The Collaborative International Dictionary of English v.0.48:

Aden ulcer \A"den ul"cer\ ([aum]"den [u^]l"s[~e]r or [=a]"den
   [u^]l"s[~e]r). [So named after Aden, a seaport in Southern
   Arabia, where it occurs.] (Med.)
   One of the numerous names of the lesion of Old World
   cutaneous leishmaniasis. Called also Aleppo boil, Aleppo
   button, Aleppo evil, Bagdad boil, Biskra boil, Cochin
   China ulcer, Delhi boil, Jerico boil, Oriental boil,
   Oriental sore, Persian ulcer, tropical ulcer, etc.
   [Webster 1913 Suppl. + AS]