Antonella Tosti Fredric Brandt Endowed Professor of Dermatology & Cutaneous Surgery
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1 Dermoscopy in the evaluation and treatment of hair loss Antonella Tosti Fredric Brandt Endowed Professor of Dermatology & Cutaneous Surgery
2 DISCLOSURE OF RELATIONSHIPS WITH INDUSTRY Antonella Tosti, MD C024 Dermoscopy in the evaluation and treatment of hair loss DISCLOSURES Taylor&Francis: Royalties Trichoscopyonline: Royalties Fotofinder :Consultant
3 Dermoscopy in the evaluation and treatment of hair loss 1 Scarring versus non scarring alopecia 2 Androgenetic alopecia versus telogen effluvium 3 Inflammatory scalp disorders 4 Selection of optimal biopsy site 5 Establish disease severity and response to treatment
4 1 Scarring versus non scarring alopecia Look for follicular openings Absent : scarring Present : non scarring
5 Scarring alopecias Loss of follicular openings May or may not be associated with inflammatory changes Inflammatory changes indicate disease activity
6 Scarring alopecias Black scalp Loss of follicular openings is not very evident due to the pinpoint white dots.. Yin NC, Tosti A. A systematic approach to Afro-textured hair disorders: dermatoscopy and when to biopsy. Dermatol Clin Apr;32(2)145-51
7 Black scalp Pinpoint white dots Normal scalp Non scarring alopecia Scarring alopecia
8 Black scalp Pinpoint white dots Follicular openings Sweat gland openings Abraham LS, Piñeiro-Maceira J, Duque-Estrada B, Barcaui CB, Sodré CT. Pinpointwhite dots in the scalp: dermoscopic and histopathologic correlation. J Am AcadDermatol Oct;63(4):721 Ardigò M, Torres F, Abraham LS, Piñeiro-Maceira J, Cameli N, Berardesca E,Tosti A. Reflectance confocal microscopy can differentiate dermoscopic white dots of the scalp between sweat gland ducts or follicular infundibulum. Br J Dermatol.2011 May;164(5):
9 Black scalp How can we then assess scarring? Distribution of pinpoint white dots is irregular Presence of white patches
10 Dermoscopy in the diagnosis of scarring alopecia Lichen planopilaris Frontal fibrosing alopecia Discoid lupus erythematosus
11 Lichen Planopilaris Most common cause of cicatricial alopecia Severe scalp itching Multiple irregular areas of scarring alopecia
12 Lichen Planopilaris Diagnostic features Loss of follicular openings Peripilar casts Hair tufting
13 Lichen Planopilaris Peripilar casts White concentric scales surrounding the hair shaft at its emergency Thickness is variable Sign of disease activity
14 Lichen Planopilaris Always use dry dermoscopy to look for casts!! Don t use interface solution!!
15 Lichen Planopilaris Hair tufting Tufts of 2 or more hairs surrounded by a peripilar cast are very typical of LPP.
16 Lichen Planopilaris Presence of few pili torti should always raise the suspicious of a scarring alopecia Pili torti are common both in LPP and FFA
17 Frontal Fibrosing Alopecia Scarring alopecia causing progressive recession of the fronto-temporal hairline Most patients complain of hair loss They might seek attention for the facial papules You will miss the diagnosis if you don t examine the hairline
18 Frontal Fibrosing Alopecia Always use dermoscopy to evaluate the hairline for presence of vellus hair and peripilar casts!
19 Frontal Fibrosing Alopecia Diagnostic features Absence of vellus hairs Peripilar casts Lacarrubba F, Micali G, Tosti A. Absence of vellus hair in the hairline: a videodermatoscopic feature of frontal fibrosing alopecia. Br J Dermatol. 2013Aug;169(2):473-4
20 Frontal Fibrosing Alopecia Other features Loss of follicular openings Scalp erythema Pili torti Broken hairs Black dots
21 Frontal Fibrosing Alopecia Eyebrows Loss of vellus hairs Peripilar casts
22 Frontal Fibrosing Alopecia Hair loss on limbs Thin peripilar casts Miteva M, Camacho I, Romanelli P, Tosti A. Acute hair loss on the limbs in frontal fibrosing alopecia: a clinicopathological study of two cases. Br JDermatol Aug;163(2):426-8.
