Table 1.

Summary of the clinical, epidemiological, and histopathological features of published case reports/case series

	Sex	Age	History of trauma	Clinical Presentation	Histologic Variant
Perrin et al. (2012)	Female (4) Male (1)	17-80	no (3)	Fifth digit, right hand (2) Third digit, right hand (2) First digit, right hand (1) All lesions presented as longitudinal melanonychia	Pigmented (4) Melanocytic (1) Acanthotic type (2) Keratogenous type (2) Papillomatous type (1)
Spaccarelli et al. (2013)	Male	69	no	First digit, right hand Band of xanthonychia obscuring the lunula, splinter hemorrhages. Localized nail plate thickening	Hypopigmented Acanthotic type
Wannat et al. (2014)	Male	40	yes	Second digit, right hand Localized pachyonychia associated with longitudinal melanonychia that simulates a foreign body	Pigmented Keratogenous type
Perrin (2017)	Male	50	no	First digit, left hand Acquired localized longitudinal pachymelanonychia, obscuring the lunula	Germinotropic type