

retinoidsphysical treatment e.g. cryotherapy,

curettage, local excision

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Varicella zoster virusUnilateralaciclovir administration of 800 mg five times

per day for 7 days Can result in post-herpetic neuralgia

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How would you treat it?

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Spares face, hands and feettopical antifungal therapy or with steroidOral terbenfaine/itraconazole

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What is this called and what causes it?

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Erythema Ab IgneReddened skin due to longterm infrared

radiation exposureCommon in elderly who sit in front of heaterOr use of a hot water bottle as in this caseLaptops may cause it!!Mild cases resolves spontaneously if you

remove source, others are permanent

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What is this and what diseases may it be associated with?

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Erythema nodosum is a reactive process of unknown pathogenesis

Causes: streptococcal infection, sarcoidosis. Pregnancy, the oral contraceptive pill, inflammatory bowel disease, tuberculosis

In 50% of cases the cause is not identified.Must to bloods and CXR to investigate

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What are these patches?

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Screen for other autoimmune disorders eg thyroid

No treatment required

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What are these patches?They were on the patients back

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yeast infectionUsually noted after a holiday when normal

skin tansMild or localised pityriasis versicolor may

clear with repeated applications of a topical imidazole cream

oral imidazole (ketoconazole, fluconazole or itraconazole) for extensive infections

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THANK YOU!