Malignant non-melanocytic lesions
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1 Malignant non-melanocytic lesions Course C023: Fundamentals of Dermoscopy March 4, 2019, 11:20 AM - 11:50 PM Room: 146B Jason B. Lee, MD Professor & Vice Chair Director of Dermatopathology & Pigmented Lesion Clinic Department of Dermatology and Cutaneous Biology Thomas Jefferson University
2 DISCLOSURE OF RELATIONSHIPS WITH INDUSTRY Jason B. Lee, MD Course C023: Fundamentals of Dermoscopy March 4, 2019, 11:20 AM - 11:50 PM Room: 146B DISCLOSURES I do not have any relevant relationships with industry.
3 Malignant Non-Melanocytic Lesions 1. Basal-cell carcinoma non-pigmented & pigmented 2. Solar (Actinic) Keratosis non-pigmented & pigmented 3. Squamous-cell carcinoma in-situ (Bowen s disease) 4. Keratoacanthoma/Squamous-cell carcinoma
4 Basal-Cell Carcinoma (BCC)
5 Non-Pigmented Basal-Cell Carcinoma Dermatoscopic features (semi) translucency white structures (crystalline, rosette, dot, strand, blotch) prominent vessels arborizing vessels short fine vessels shallow ulcers white to pink to reddish background = Non-Pigmented Basal-Cell Carcinoma
6 Nodular Basal-Cell Carcinoma (Semi)-translucency more prominent Larger caliber vessel
7 Nodular Basal-Cell Carcinoma
8 telangiectasia white streaks ulceration translucency pink to reddish background
9 Nodular BCC
10 Nodular BCC
11 Nodular BCC
12 white dot Though crystalline structures are the best known white structure associated with BCC, other white structures are also observed
13 Nodular BCC
14 Nodular BCC
15 Nodular BCC
16
17 Short fine vessels of BCC Background telangiectasia BCC change in vascular pattern from the background vasculature change is skin color, appearing semi-translucent
18 Superficial Basal-Cell Carcinoma (Semi)-translucency less prominent Smaller caliber vessel White structures more prominent White streaks crystalline structures White rosettes (clover) White dots White structureless areas/blotches
19 Superficial BCC Crystalline structures orthogonal bright white streaks visualized under polarized dermatoscopy Small vessels Small ulcerations Pink red background
20 ulceration white streaks Superficial BCC
21 Superficial BCC
22 Superficial BCC
23 No dermatoscopic structures are pathognomonic Dermatoscopic structures need to be interpreted in the context of the patient Given the dermatoscopic findings associated with BCC, the pretest probability of BCC is much higher in patients with significant photodamage, history of skin cancer, Fitzpatrick skin phototype I & II, etc.
24 Dermatoscopic simulators of BCC Adnexal neoplasms Lichen planus-like keratosis Scar Dermatofibroma Melanocytic nevus Solar (actinic) keratosis Melanocytic nevus Melanoma Hemangioma Ruptured cyst/folliculitis
25 BCC Palisaded Encapsulated Neuroma
26 Scar BCC
27 Scar prominent vascularity pink white background
28 In non-referral centers, it s impact on non-melanocytic lesions was more dramatic Sensitivity for non-melanocytic lesions 98.6% for basal cell carcinoma 86.5% for pigmented squamous cell ca 79.3% melanoma 10% LPLK (90.5% false+) Rosendahl C et al. J Acad Dermatol 2010;62:
29 Lichen Planus-Like Keratosis (LPLK) Dermatoscopic findings Pigmented granules Variable pink to light brown background color Look for remnant of a solar lentigo Lacks ulcer and characteristic BCC vascular pattern
30 Lichen Planus-Like Keratosis
31 LPLK pigmented granules pink to light brown background surface scale
32 sbcc LPLK Fine vessels
33 Dermatoscopic simulators of BCC Adnexal neoplasms Lichen planus-like keratosis Scar Dermatofibroma Melanocytic nevus Solar (actinic) keratosis Melanocytic nevus Melanoma Hemangioma Ruptured cyst/folliculitis
34 Pigmented Basal-Cell Carcinoma Dermatoscopic features (semi) translucency white structures(crystalline, rosette, dot, strand, blotch) prominent vessels Non-Pigmented arborizing vessels = short fine vessels Basal-Cell Carcinoma shallow ulcers white to pink to reddish background + Pigmented Islands blue-gray nests blue-gray globules = Pigmented Basal-Cell Carcinoma
35 Pigmented Basal-Cell Carcinoma Dermatoscopic features Frequency 1. large blue-gray ovoid nests 55% 2. arborizing treelike vessels 52% 3. multiple blue-gray globules 27% 4. ulceration 27% 5. maple leaf-like areas 17% 6. spoke wheel-like structures 10% Menzies SW. Dermoscopy of pigmented basal-cell carcinoma. Clinics in Dermatology 2002;20:268 9.
36 Pigmented Basal-Cell Carcinoma Dermatoscopic features Frequency 1. large blue-gray ovoid nests 55% 2 arborizing treelike vessels 52% 3 multiple blue-gray globules 27% 4 ulceration 27% 5. maple leaf-like areas 17% 6. spoke wheel-like structures 10% Menzies SW. Dermoscopy of pigmented basal-cell carcinoma. Clinics in Dermatology 2002;20:268 9.
