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derm Flashcards

1
Q

Treatment of mild to moderate acne

A

12 weeks course in evening
Topical combination therapy of:
1. Adapalene + benzoyl peroxide
2. Benzoyl peroxide + clindamycin
3. Retinoids + clindamycin

Or topical benzoyl peroxide monotherapy

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2
Q

Acne may be classified into mild, moderate or severe. What are the differences

A

(a) Mild - comedones +/- sparse inflammatory lesions
(b) Moderate - widespread non-inflammatory lesions, papules and pustules
(c) Severe - extensive inflammatory lesiobs, nodules, pitting, scarring

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3
Q

target lesions are called

A

erythema multiforme

can be caused by viruses (HSV), NSAIDs, bacteria, penicillin, COCP, lupus, sarcoid, cancers

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4
Q

Pregnancy is a contraindication to which acne treatment

A

Topical and oral retinoid treatment
And oral Abx tetracyclines (use erthromycin)

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4
Q

Seborrhoeic dermatitis - an inflammatory reaction to which pathogen

A

Malassezia furfur

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4
Q

Two large vessel vasculitis

A

Temporal arteritis
Takayasu’s arteritis

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4
Q

Two medium vessel vasculitis

A

Kawasaki disease
Polyarteritis nodosa

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4
Q

Small vessel vasculitis
1. ANCA-associated - 3 types
2. Immune complex small-vessel vasculitis - 4 types

A
  1. ANCA-associated vasculitis
    - Granulomatosis with polyangiitis (Wegener’s)
    - Eosinophilic granulomatosis with polyangiitis (Churg-Strauss)
    - Microscopic polyangiitis
  2. Immune complex small-vessel
    - HSP
    - Goodpasture’s (anti-GBM)
    - Cryoglobulinaemic
    - Hypocomplementic urticarial (anti-C1q)
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4
Q

Treatment of urticaria

A
  1. Non-sedating antihistamines
  2. Oral prednisolone for severe or resistant episodes
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4
Q

Perioral dermatitis should be treated with

A

topical or oral antibiotics

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4
Q

Gram-negative folliculitis may occur as a complication of long-term antibiotic use in acne. What can be used to treat this if this occurs?

A

High dose oral trimethoprim

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5
Q

Seborrhoeic dermatitis (malassezia furfur) treatment for:
(a) scalp
(b) face and body

A

Scalp
1. OTC zinc pyrithione (Head and Shoulders) and tar (Neutrogena T gel).
2. Second line ketoconazole
3. Selenium sulphide + topical steroids

Face + body
1. Topical antifungals - ketoconazole
2. Topical steroids

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5
Q

Treatment of Pityriasis versicolor (Malassezia furfur)

A
  1. Topical antifungal - ketoconazole shampoo
  2. If failure to respond to topical, then oral itraconazole + send scrapings
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5
Q

What is treatment for tinea capis

A
  1. Oral antifungals
    - Terbinafine for trichophyton
    - Giseofulvin for Microsporum
  2. Topical ketoconazole for the first 2 weeks to reduce transmission
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5
Q

Tinea corporis (ringworm) pathogen causes

A

Trichophyton rubrum
Trichophyton verrucosum

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5
Q

Tinea corporis (ringworm) treatment

A

Oral fluconazole

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5
Q

Alopecia areata has localised, well demarcated patches of hair loss. What is the treatment

A
  1. Watch and wait - 50% grows back in 1 year, 80% eventually
  2. Topical or intralesional steroids
  3. Topical minoxidil
  4. Phototherapy
  5. Dithranol
  6. Contact immunotherapy
    + wigs
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5
Q

Microsporum canis (cats + dogs) can cause tinea capis. Under Wood’s lamp, what does Microsporum canis show

A

Green flurescence under Wood’s lamp

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5
Q

Pityriasis versicolor is a superficial cutaneous fungal infection caused by which pathogen

A

Malassezia furfur

same as seborrhoeic dermatitis

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5
Q

tinea capitis affects which part of body

A

scalp

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5
Q

Tinea capis is caused by what 2 fungus

A

Trichophyton tonsurans
Microsporum canis (cats + dogs)

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5
Q

tinea corporis affects which part of body

A

trunk, legs or arms

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5
Q

Two types of contact dermatitis and main differences

A

(a) Irritant - non-allergic, due to weak acids, alkalis. On the hands. Erythema but no crusting and no vesicles
(b) Allergic - type IV hypersensitivity. Often on the head after hair days. Acute weeping eczema on hairline, not scalp. Crusting + vesicles.

