Quick Answer. According to Dr. W. David Stinson, fundal fibroids are fibroids that are located in the fundus, which is the top of the uterus. While fibroids can be found anywhere in the uterus, fundal fibroids are the type that occur most frequently. Fibroids are the formation of fibrous connective tissues that make up a mass of cells, resulting in a lump or tumor. These tumors are benign.