Perianal ulcer caused by beta hemolytic Streptococcus group A.
D001003:Anal Canal; D006801:Humans; D010502:Perineum; D013290:Streptococcal Infections; D013291:Streptococcus; D013297:Streptococcus pyogenes; D014456:Ulcer
ANUS; STREPTOCOCCAL INFECTIONS; ULCER