Is It Necessary To Have Endoscopy Every Month For NASH Syndrome With Esophageal Varices?

My aunt has the NASH syndrome with esophageal varices. On doctor has told her she should have an endoscopy each month to band any vericies. She didn t have an endoscopy for 12 months with no trouble. She had an endoscopy in October, 4 varices were banded; she had another endoscopy on Dec 10, 3 varices were banded, no bleeding either time. On December 16, she started bleeding, had to have two units of blood and one varice was banded and another that was bleeding was banded. Is it necessary or even advisable for her to have an endoscopy every month? Another doctor told her to not have it done monthly, only as needed fro bleeding.