Skin Cancer A Personal Approach. Dr Matthew Strack Dunedin New Zealand

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1 Skin Cancer A Personal Approach Dr Matthew Strack Dunedin New Zealand

2 Outline Dermoscopy Instruments and setup Photochemosurgery Clinical Aim: Leave with 2-3 ideas

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5 JLE

6 Benign Junctional Nevus

7 Management Resect Reassure Refer Rebook

8 My struggle with Dermoscopy The Scream Edvard Munch 1895

9 Terms Dermatoscopy Epiluminescent Microscopy Skin Surface Microscopy Dermoscopy

10 Dermoscopy - Brilliant for: Small Angiomas Seborrhoeic Keratosies

11 Dermatologists: In total, 4691 lesions were examined. The overall mean NNT was 6.3, with a range of for each of nine consultant dermatologists. The mean NNT was 7.6 for female and 4.8 for male patients. Clin Exp Dermatol Jan;37(1):6-9. doi: /j x. Epub 2011 Oct 7. The number of benign moles excised for each malignant melanoma: the number needed to treat. Sidhu S, Bodger O, Williams N, Roberts DL.

12 Benign Nevus: Melanoma Excision Ratios by Time NSCS = Non Specialized Skin Clinic SCS = Specialized Skin Clinic Accuracy in melanoma detection: A 10-year multicenter survey Giuseppe Argenziano, MD et al, Journal of the American academy of Dermatology,

13 General Practice, New Zealand All excisions, semirural practice, 3 year period B Wood, NZFP, 2006;v6, n4, pp256-8

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26 jrm

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28 Melanoma in situ

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31 Dysplastic nevus

32 92y M

33 Biopsies Lower: Pigmented Keratosis Upper: BCC

34 Algorithms You see but you do not observe

35 ABCD rule Stolz method Criteria Asymmetry In perpendicular axes: contour, colours and structures Borders 8 segments: abrupt ending of pigment pattern Colours White, red, light-brown (tan), dark-brown, blue-grey, black Score X Factor = Results Differential structural components Total score Benign <4.76 Suspicious Melanoma >5.45

36 Blum's modified ABC-point list A B C D E lesion asymmetry of outer shape or differential structures inside the in at least 1 axis the abrupt cutoff of network at the border in at least one quarter of circumference 3 or more colors 3 or more differential structures noticed change (evolution) in the last 3 months

37 Menzies method Negative features (benign lesions): Symmetrical pattern (colours, structure) Single colour Positive features (melanoma): Blue-white veil Multiple brown dots Pseudopods Radial streaming Scar-like depigmentation Multiple (5-6) colours Multiple blue/grey dots Broadened network

38 Seven-point rule Three or more indicates melanoma Atypical pigment network (2) Blue-whitish veil (2) Atypical vascular pattern (2) Irregular streaks (1) Irregular dots/globules (1) Irregular blotches (1) Regression structures (1)

39 ABCD

40 Did you look twice?

41 More Cases

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55 RMS

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57 jcd

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59 HB

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61 PJM

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64 MAP

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66 Pigmented Lesion Assessment

67 Pigmented Lesion Assessment

68 The Dance of Life Aasgardstrand

69 1:5-10

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72 Lesion was benign Seborrhoeic Keratosis

73 91y M

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75 Melanoma In-Situ 0.6mm Diagnosis

76 73y M My Diagnosis: Seborrhoeic Keratosis Benign Solar Lentigo

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78 Instruments

79 Blades

80 Sutures Ask for free samples!

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82 Curettage Relies on physical differences between affected and normal tissue Diathermy - hemostasis Useful for BCC Histology will report incomplete removal

83 Lighting

84 Eyewear Try before you buy!

85 Local Anaesthetic 2.2ml cartridge 27g 22g 18g

86 Most important things: Use enough Time Reassurance

87 Photography

88 Consent Lighting System

89 Examinaton

90 Examination

91 Photochemosurgery for Basal Cell Carcinoma

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93 Photodynamic Therapy

94 d

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97 BCC, pre Photochemosurgery

98 Post Photochemosurgery

99 Basal Cell Carcinoma Commonest Skin Cancer Rarely Life Threatening Treatment ranges from easy to very challenging Many treatment options

100 Treatment Options Surgery Excison Curetage Mohs Radiotherapy Photochemosurgery (Photodynamic Therapy) Topical No Treatment rare

101 Waxy with capillaries

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104 BCC

105 BCC post Imiquimod

106 Bowen s Disease Squamous Cell Carcinoma in Situ Prognosis unclear? 10% progress to SCC Main Treatment Options: Cryotherapy Topical 5 Flourouracil Scaring may be due to lesion not treatment

107 Post 5FU

108 Cutaneous Horn?Cause Often Painful

109 What I think of:

110 What s Under a Cutaneous Horn Solar Keratosis Basal Cell Carcinoma Squamous Cell Carcinoma This Case Nonspecific Change

111 BCC

112 Subungual Pigmented Lesions

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114 Lab Write brief details of history Diagnosis Differential Diagnosis Consider ringing pathologist Consider second opinion

115 Trapdoor Problem with a Flap 94y F, result painful and not happy with appearance

116 Squamous Cell Carcionma

117 84y F Summer Winter

118 Actinic Chelitis High risk for SCC Topical treatment OK Follow up mandatory

119 94y M, confused

120 66y M, change over 2 months

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122 Wart, present 6/12

123 Wart GP x1 first seen >1y ago Nurse x2 Podiatrist x1

124 Take Home Messages #1 Have equipment you enjoy using Get chaperone consent in writing When in doubt refer but you can sometimes reassess Biopsies are your friend If you don t have loupes get some on loan Have your eyes checked

125 Take Home Messages #2 Consider Polarizing Dermoscope Printed Handouts Last Point: call me Follow up Surgery incl Sutures Cryotherapy

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