Rx: potent steroid

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6
Q

When are escharotomies indicated for burns

A

circumferential full thickness burns to the torso or limbs

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6
Q

orange-red lesions with pinpoint redder spots on the glans and adjacent areas of the foreskin in uncircumcised men

A

Zoon’s balanitis

(circumcision is curative, can also use laser therapy + topical steroids)

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6
Q

tinea pedis affects which part of body

A

feet

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6
Q

broken ‘exclamation mark’ hairs is seen in what condition

A

alopecia areata

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6
Q

Assessing burn depths - what are the main appearances for:
(a) Superficial epidermal - 1st degree
(b) Partial thickness (superficial) - 2nd degree
(c) Partial thickness (deep) - 2nd degree
(d) Full thickness - 3rd degree

A

(a) Red, painful, dry, no blisters
(b) Pink, painful, blisters
(c) White, patches of non-blanching erythema, painful, reduced sensation
(d) White waxy/ brown /black, no blisters, no pain

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6
Q

Rosacea treatment

If there is prominently erythema/flushing

A

Topical brimonidine gel - as required, typically reduces within 30mins

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6
Q

Referral is considered for rosacea if

A
  • Symtoms have not improved in GP
  • Laser therapy may be done for those with teleangectasia
  • Rhinophyma
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6
Q

Rosacea treatment
Topical brimonidine gel is given for redness. What is given for:

Mild to moderate papules and/or pustules

A

Topical ivermectin
Or topical metronidazole or azelaic acid

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6
Q

Are SCCs arising in a chronic scar are typically more or less aggressive?

A

more aggressive
carry an increased risk of metastasis

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6
Q

IV fluids are given to patients with burns of greater than what % total body surface area affected
(a) adults
(b) children

A

(a) adults >15%
(b) children >10%

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6
Q

Course of treatment of oral terbinafine for fungal nail (Trichophyton rubrum) infection

A

6 weeks - 3 months daily

n.b. if Candida infection, then oral itraconazole is recommended 1st line

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6
Q

Treatment options for actinic keratosis

A
  1. Avoid sun
  2. 5-fluorouracil cream for 2-3 weeks +/- topical steroids to help inflammatio
  3. Topical 3% diclofenac
  4. Topical imiquimod
  5. Cryotherapy
  6. Curettage and cautery
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6
Q

4 skin manifestations of SLE

A
  1. Photosensitive butterfly rash
  2. Discoid lupus
  3. Alopecia
  4. Livedo reticularis - net-like rash
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7
Q

Management for hyperhidrosis
(4 steps - TIBS)

A
  1. topical aluminium chloride
  2. botulium toxin
  3. surgery e.g. endoscopic transthoracic sympathectomy
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7
Q

What % diclofenac is used for actonic keratoses

A

3%

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7
Q

Treatment for dematitis herpetiformis

A

dapsone

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7
Q

Which stage of burns are referred to secondary care

A
  • All deep dermal (2nd degree - partial thickness deep), and full-thickness (3rd degree) burns
  • Partial thickness superficial dermal (2nd degree dermal) burns of more than 3% TBSA in adults or 2% in children
  • Inhalation injury
  • Electrical/chemical injury
  • Non-accidental injury
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7
Q

autoimmune blistering disorder
itchy
NO mucosal involvement

A

bullous pemphigoid

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7
Q

Rosacea treatment
Topical brimonidine gel is given for redness. What is given for:

Moderate to severe papules and/or pustules

A

Topical ivermectin AND
Oral doxycycline

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7
Q

Main dermatophyte causative organism for fungal nail infection

A

Trichophyton rubrum

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7
Q

Acute flares of Hidradenitis suppurativa are treated with steroids and flucloxacillin. What is long-term disease treated with

A

Topical clindamycin

Or oral lymecycline or clindamycin and rifampicin

Consider surgical excision of some lumps

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8
Q

Skin biopsy immunofluorescence for bullous pemphigoid shows what at the dermoepidermal junction?

