Dr Janakan Natkunarajah (Dr Jana)

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1 Dr Janakan Natkunarajah (Dr Jana)

2

3 Diagnosis

4 Furuncle (Boil) Deep follicular abscess Anti-staph antibiotics Systemic & topical

5 Carbuncle Deep abscess formed in a group of follicles Incise and Drain

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7 Recurrent Abscesses Think PVL

8 Recurrent Skin Abscesses Panton-Valentine Leukocidin (PVL) associated Staph. Aureus Toxin -> kill White blood cells and cause tissue damage Seen in UK since 1950s Genes encoding for PVL found in <2% of Staph Aureus

9 Recurrent Painful Abscesses Swab skin, nose, axillae, perineum Request for PVL testing -> sent to reference Lab

10 PVL Treatment PVL -MSSA Flucloxacillin 500mg QDS or clindamycin 450mg QDS PVL MRSA Rifampicin 300mg BD & doxycycline 100mg BD Rifampicin 300mg BD & fusidic acid 500mg TDS Rifampicin 300mg BD & Trimethoprim 200mg BD

11 PVL Decolonisation Decolonisation until acute infection resolves Contacts undergo decolonisation at same time 5 days Bactroban nasal TDS and Hibiscrub or Triclosan 2% wash

12 Inform Health protection agency Infection in care home/residential home Suspicion of spread in nurseries, schools, universities, gyms Cluster/outbreak suspected Invasive disease suspected

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14 Diagnosis

15 Hot Tub Folliculitis

16 Bacterial infection of hair follicle after exposure to contaminated water (whirl pools, hot tubs) Pseudomonas aeruginosa 48 hours after exposure Resolve in 7-14 days

17 Hot tub Folliculitis Erythematous follicular papules and pustules Intertriginous areas Self limiting infection clears 2-10 days Severe: ciprofloxacin 500mg bd for 7 days

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19 Diagnosis

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21 Tinea Incognito Less scaly More pustular More extensive Less raised margin More irritable

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30 Diagnosis

31 Onset any age No Sex/Race preponderance 30% Positive Family history

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34 Disease severity at presentation is the strongest predictor of long term outcome

35 Ophiasis pattern

36 beard area affected in 30%

37 10% nail involvement:- pitting/ longitudinal ridging

38 14-25% progress to A. totalis/a. Universalis

39 Associations Vitiligo Autoimmune thyroid disease Lupus Erythematosus

40 Treatment No treatment % spontaneous remission in AA of short duration (<1yr) Superpotent Topical Steroids Intralesional Steroids (every 4-6wks) Oral Prednisolone (6 weeks tapering course) Contact Immunotherapy: Diphencyprone Phototherapy

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42 Diagnosis

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44 Diagnosis

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47 Scabies Parasitic Infection of the skin Intensely itchy Sarcoptes scabiei var hominis

48 Pregnant female lay 2-3 eggs per day Larvae emerge after 48-72hrs Tragic life : Male mite mates with female and then dies! Cycle: days Mites live for around 30 days

49 Skin Contact

50 Incubation: 4-6 wks Itching worse at night

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57 12 30 mites adults: immunocompetent adults

58 Treatment: 2 treatments one week apart Baby/Elderly/ Immunosuppressed- include Face/neck

59 Treat all family members/sexual partners!

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61 Post Scabetic Itch Last up to 4-6 weeks

62 Crusted Scabies Immunosuppression - Cancer - HIV - Immunosuppressive drugs - Elderly - Itching is unexpectedly mild! - Up to a million mites on the skin - Oral Ivermectin 200ug/kg (named patient basis) and topical permethrin 5% cream

63

64 Diagnosis

65 Risk factors Trauma Occlusion Water immersion Tinea pedis Immunosuppression

66 90% - dermatophyte- T. rubrum 7% - Yeasts- mainly candida 2-3% Non-dermatophyte moulds- fusarium,

67 Distal and Lateral Distal and lateral nail plate spreads proximally

68 White Superficial 10% of onychomycosis T. interdigitale

69 Proximal Least common Think immunosuppression HIV, DM, PVD

70 Candidal Frequent hand immersion

71 Onychomycosis Terbinafine 250mg OD for 3-6 months Itraconazole 200mg OD for 3 months Toe nail Itraconazole 200mg BD for 7 days 21 day break repeat- 21 day break - repeat

72 Chronic

73 Diagnosis

74 Paronychia Swelling of nail fold Loss of cuticle Pus under inflamed areas Nail can be ridged

75 Diagnosis

76 Treatment Acute antibiotics +/- surgical Chronic antibacterial/antifungal cream +/- orals Steroid cream Avoid predisposing factors ie biting

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78 Diagnosis

79 Salicylic Acid

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82 Diagnosis

83 Pompholyx Eczema Vesicles or bullae Personal or family history of eczema in 50% Potent superpotent topical steroids

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88 Diagnosis

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93 Psoriasis Body sites eg scalp /nail Co-morbidities arthritis & cardiovascular factors Family planning Previous Treatments Topical vs phototherapy vs systemic vs Biologic

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95 Papular urticaria Reaction to insect bites Breakfast Lunch Dinner Pattern

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102 Diagnosis

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104 Why buy a Dermatoscope? Diagnostic accuracy for melanoma is 15.6 times higher compared to the naked eye Sensitivity (% of melanomas correctly diagnosed) was higher for dermoscopy (90%) than eye examination only (71%) 42% reduction in patients referred for a biopsy Benign/malignant ratio Pre dermoscopy 18/1; Post dermoscopy 4/1

105 A Asymmetry B- Borders C- Colour D- Diameter >6 mm

106 Asymmetry- colour or structure Atypical network pattern Blue White structures

107 Benign or Malignant?

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109 Asymmetry

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114 Network Pattern

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119 Blue White Structure

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123 Risk Factors Fair skin, red hair, and blue eyes Intermittent sun exposure Sunburns Tanning beds Freckles and melanocytic nevi Family history of melanoma

124 Prognostic Factors Breslow Mitoses: dermal mitoses per mm 2 Ulceration

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134 Diagnosis

135 BCC is the most frequent skin cancer (80%) BCC is 4x more frequent than SCC Metastases are rare (<1% of cases) Local destruction of tissue

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141 Pigmented BCC Similar to nodular but with black discoloration Melanin deposits Pigmented races Face, trunk, and scalp

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147 Diagnosis

148 Superficial BCC Erythematous scaly plaque Slow growth Asymptomatic Trunk, extremities, face

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152 Diagnosis

153 Morphoeic BCC Resembles scar Asymptomatic and slow growing Ill-defined margins Marked subclinical extension

154 Moh s micrographic surgery

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156 Diagnosis

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159 SCC of the lip. A brown, keratotic, crumbly, ulcerated surface with an infiltrating edge. They can present with pain and may be associated with regional lymphadenopathy

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166 Diagnosis

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168 Diagnosis

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170 Diagnosis

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172 Diagnosis

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174 Diagnosis

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