Colonoscopy, normal mucosa. localized granularity and petechiae were noted in the ileo-cecal valve and appendiceal orifice. is this something serious?

?inflammation: Could these findings indicate some degree of inflammatory bowel disease like Crohn disease? Your gastroenterologist is best qualified to answer your question,however.

Biopsy?: It sounds like an irritation from either prep or camera. If biopsy was taken then it would show any abnormality. I would not worry too much - since it was not a polyp or a mass.