Assertion: black toenail | /r/CreatedBy | melanoma
Facets:
value: in rare cases
type: OTHER
Source sentences:
text: Black toenail from running Q: How can someone who runs marathons distinguish a black toenail caused by trauma from a black toenail caused by something serious, such as melanoma?
text: Black toenail caused by melanoma and other health conditions are symptomatic.
text: In rare cases, a black toenail may be caused by melanoma.
text: Black toenails can also be caused by trauma, autoimmune disorders, and melanoma.