- In a patient with chronic onycholysis with oozing that is unresponsive to therapy, consider Bowen’s disease of the nail bed.
- A thickened nail with white longitudinal and channels with splinter hemorrhages are likely to be an onychomatricoma.
- Brittle nails can be caused by or exacerbated by anemia and hypothyroidism.
- New onset pincer nails can be drug induced, the most common of which is beta blockers.
- A strong association of subungual glomus tumors and type 1 Neurofibromatosis has been identified.
- Longitudinal erythronychia (red band in the nail) is most commonly due to an onychopapilloma but other rare causes include SCC and amelanotic melanoma.
