Ulcerative perianal lichen planus.
Payne
C M
CM
McPartlin
J F
JF
Hawley
P R
PR
D001004:Anus Diseases / Q000473:pathology*; D006801:Humans; D008010:Lichen Planus / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D014456:Ulcer / Q000473:pathology