case_images: PMC10978039_01
case_images: Clinical image showing a longitudinal erythematous streak with distal onycholysis.
case_images: cde-2024-0016-0001-538087_F01.jpg
case_images: PMC10978039_01_cde-2024-0016-0001-538087_F01.jpg
case_images: F1
case_images: Clinical examination of the right thumbnail showed a less than 1 mm red line originating in the lunula with onycholysis distally (Fig. 1).
case_images: Dermoscopy showing a clear red line with a rounded distal end.
case_images: cde-2024-0016-0001-538087_F02.jpg
case_images: PMC10978039_01_cde-2024-0016-0001-538087_F02.jpg
case_images: F2
case_images: Dermoscopy showed the red line more clearly with rounding of the proximal end (Fig. 2).
case_images: The sample is one of the nail bed epithelium and subjacent corium with adjacent skin represented by hyponychium presumably (H&E, x100 (a)). A small amount of nail bed sampled shows an epithelial morphology that is reminiscent of matrical epithelium, given the presence of elongated rete ridges. The subjacent corium has an elastotic appearance (H&E, x400 (b)). There is a small collection of nerves surrounded by mucin, suggestive of a traumatic neuroma (H&E, x200 (c), x400 (d)).
case_images: cde-2024-0016-0001-538087_F03.jpg
case_images: PMC10978039_01_cde-2024-0016-0001-538087_F03.jpg
case_images: F3
case_images: Dermatopathology of the specimen was consistent with onychopapilloma with a concomitant traumatic neuroma (Fig. 3), indicated by matrical metaplasia of the nail bed epithelium with the presence of a small collection of nerves surrounded by mucin.