A positive diagnosis of benign ovarian tumor indicates a laparoscopic appro
ach or a conservative treatment. Benign ovarian tumors are often easy to re
cognize with non ionizing modalities such as US and MRI. The most common be
nign ovarian tumors are: mature teratomas including dermoid cysts, tumors i
n the fibro-thecal group including fibromas and thecomas, benign serous and
mucinous tumors (cystadenomas). Apart from ovarian tumors, endometriomas a
re more commonly extra ovarian, but may involve the ovarian stroma.