A

IgG and C3

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8
Q

autoimmune blistering disorder
mucosal involvement

A

pemphigus

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9
Q

erythema multiforme (target lesions) are caused by what most commonly

A

herpes simplex virus

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10
Q

Hirsutism is often used to describe androgen-dependent hair growth, what describes androgen-independent growth

A

Hypertrichosis

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11
Q

small blistering rash that arises on the rim of the ears in boys aged 5-14 years old in the spring is called…

A

juvenile spring eruption

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12
Q

if guttate psoriasis covers greater than what % then when should the patient be referred for phototherapy under dermatology

A

> 10%

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13
Q

patients with psoriasis should be screened annually for …?

A

psoriatric arthropathy

using validated screening tool e.g. PEST

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14
Q

What 3 vitamin deficiencies can cause angular cheilosis/stomatitis (crusty corners of mouth)

A

Zinc
Vitamin B2 (riboflavin)
Iron

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15
Q

Psoriasis chronic plaque trunk and limbs management

A
  1. Topical steroid OD + topical vitamin D daily up to 4 weeks
  2. If no improvement after 8 weeks, offer topical vitamin D twice daily
  3. If no improvement, then topical steroid twice daily for up to 4 weeks; or coal tar preparation once or twice daily
  4. Short acting dithranol
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16
Q

facial hirsuitism treatment

A

topical eflornithine

CONTRAINDICATED in pregnancy and breastfeeding

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17
Q

Erythema ab igne caused by

A

infrared radiation

i.e. heat from fireplace

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18
Q

two moderate potency steroids

A

betnovate RD - betamethasone 0.025%
eumovate - clobetasone 0.05%

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19
Q

two potent steroids

A

cutivate - fluticasone 0.05%
betnovate - betamethasone 0.1%

20
Q

a very potent steroid

A

dermovate - clobetasol 0.05%

21
Q

NICE advises that potent topical steroids for psoriasis should not be used continuously on the same site for longer than how many weeks, and how long of a break should there be after

A

Do not use on same site for over 8 weeks
Take a break for at least 4 weeks between courses

VERY potent ones - not for more than 4 weeks, with 4 week break

22
Q

first-line treatment for lichen planus

A

potent topical steroids
benzydamine mouthwash for oral lichen planus
extensive - oral steroids, immunosuppression

23
Q

what aged can kids be started on oral tetracyclines for acne

A

12 or older

24
Q

shin lesions - yellow and waxy in diabetics are called

A

necrobiosis lipoidica diabeticorum

25
Q

for chronic psoriasis, first line is usually vitamin D + topical steroid OD at first. in what regions of the body is just MILD-MOD topical steroid prescribed (without vit D)

A

Scalp
Face
Flexures

For TWO weeks

NOTE THE STEROID IS MILD-MOD POTENCY NOT STRONG.

