Nail Signs due to abnormal nail matrix function – Onychorrhexis 脆甲症
Onychorrhexis is characterised by longitudinal ridge and fissure of the nail plate. It is often associated with nail thinning, indicating damage to the nail matrix. It may caused by lichen planus, trauma, and tumors. It is also common phenomenon of age-related ridging of the nail plate.
脆甲症是指甲板的纵向脊和裂缝。它通常与指甲变薄有关,表明指甲基质受损。它可能由扁平苔藓,创伤和肿瘤引起。如果没有以上病变,就是年老体弱,甲板薄了。
Reference:
- Antonella Tosti, Bianca Maria Piraccini. In: Jean Bolognia Julie Schaffer Lorenzo Cerroni, editors. Dermatology: 2-Volume Set 4th Edition. Elsevier; 2017. p1204-1205.
- J Hardin, RM Haber: Onychomadesis: literature review. Br J Dermatol. 172:592-596 2015