Dermatology Flashcards
What is Lichen nitidus
rare skin condition
Appears as tiny, skin-colored, glistening bumps on the skin surface
Results from abnormal inflammatory activity
Cause is unknown
Aetiology of Lichen planus
chronic inflammatory disorder
affects skin / genital / oral mucous membranes
Unknown pathogenesis
Symptoms of vulval Lichen planus
Itch/irritation soreness dyspareunia urinary symptoms vaginal discharge Can be asymptomatic
Signs of vulval lichen planus
1) Classical = papules on the keratinised anogenital skin
+/- striae on the inner aspect of the vulva Hyperpigmentation
2) Hypertrophic = Thickened warty plaques - perineum / perianal areas - may become ulcerated / infected/ painful. Can mimic malignancy
3) Erosive = most common subtype to cause vulval symptoms.
mucosal surfaces eroded
Wickham’s striae
Can lead to scarring and complete stenosis
There may be loss of vulvar architecture.
Small risk of squamous cell carcinoma developing in women with lichen planus (< 3%).
Complications of vulval lichen planus
Scarring
vaginal synaechia
Development of SCC (up to 3%)
Diagnosis of vulval lichen planus
clinical appearance
vulval biopsy
Biopsy is a necessity if diagnosis is uncertain or coexistent VIN/SCC suspected
What investigations should be performed as part of management of vulval lichen planus
Investigate for autoimmune disease - esp thyroid
Skin swab - exclude secondary infection - esp excoriated lesions
Patch testing - if contact dermatitis suspected
Biopsy - if diagnosis uncertain / VIN or SCC suspected
Treatment of vulval lichen planus
Inform of small risk of neoplastic change
Ultra-potent topical steroids, e.g. Clobetasol
+/- Maintenance treatment with weaker steroid / less frequent potent steroids
Vaginal corticosteroids: hydrocortisone PV(Colifoam) / Prednisolone suppositories for more severe cases
An ultra-potent topical steroid with antibacterial and antifungal, e.g. Dermovate NN - short term to clear secondary infection
When is onward referral recommended for vulval lichen planus
Refer to a multidisciplinary vulval clinic if
- erosive disease
- recalcitrant cases
- those in whom systemic therapy is considered
Systemic treatment options for lichen planus
no consensus Oral ciclosporin retinoids oral steroids new biological agents m
supervised by a dermatologist in the context of a specialised clinic
Follow-up of patients with vulval lichen planus
review at 2–3 months
assess response to treatment
Stable disease should be reviewed annually - can be with GP
Erosive lichen planus needs long-term specialised follow-up
Aetiology of vulval eczema
Atopic = the ‘allergic’ type - often seen in people who also have hay fever or asthma
Allergic contact = skin contact to a substance to which the individual is sensitive
Irritant contact = skin contact with irritating chemicals, powders, cleaning agents, etc
symptoms of vulval eczema
Vulval itch and soreness
Signs of vulval eczema
Erythema Lichenification Excoriation Fissuring Pallor or hyperpigmentation
Complications of vulval eczema
Secondary infection.
Follow up for vulval eczema
As clinically required
psychological support may be needed
Diagnosis of vulval eczema
Clinical presentation.
General examination of the skin
+/- biopsy if diagnosis uncertain
further investigations of suspected of vulval eczema
Patch testing
Biopsy – only if atypical features (e.g. asymmetric, localised or eroded) or failure to respond to treatment
Treatment of vulval eczema
Avoid precipitating factor(s)
Use of emollient soap substitute
Topical corticosteroid – preparation depending on severity - 1% Hydrocortisone or betamethasone 0.025% or clobetasol 0.05%
Combined preparation - antifungal and/or antibiotic may be required for short-term use
Aetiology of vulval lichen simplex
A response to the skin being repeatedly scratched or rubbed over a long period of time
Symptoms of vulval lichen simplex
Vulval itch and soreness
investigation of suspected vulval lichen simplex
Biopsy - if diagnosis uncertain
Screening for infection (e.g. Staphylococcus aureus, Candida albicans)
Dermatological referral for consideration of patch testing –
Ferritin
Treatment of vulval lichen simplex
Avoid of precipitating factor(s)
Use emollient
Use soap substitute
Topical corticosteroid – potent steroids are required when treating lichenified areas, e.g. betamethasone or clobetasol
Combined preparation - antifungal and/or antibiotic may be required if secondary infection suspected
A graduated reduction in frequency of application of topical steroid helpful, over 3–4 months
Mildly anxiolytic antihistamine such as hydroxyzine or doxepin at night is helpful.
CBT may be helpful if co-existing mental health issues
Causes of lichen simplex
- Underlying dermatoses, i.e. atopic dermatitis, allergic contact dermatitis, superficial fungal (tinea and candidiasis) infections.