26
Q

rare psycho-dermatological condition characterised by self-inflicted skin lesions and normal skin punch biopsy

A

dermatitis artefacta

27
Q

pregnant woman with itchy rash around her umbilicus - no blisters

A

Polymorphic eruption of pregnancy

28
Q

pregnant woman with itchy rash around her umbilicus - there are blisters

A

Herpes gestationis

29
Q

Areas of skin - typically axillae, neck and skin folds - become thickened and hyperpigmented in T2DM patients. What is this called

A

Acanthosis nigricans

On the neck, axilla and groin

30
Q

The most significant complication of PUVA therapy for psoriasis is

A

squamous cell carcinoma

31
Q

chronic itch on medial border of scapula - what condition

A

notalgia paraesthetica

32
Q

when can kids with impetigo return to school

A

when lesions are crusted over or 48 hours after treatment starts

33
Q

when can kids with measles or rubella return to school

A

until 4 days after onset of rash

34
Q

venous ulceration is typically seen where

A

above the medial malleolus

35
Q

what investigation is done with venous ulceration (above the medial malleolus)

A

ABPI
Normal values 0.8-1.3

36
Q

Treatment of venous ulceration + peripheral vascular disease

A
  1. compression bandaging (4 layer)
  2. oral pentoxifylline - a vasodilator to improve healing rate
37
Q

Crusted scabies is seen in immunosuppressed i.e. HIV patients. What is the treatment

A

Ivermectin

38
Q

A 34-year-old man presents to his GP with an itchy rash on his genitals and palms. He has also noticed the rash around the site of a recent scar on his forearm. Examination reveals papules with a white-lace pattern on the surface. What is the diagnosis?

A

Lichen planus

Planus
Pruritis
Papular
Polygonal rash on flexor

39
Q

Lichen sclerosis typically shows what sign on what region of elderly women

A

Itchy white spots on vulva

40
Q

Keloid scars are most common on

A

sternum

41
Q

Otitis externa and blepharitis are common complications of which skin condition

A

seborrhoeic dermatitis

42
Q

Pruritus particularly after warm bath
‘Ruddy complexion’
Gout
Peptic ulcer disease

which condition

A

polycthaemia

43
Q

what psych medication can trigger exacerbation of psoriasis

A

lithium

44
Q

Recurrent nosebleeds (epistaxis)
Iron deficiency anaemia
Erythema and red dots on skin/hands

What is the condition

A

Hereditary haemorrhagic telangectasia

i.e. osler weber rendu syndrome
- abnormal blood vessel formations in skin, mucous membranes, lungs, liver, brain

45
Q

4 main diagnostic crtieria of hereditary haemorrhagic telangectasia

A
  1. epistaxis - recurrent nosebleeds
  2. telangectasia - at lips, oral, fingers, nose
  3. visceral lesions - e.g. GI telangectasia (with or without bleeds), lung, hepatic, cerebral AVMs
  4. family history
46
Q

Patients with erythoderma or generalised pustular psoriasis should be referred for dermatology to be seen in what timeframe

A

same day

47
Q

A 17-year-old girl attends your surgery to look at her feet. For the last 3 weeks, her feet show cracking and peeling. The soles of her feet are shiny and glazed but the heel is unaffected. The web spaces between the toes are spared. What is the diagnosis

A

Juvenile plantar dermatosis

  • spares the web spaces. athletes foot. tinea pedis would not spare these.
48
Q

Vitiligo is associated with which 5 conditions

A
  1. Addison’s disease
  2. Type ONE diabetes
  3. Autoimmune thyroid disorders
  4. Pernicious anaemia
  5. Alopecia areata
49
Q

Pemphigus vulgaris is an autoimmune blistering disease with mucosal involvement. There is Nikolsky’s sign - bullae spread and pop with pressure.

What is seen on biopsy?

A

Acantholysis

50
Q

4 nail changes seen in psoriasis arthropathy

A
  1. Pitting
  2. Oncholysis
  3. Subungual hyperkeratosis
  4. Loss of nail
51
Q

What is the preferred method for diagnosing contact dermatitis e.g allergy to nickel

A

Skin patch test

52
Q

What type of allergy is allergic contact dermatitis i.e. to nickel

A

Type IV hypersensitivity

53
Q

Oral isotretinoin should not be used in combination with tetracyclines due to the risk of

