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  Indian J Med Microbiol
 

Figure 1: (a) Longitudinal xantholeucopachyonychia with splinter hemorrhages over the right thumbnail. (b) The spheres of prekeratogenous cells and eosinophilic keratogenous cells located in the acanthotic basaloid compartment (arrows; ×100). (c) Note the prekeratogenous zone (arrow) and eosinophilic keratogenous zone (arrowhead; ×200). (d and e) A longitudinal yellowish streak with a column of thickened subungual keratosis on the left thumb. (f and g) A band-form subungual tumor attached on the avulsed nail plate was originated from the distal nail matrix (arrows). (h) A digitated, papillary subungual tumor composed of basaloid matrical epithelium and prominently thickened prekeratogenous and keratogenous zones. Note melanin deposition in the keratinized zones and NP (asterisks;×100). (i) The excised distal nail matrix tumor showed thin papillary structures lined by acanthotic matrical epithelium (H and E, ×200). NP: Nail plate

Figure 1: (a) Longitudinal xantholeucopachyonychia with splinter hemorrhages over the right thumbnail. (b) The spheres of prekeratogenous cells and eosinophilic keratogenous cells located in the acanthotic basaloid compartment (arrows; ×100). (c) Note the prekeratogenous zone (arrow) and eosinophilic keratogenous zone (arrowhead; ×200). (d and e) A longitudinal yellowish streak with a column of thickened subungual keratosis on the left thumb. (f and g) A band-form subungual tumor attached on the avulsed nail plate was originated from the distal nail matrix (arrows). (h) A digitated, papillary subungual tumor composed of basaloid matrical epithelium and prominently thickened prekeratogenous and keratogenous zones. Note melanin deposition in the keratinized zones and NP (asterisks;×100). (i) The excised distal nail matrix tumor showed thin papillary structures lined by acanthotic matrical epithelium (H and E, ×200). NP: Nail plate