Is feeling of fullness a symptom that can come with benign peritoneal tumors ?

Yes: Especially if they are in the left upper quadrant. Early satiety upon eating may be the first sign the tumor is fairly big.

Yes, and worse!: Sometimes, benign peritoneal growths may represent infection or just simple inflammatory bowel conditions or reactions. Pain can be prominent in the form of cramping. Bowel irregularity could occur depending on the amount, size, and number of benign tumors taking up space in the abdomen. These may just be more of a hassle than anything else, but you may need to maintain a certain diet, and monitor.