A

Benign intracranial hypertension

54
Q

Shingles vaccine is given as a one-off dose for old people at age…

A

70
offered again at 78

55
Q

molluscum contagiosum is caused by which pathogen

A

poxvirus

56
Q

Isoretinoin 6 adverse effects

A
  1. Teratogenicity
  2. Low mood
  3. Dry eyes and lips
  4. Raised TGs
  5. Thin hair
  6. Nosebleeds
57
Q

What is recommended first-line for non‑bullous impetigo (i.e. no fluid filled vesicles, no blisters)

A

Hydrogen peroxide 1%

Two or three times daily for 5 days

58
Q

How does erythromycin affects the P450 system

A

P450 INHIBITOR

59
Q

What type of skin cancer does psoriasis increase the risk of

A

non-melanoma skin cancer

60
Q

What oral antibiotic can be used for acne vulgaris in pregnancy

A

Oral erythromycin

61
Q

photosensitive rash with blistering and skin fragility on the face and dorsal aspect of hands

with hypertrichosis, hyperpigmentation

what is the diagnosis

A

porphyria cutanea tarda

62
Q

niacin deficiency (pellagra) presents with what triad

A

dermatitis
diarrhoea
dementia

63
Q

What is seen in urine in porphyria cutanea tarda?

A

Elevated uroporphyrinogen
Pink fluroscence of urine under Wood’s lamp

Serum iron ferritin levels help to guide therapy also

64
Q

What is the management of porphyria cutanea tarda

A

Chloroquine
Venesection if ferrin >600

65
Q

Erythrasma is a generally asymptomatic, flat, slightly scaly, pink or brown rash usually found in the groin or axillae. What bacteria is overgrown here

A

Corynebacterium minutissimum

66
Q

Erythasma - flat, slightly scaly, pink or brown rash usually found in the groin or axillae.

What is shown with Wood’s light

A

Coral-red fluorescence

67
Q

What is the treatment for erythrasma

A
  1. Topical miconazole or antibacterial
  2. Oral erythromycin for more extensive infection
68
Q

The most appropriate management for this patient with a keloid scar is

A

to refer for intralesional triamcinolone (steroid)

69
Q

What type of vaccine is the shingles vaccine

A

Live-attenuated

Given subcutaneously

70
Q

Grave’s disease
Orange peel shin lesions
Shiny appearance
What is this skin lesion called

A

Pretibial myxoedema

71
Q

One finger tip unit (FTU) for steroids for hands

A

1 FTU = twice area of the flat of an adult hand

72
Q

Scabies treatment (not crusted)

A
  1. Permethrin 5%
    Keep on for 8-12 hours
  2. Malathion 0.5%
    Keep on for 24 hours
    Then wash off

If washed off, then reapply. Reapply treatment 7 days later.

73
Q

Head lice treatment

A

Malathion

74
Q

What two medications are the systemic agents that are used first-line for severe psoriasis

A

Methotrexate
Ciclosporin

75
Q

What type of melanoma can arise in areas not associated with sun exposure e.g. soles of feet and palms

A

Acral lentiginous melanoma

76
Q

What is the most common type of melanoma (70%)

A

Superficial spreading

77
Q

What are the 3 major criteria “change in” diagnostic features of melanoma

A

Change in size
irregular shape
irregular colour

78
Q

How should patients with a rhinophyma secondary to rosacea be treated

A

Refer to dermatology

79
Q

Juvenile spring eruption treatment

A
  1. emollients
  2. potent topical steroids
  3. avoid sun
  4. antihistamines to help itch
80
Q

which emollient is most likely to cause skin irritation

A

aqueous cream

81
Q

Port wine stains can be associated with certain syndromes such as

A

Sturge-Weber syndrome
Klippel-Trenaunay syndrome

82
Q

Port wine stains do not disappear over time. What happens to them

A

Become darker and raised

83
Q

When should acne be referred to dermatology?

