squamous cell carcinoma

OK, that title is a bit overblown, but it's also correct. Sort of. Although incredibly rare, decades ago a small number of people had their fingers chopped off because they were wearing wedding rings.
You may have noticed a number of headlines referencing the “Tree Man” from Bangladesh with claims he is “cured” after 16 operations for his rare genetic disorder that transformed his hands and feet into bark-like warts and cutaneous horns.