9Protsenko A, Sorkin V, Syromiatnikov A. Results of esophageal cancer surgical treatment in multiple primary neoplasma[ J]. Anirurgila Mosk, 1998,12 : 10 - 12.
10[1]Suri RK. Double primary malignant lerion of the esophagus.Aeaserepot Indian J Cancer, 1974, 11:444