Research Article
Clinical Clues to Differentiate between Dermatophyte Onychomycosis (DP-OM) and Dermatophytoma-Like Traumatic Onychodystrophy (DP-TO)
Table 1
Comparison of nail, surrounding tissue, and foot features of dermatophytoma onychomycosis and dermatophytoma-like traumatic onychodystrophy.
| | Characteristic | Number (%) | | Dermatophytoma onychomycosis
() | Dermatophytoma-like traumatic onychodystrophy () | value |
| | Nail finding | | | | | Nail thickness; mm () | | | 1.000 | | Depth of nail involvement | | | 0.597 | | Less than 1/3 | 2 (15.4) | 3 (13.0) | | 1/3–2/3 | 9 (69.2) | 19 (82.6) | | >2/3 | 2 (15.4) | 1 (4.3) | | Location of dermatophytoma lesions | | | 0.008 | | Center | 1 (7.7) | 12 (52.2) | | Lateral | 12 (92.3) | 11 (47.8) | | Splinter hemorrhage | 0 (0) | 2 (8.7) | 0.525 | | Discoloration | 13 (100) | 23 (100) | — | | Yellow | 6 (46.2) | 5 (21.7) | 0.127 | | Brown to black | 2 (15.4) | 8 (34.8) | 0.212 | | White | 11 (84.6) | 21 (91.3) | 0.609 | | Green | 2 (15.4) | 1 (4.3) | 0.250 | | Surrounding nail tissue | | | | | Toe tip callus | 0 (0) | 4 (17.4) | 0.274 | | Onychophosis | 6 (46.2) | 11 (47.8) | 0.923 | | Ipsilateral foot with dermatophytoma nail lesions | | | | | Foot deformity | 5 (38.5) | 5 (21.7) | 0.282 | | Hallux vulgus | 4 (30.8) | 4 (17.4) | 0.354 | | Claw toe | 1 (7.7) | 1 (4.3) | 1.000 | | Overriding toe | 0 (0) | 3 (13.0) | 0.288 | | Scale | 9 (69.2) | 2 (8.7) | <0.001 | | Callus | 2 (15.4) | 2 (8.7) | 0.609 |
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Abbreviation: SD: standard deviation.
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