Uterine fibroids can appear in various areas of the uterus, leading to different categorization based on the location of the patient’s tissue mass. There are 4 distinct types of fibroids, which include: Pedunculated fibroids: A fibroid that develops a supportive stem that forms at the base of the tumor. Subserosal fibroids: A type of uterine fibroid that grows along the outside of the uterus. Intramural fibroids: The most common kind of uterine fibroid, which appears within the uterine wall itself. Submucosal fibroids: Similar to the intramural fibroid type, these fibroids also develop within the uterine wall, though they more specifically exist within the submucosal layer of this muscular tissue.