23 Discoid Lupus Erythematosus Cicatricial alopecia associated with active inflammatory lesions, atrophy and telangiectasia Scalp scaling is often a prominent feature Loss of pigment is commonly seen in black scalp
24 Discoid Lupus Erythematosus Diagnostic features Loss of pinpoint white dots Loss of pigmented network Follicular keratotic plugs Red dots Enlarged branching vessels
25 Discoid lupus erythematosus Absence/reduction of of pinpoint white dots Correlates with involvement of the sweat ducts
26 Discoid Lupus Erythematosus Loss of pigmented network Diagnostic for DLE in the black scalp
27 Discoid Lupus Erythematosus Red dots Active lupus erythematosus 38% of patients with DLE Patients with this pattern might regrow hair
28 Presence of follicular openings Non scarring alopecias Alopecia areata Other diseases causing anagen effluvium Trichotillomania Androgenetic alopecia
29 Alopecia Areata Diagnostic features Yellow dots Exclamation mark hairs Black dots Circle hairs
30 Alopecia Areata Yellow dots Infundibula filled with sebum and keratin.
31 Exclamation mark hair Broken hair with a thick pigmented tip Alopecia Areata
32 2 Androgenetic alopecia versus telogen effluvium Look at the thickness of the hair shafts Hair of different thickness : AGA Uniform hair thickness TE
33 Androgenetic alopecia Diagnostic features Hair diameter diversity More than 6 thin short regrowing hair in the frontal scalp
34 Androgenetic alopecia Hair diameter diversity More than 20%variability is diagnostic for AGA.
35 Telogen effluvium Diagnostic features Absence of variability Short regrowing hair of normal thickness
36 3 Inflammatory scalp disorders Look at vessels Immersion fluid dermoscopy Minimal/low pressure Vessels fade with pressure
37 Inflammatory scalp disorders Look at the vessels! Arborizing vessels : seborrheic dermatitis/contact dermatitis Twisted capillary loops : psoriasis Enlarged tortuous capillaries : connective tissue disorders
38 Inflammatory scalp disorders Arborizing vessels : seborrheic dermatitis/contact dermatitis
39 Inflammatory scalp disorders Red dots/ twisted capillary loops : psoriasis
40 Inflammatory scalp disorders Presence of peripilar casts might suggest LPP Presence of enlarged branching vessels is indicative for DLE
41 4 Selection of optimal biopsy site Dermoscopy guided biopsy Use the dermatoscope to select the biopsy site! Area to select depends on disease Miteva M, Tosti A. Dermoscopy guided scalp biopsy in cicatricial alopecia. J Eur Acad Dermatol Venereol Oct;27(10):
42 Hair disorder Lichen planopilaris Frontal fibrosing alopecia Discoid lupus Optimal site of biopsy showing disease activity Hair with peripilar concentric white scales and/or perifollicular erythema Pathological correlation Hair follicle with lichenoid/inrterface infiltrate and perifollicular fibrosis Folliculitis decalvans 6 or more hairs emerging from the same ostium surrounded by white yellowish scales Compound follicular structure of 6 or more hair follicles surrounded by dense inflammation with/without fibrosis Central centrifugal cicatricial alopecia Discoid lupus One or two hairs emerging together, surrounded by white grey halo Follicular red dots (erythematous polycyclic, concentric structures regularly distributed in and around the follicular ostia) Individual or compound follicles devoid of inner root sheaths and surrounded by concentric fibrosis with/without lichenoid inflammatory infiltrate Widened infundibula plugged by keratin and surrounded by dilated vessels and extravasated erythrocytes Discoid lupus lichen planopilaris Keratotic plugs Dilated infundibula plugged with keratin masses
43 5 Establish short term prognosis and response to treatment Evaluate margin of the patch and apparently normal scalp in alopecia areata Use dermoscopy for follow up during treatment
44 Alopecia Areata Establish short term prognosis Scalp surrounding the patch shows exclamation mark hairs Disease is active and the patch will enlarge
45 Alopecia Areata Establish short term prognosis Apparently normal scalp shows broken hairs, coudability, pseudo-monilethrix Active disease, patient will develop new patches
46 Thank you!
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