77 girls with anorectal maldevelopments were treated from 1979 to 1999. Long-term results were followed up from 2 to 20 years in 65 patients. Functional methods of sphincters examination, clinical examination and interview were used. Good and satisfactory results were achieved in 90% patients. Complex of functional methods, clinical examination and interview permits to evaluate objectively long-term results of anorectal maldevelopments' surgical treatment. The modification of Riccioli operation has a number of advantages over other surgical methods of treatment of anorectal maldevelopments with fistulas into genital organs and permits to achieve good long-term functional results in the majority of patients with intermediate and lower forms of anorectal maldevelopments.