37 Large blue-gray ovoid nest
38 Blue-gray globules
39 Pigmented Nodular & Superficial BCC ulceration translucent area + telangiectasia pigmented islands
40 pigmented islands translucent area + telangiectasia Pigmented Nodular BCC
41 Pigmented Nodular BCC
42 Spoke wheel-like areas Pigmented basal-cell carcinoma. Chapter 6a. Polsky D. page 58 in Atlas of dermoscopy. Ed Marghoob et al. Taylor & Francis. United Kingdom. 2006
43 Pigmented Nodular BCC
44 Submerged leaf-like areas
45 translucent area + telangiectasia ulceration pigmented islands Pigmented Nodular BCC
46 Pinkus BCC Dermatoscopic Findings white-network sharp circumscription polymorphous vascular pattern hairpin loops curvilinear comedo-like opening pink background with patchy pigmentation
47
48 Malignant Non-Melanocytic Lesions 1. Basal-cell carcinoma non-pigmented & pigmented 2. Solar (Actinic) Keratosis non-pigmented & pigmented 3. Squamous-cell carcinoma in-situ (Bowen s disease) 4. Keratoacanthoma/Squamous-cell carcinoma
49 Solar (Actinic) Keratosis red (pseudo) network keratotic surface scale
50 Solar (Actinic) Keratosis red network surface scale small white circles (halo, targetoid) white rosettes (4 leaf clover) Lee JH, Won CY, Kim GM, Kim SY. Dermoscopic features of actinic keratosis and follow up with dermoscopy: a pilot study. J Dermatol Jun;41(6):
51 2016 JEADV N=63 of 6108 (1%) showed rosettes Smaller rosettes were found to be caused by polarizing horny material in adnexal openings. Larger rosettes were found to be caused by perifollicular fibrosis. Rosettes observed in BCC SCC DF Nevus Melanoma Molluscum Dilated pore [Solar (actinic) keratosis]
52 Haspeslagh, M. et al. Rosettes and Other White Shiny Structures in Polarized Dermoscopy: Histological Correlate and Optical Explanation. JEADV 30.2 (2016):
53
54
55
56 white rosette
57 J Am Acad Dermatol 2013;68: Collision: solar keratosis and solar lentigo Dermatoscopic features solar (actinic) keratosis solar lentigo (most common)
58 Pigmented Solar (Actinic) Keratosis
59 On the right, note the red and brown network accompanied by keratotic scale. As a collision lesion, the proportion of the red and brown network will depend on the proportion of the 2 (or in some cases 3) lesions that make up the pigmented solar keratosis.
60 Pigmented Solar (Actinic) Keratosis
61 Pigmented Solar (Actinic) Keratosis white rosettes
62 Pigmented Solar (actinic) keratosis
63 Pigmented Solar (actinic) keratosis white circles white rosette
64 Pigmented AK vs Lentigo Maligna Akay et al. BJD 2010; 163: 1213 Conclusion: All the dermatoscopic structures observed in MIS may be also observed in pigmented actinic keratosis, except for black blotches There is significant overlap of dermatoscopic features between a pigmented solar (actinic) keratosis and MIS on the face. If in doubt, biopsy
65 Malignant Non-Melanocytic Lesions 1. Basal-cell carcinoma non-pigmented & pigmented 2. Solar (Actinic) Keratosis non-pigmented & pigmented 3. Squamous-cell carcinoma in-situ (Bowen s disease) 4. Keratoacanthoma/Squamous-cell carcinoma
66 Bowen s Disease Dermatoscopic findings coiled (glomerular) > dotted vessels surface scale pink to red background
67 Vascular Patterns Pan Y et al. JAAD 2008
68 Common Vascular Structures arborizing vessels: basal-cell carcinoma hairpin vessels: seborrheic keratosis dotted vessels: melanocytic neoplasms, psoriasis, porokeratosis, Bowen disease coiled vessels (glomerular): Bowen disease If one is relying on a dermatoscope with only a 10x magnification, the smaller caliber vessels are difficult to evaluate.
69 dotted vessels coiled (glomerular) vessels J Am Acad Dermatol 2010;63:361-74
70 Bowen Disease dotted vessels surface scale
71
72 Bowen s Disease dotted vessels surface scale ulceration 10x 10x
73 Bowen s Disease 20x 20x dotted vessels (20x mag)
74 Bowen s Disease
75 Coiled Vessels of Bowen s Disease
76 Psoriasiform Keratosis
77 Psoriasis
78 Bowen s Disease Dotted and coiled vessels may be seen in other diseases 1. Psoriasis: regularly dotted vessels 2. Psoriasiform keratosis: regularly dotted vessels 3. Pale-cell acanthoma: regularly dotted vessels sometimes in linearly dotted pattern ( pearls in a line ) 4. Porokeratosis: dotted vessels
79 Dermatoscopic findings surface scale coiled (glomerular) > dotted vessels pink to red background Bowen s Disease
80 Malignant Non-Melanocytic Lesions 1. Basal-cell carcinoma non-pigmented & pigmented 2. Solar (Actinic) Keratosis non-pigmented & pigmented 3. Squamous-cell carcinoma in-situ (Bowen s disease) 4. Keratoacanthoma/Squamous-cell carcinoma
81 Keratoacanthoma white circles coiled vessels keratin blood spots Rosendahl C et al. Dermatol. 2012;148(12):
82 Keratoacanthoma white circles coiled vessels keratin Blood spots
83 Key to Success Correctly interpret the observed structures Look for presence and absence of dermatoscopic structures Do not rely on any one dermatoscopic finding Clinical context is important Look at all lesions
84 The End
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