2derm Flashcards
cause of spider naevi
COCP
keloid scars are most common on
sternum
A 19-year-old woman attends for review. She has taken lymecycline 408 mg daily and adapalene gel for 5 months for moderate acne, with good response. Examination shows a few inflammatory papules on the cheeks without nodules or scarring.
What is the most appropriate next step?
Stop antibiotics and continue adapalene, review in 1 month
Acne vulgaris: antibiotics (topical or oral) should only be used for more than 6 months in exceptional circumstances
ABPI values
Investigations
ankle-brachial pressure index (ABPI) is important in non-healing ulcers to assess for poor arterial flow which could impair healing
a ‘normal’ ABPI may be regarded as between 0.9 - 1.2. Values below 0.9 indicate arterial disease. Interestingly, values above 1.3 may also indicate arterial disease, in the form of false-negative results secondary to arterial calcification (e.g. In diabetics)
A 27-year-old man presents to the emergency department with a 2-day history of fever, tiredness, and a tingling sensation in the lateral aspect of his right thigh. He has found the tingling was initially bearable but has become painful in the past 24 hours. On examination, the area described is erythematous with a macular rash appearing. His only past medical history is HIV for which he takes anti-retroviral therapy and has an undetectable viral load. He denies any cough, coryzal symptoms, focal neurological signs, or trauma to the site.
Considering the likely diagnosis, what is the appropriate management for the patient out of the options listed?
aciclovir
The majority of patients with suspected shingles should be treated with antivirals within 72 hours of onset
rule of burn SA
Wallace’s Rule of Nine: Each of the following is 9% of the body when calculating surface area % if a burn:
Head + neck, each arm, each anterior part of leg, each posterior part of leg, anterior chest, posterior chest, anterior abdomen, posterior abdomen
A 32-year-old woman who is currently 28 weeks pregnant attends her GP practice with ‘bad skin’. When she enters the room you notice several open and closed comedones on her face, and upon further examination, there are further pustular lesions on her back and chest. She had attended 4 weeks earlier with the same complaint and had been started on topical benzoyl peroxide by one of your colleagues.
The patient has a history of acne vulgaris in her teens, treated with isotretinoin.
Which is the most appropriate treatment to add?
oral erythromycin
sore throat and psoriasis connection
Streptococcal throat infection may precipitate psoriasis (particularly guttate psoriasis). Patients with frequent exacerbations of guttate psoriasis due to streptococcal throat infections may benefit from tonsillectomy
Dermatophyte nail infections -
Dermatophyte nail infections - use oral terbinafine
