"The tumor breaks through the outer surface of the bone"
My first instinct is to say Hom Dop jeq ghul (or whatever
word you're using for tumor). But then, you can even just
say Hom jeq ghul.
Next I wonder whether Okrand has ever said that the wall-words
only apply to architecture. Perhaps the outer surface of a bone is
its reD.
-- SuStel http://trimboli.name