Dermatology Flashcards
When would you admit a child with new onset purpura to hospital?
Always - never a normal finding
What can be used to treat hyperhidrosis?
Topical aluminium chlroride
What is the most common malignancy associated with acanthosis nigricans?
Gastrointestinal adenocarcinoma
Which drugs are known triggers of erythema nodosum?
Penicillins, sulphonamides, combined oral contraceptive pill
Which virus causes eczema herpeticum?
Herpes 1
Acquired ichthyosis is associated with which malignancy?
Lymphoma
Dermatomyositis is associated with which malignancies?
Ovarian and lung cancer
Tylosis (thickening of the skin on palms and soles) is associated with which malignancy?
Oesophageal
How do you treat pityriasis versicolour?
ketoconazole shampoo
How do you treat keloid scars?
Intra-lesional steroids e.g. triamcinolone
Excision is sometimes required but careful consideration needs to given to the potential to create further keloid scarring
How does HHT present? (Hereditary haemorrhagic telangiectasia)
epistaxis : spontaneous, recurrent nosebleeds
telangiectases: multiple at characteristic sites (lips, oral cavity, fingers, nose)
visceral lesions: for example gastrointestinal telangiectasia (with or without bleeding) pulmonary arteriovenous malformations (AVM), hepatic AVM, cerebral AVM, spinal AVM
family history: a first-degree relative with HHT
What are some of the cutaneous manifestations of diabetes?
Lipoatrophy
Vitiligo
Granuloma annulare
Necrobiosis lipoidica
Pyoderma granulosum
What is pemphigoid gestationis?
Versus what is
polymorphic eruption of pregnancy?
2nd - 3rd trimester of pregnancy
Itchy blistering lesions
Often develop in peri-umbilical region, later spreading to the trunk, back, buttocks and arms
Tx = Oral corticosteroids
3rd trimester
Pruritic lesions
Starts with striae on the abdomen and typically spares the umbilicus
Management depends on severity: emollients, mild potency topical steroids and oral steroids may be used
What is the step up treatment for psoriasis?
potent topical steroids OD + vitamin D analogue OD (at different times, 4 weeks)
step up vitamin D analogue to BD
Potent steroid BD ora coal tar preparation applied once or twice daily
Short-acting dithranol can also be used\
**If it is flexural psoriasis only - then mild to moderate topical steroid and no vit D analogue is the treatment
What is necrobiosis lepoidica?
Shiny, painless areas of yellow/red/brown skin typically on the shin
often associated with surrounding telangiectasia
Seen in diabetes