- Systemic conditions causing pruritus, i.e. renal failure, obstructive biliary disease, Hodgkin’s lymphoma, hyper- or hypothyroidism and polycythaemia rubra vera.
- Environmental factors: heat, sweat, rubbing of clothing and other irritants
- Psychiatric disorders: anxiety, depression, obsessive compulsive disorder and dissociative experiences
Appearance of vulval lichen simplex
Localised plaque of chronic eczematous inflammation
Lichenification / leathery appearance
Erosions and fissuring
Excoriations
Pubic hair may be lost in the area of scratching
or skin may be pale and wrinkled.
There may be labial swelling and erythema
Complications of vulval lichen simplex
Secondary infection.
Follow up for patients with vulval lichen simplex
Mild disease – follow up as clinically required. Severe disease (i.e. when using potent topical steroids) – review at one month then as required
Aetiology of psoriasis
chronic inflammatory epidermal skin disease
Affects ~ 2% of general pop.
Genital psoriasis may present as part of plaque or flexural psoriasis
Symptoms of Genital psoriasis
vulval itch
soreness
burning sensation
Signs of Genital psoriasis
Well-demarcated brightly erythematous plaques
Often symmetrical
Frequently affects natal cleft
Usually lacks scaling due to maceration.
Fissuring.
Involvement of other sites, e.g. scalp, umbilicus
Complications of Genital psoriasis
May be worsened due to Koebner effect by irritation from urine, tight-fitting clothes or sexual intercourse
Diagnosis of Genital psoriasis
Clinical presentation.
General examination of the skin and nails to look for other signs of psoriasis
Further investigation of Genital psoriasis
Skin punch biopsy if the diagnosis is in doubt.
Treatment of Genital psoriasis
Avoid irritating factors.
Use of emollient soap substitute.
Topical corticosteroid – weak to moderate steroids preferred - if insufficient then intensive short-term potent steroids
Combined preparation with antifungal and/or antibiotic may be required if secondary infection suspected
Weak coal-tar preparations – used alone / combined / alternated with topical steroids.
Vitamin D analogues such as Talcalcitol – alone / combination with corticosteroid
When is onward referral recommended for genital psoriasis
If unresponsive to treatment
those in whom systemic therapy is considered
Systemic treatments: if required for severe and extensive psoriasis may help genital lesions but not recommended for isolated genital psoriasis
Follow up for genital psoriasis
Mild disease – follow up as clinically required. Severe disease (i.e. when using potent topical steroids) – review at one month then as required
Aetiology of Vulval intrapeithelial neoplasia (VIN)
vulval pre-cancerous skin condition
May become cancerous if left untreated.
defined as low grade or high grade
Symptoms of Vulval intrapeithelial neoplasia (VIN)
lumps erosions burning itch/irritation pain may be asymptomatic
2 types of Vulval intrapeithelial neoplasia (VIN)
Low-grade change - usually associated with HPV and may resolve
High-grade change - generally not HPV related - occurs in conjunction with lichen sclerosis or lichen planus
Known as differentiated type
much greater risk of progression to SCC
Diagnosis of Vulval intrapeithelial neoplasia (VIN)
histological diagnosis - biopsy
Signs of Vulval intrapeithelial neoplasia (VIN)
Clinical appearance is very variable
Raised white / erythematous / pigmented lesions
May be warty / moist / eroded
Multifocal lesions are common
Complications of Vulval intrapeithelial neoplasia (VIN)
Development of SCC
Recurrence common - progression to cancer can occur following previous treatment.
Psychosexual consequences
Diagnosis of Vulval intrapeithelial neoplasia (VIN)
Biopsy.
Multiple biopsies may be required as there is a risk of missing invasive disease.
Further investigations when Managing Vulval intrapeithelial neoplasia (VIN)
Ensure cervical cytology remains up-to-date – association with cervical intraepithelial neoplasia (CIN)
Refer for colposcopy to exclude CIN
For perianal lesions - referral for anoscopy is recommended
treatment of Vulval intrapeithelial neoplasia (VIN)
Local excision
Imiquimod cream 5% (not licensed in pregnancy) - unlicensed indication
Vulvectomy - Recurrence may occur, function + cosmesis will be impaired
Supervision – some lesions spontaneously regress, risk of progression
Local destruction - variety of techniques - carbon dioxide laser / ultrasonic surgical aspiration / photodynamic therapy /cryotherapy / laser - recurrence rates higher than for excision
Onward referral pathway for suspected or confirmed VIN
multidisciplinary vulval clinic
or input from gynaecology regarding assessment for surgical excision
Follow-up for Vulval intrapeithelial neoplasia (VIN)
Close follow-up is mandatory
Although resolution may occur VIN III has a significant rate of progression
biopsy features of lichen sclerosis
Initially a thickened epidermis
becomes atrophic with follicular hyperkeratosis
a band of dermal hyalinisation
with loss of the elastin fibres
perivascular lymphocytic infiltrate