Ecthyma Watchlist (log in to enable) Retrieved 2021-01-18 Source Wikipedia Trials — Genes PDGFC Drugs — Interested in hearing about new therapies? Registered! Ecthyma is a variation of impetigo, presenting at a deeper level of tissue. It is usually associated with Group A (beta-hemolytic) Streptococcus (abbreviated GAS). See also Ecthyma gangrenosum