Cutaneous dental (or odontogenic) sinus tracts are uncommon occurrences in which a channel forms from a dental focus of infection to a drainage site on the skin of the face or neck. Odontogenic sinus ...

If viewers have never seen a hairless rat with a pustule on its neck, or a plump fair pig with an abscess on its rump, they are in for a treat as some of National Geographic's most renowned and ...