Ambiguous Igneous Rocks
Abstract
Hypertrophic lichen planus clearly resembles extrusive igneous rock, as nicely shown by Welsh et al.1 But I ask 1 question: What image does the term igneous rock create in the mind of a dermatologist (or a geologist, for that matter)? Unlike the term peau d'orange, for instance, which creates a specific image, the term igneous rock conjures up no specific image. To a dermatologist like myself from New England, igneous rock might suggest granite. But to someone from the West Coast or...