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  Indian J Med Microbiol
 

Figure 3: Little finger nail of right hand showing longitudinal melanonychia with subungual hyperkeratosis. Hutchison sign is positive (a), Pre-operative dermoscopy (Non-contact, Polarised mode, 50x) showing uniform pattern of melanonychia in color as well as width with micro-hutchinson sign (b), Intra-operative dermoscopy showing uniform linear fines lines of pigmentation of same color and width, parallel to each other and limited to the proximal most part of nail bed and nail matrix (c). Pre-operative dermoscopy showing uniform bands of melanonychia (d), lack of any significant findings on naked eye examination of nail bed and matrix (e), Intra-operative dermoscopy showing very fine light pigmentary lines with parallelism, localized to proximal part of nail bed and matrix (red arrow) (f)

Figure 3: Little finger nail of right hand showing longitudinal melanonychia with subungual hyperkeratosis. Hutchison sign is positive (a), Pre-operative dermoscopy (Non-contact, Polarised mode, 50x) showing uniform pattern of melanonychia in color as well as width with micro-hutchinson sign (b), Intra-operative dermoscopy showing uniform linear fines lines of pigmentation of same color and width, parallel to each other and limited to the proximal most part of nail bed and nail matrix (c). Pre-operative dermoscopy showing uniform bands of melanonychia (d), lack of any significant findings on naked eye examination of nail bed and matrix (e), Intra-operative dermoscopy showing very fine light pigmentary lines with parallelism, localized to proximal part of nail bed and matrix (red arrow) (f)