A
  1. Acne conglobate - rare severe in men, extensive inflammatoy papules + nodules, cysts on trunk
  2. Nodulo-cystic acne

CONSIDER IF:
- mild to moderate and not responded to 2 courses of treatment
- moderate to severe that has not responded to oral Abx
- severe acne - scarring,
hyperpigmentation, widespread pustules, causing psych distress

84
Q

What psoriasis treatment gives typical brown staining as a side effect

A

dithranol

85
Q

What medication can be used in refractory pain in acute shingles if simple analgesia and neuropathic analgesia do not help

A

Prednisolone

86
Q

Which antifungal is contraindicated in hepatic liver failure

A

Fluconazole

87
Q

How long should co-cyprindiol (Dianette) be used for acne? ue to the increased risk of venous thromboembolism with

A

Due to the increased risk of venous thromboembolism, it should be discontinued 3-4 cycles after acne has cleared and change to COCP

88
Q

Which oral antibiotic for acne can cause irreversible skin hyperpigmentation

A

Minocycline

89
Q

Treatment of moderate to severe acne

A

12 week course of topical combination of:
- adapalene + benzoyl peroxide
- tretinoin + clindamycin
- adapalene + benzoyl peroxide + ORAL Abx (lyme/doxycycline)
- topical azelaic acid + ORAL Abx (lyme/doxycycline)

90
Q

To reduce the risk of antibiotic resistance developing, what 3 treatment options should not be used to treat acne?

A
  1. Monotherapy with topical antibiotic
  2. Monotherapy with oral antibiotic
  3. Combination of topical antibiotic and oral antibiotic
91
Q

strawberry naevus treatment

A

watch and wait - most resolve by 10 years of age
if treatment is needed for visual field obstruction, then propranolol, oral steroids or topical b-blockers (timolol)

92
Q

capillary haemangioma not present at birth but may develop rapidly in the first month of life. what is another name?

A

strawberry naevi

erythematous, raised and multilobed tumours

93
Q

mycoplasma pneumonia causes what type of skin lesions

A

erythema multiforme

target lesions

94
Q

what scoring system is used to assess severity of hirsuitism

A

Ferriman-Gallwey scoring system

95
Q

what is management of hirsuitism

A
  1. weight loss
  2. cosmetic techniques e.g. waxing/bleaching - not on NHS
  3. COCP (Yasmin or Dianette - n.b. dianette has increased VTE)
  4. Facial hirsuitism - topical eflornithine
96
Q

if impetigo first line treatment of hydrogen peroxide cream does not work, what is next step

A

topical fusidic acid

97
Q

Koebner phenomenon is when trauma precipitates new lesions. what conditions does this happen with?

A

psoriasis
vitiligo

98
Q

keratoderma blenorrhagica is typically seen in what condition

A

Reiter’s syndrome

99
Q

two flat vascular birthmarks present from birth

A

salmon patch (stork mark) - common, in nape of neck or forehead or eyelids, self-resolve
port wine stain

100
Q

what antifungal is not prescribed orally due to risk of severe hepatic toxicity

A

oral ketoconazole

101
Q

Treatment of moderate to severe acne

A

12 weeks course of one of:
- Topical adapalene + topical benzoyl peroxide
- topical tretinoin + topical clindamycin
- topical adapalene + topical benzoyl peroxide with oral Abx
- topical azelaic acid with oral Abx

OR can use COCP instead of oral Abx in combination with topical Rx in women

102
Q

Once acne has cleared what is maintenance therapy recommendation

A

Maintenance Rx is not always necessary

If frequent relapse, then can consider fixed combination of topical adapalene and topical benzoyl peroxide (or monotherapy with these or azelaic acid)
Review after 12 weeks

103
Q

If a person is taking oral tretinoin for acne, when should they be reviewed after initiation of treatment

A

1 month after starting - face to face appt

104
Q

2ww referral should be sent if suspicious of melanoma if any of ABCDE criteria, or if the mole scores more than 3 with the 7 point criteria.

What are the 7 point criteria?

A

Major criteria (2 points each)
- change in size
- irregular shape
- irregular colour

Minor criteria (1 point each)
- diameter >7mm
- oozing
- inflammation
- change in sensation

AKT (25 decks)

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