Fibroids are categorized into four types, depending on where they develop within the uterus. Intramural fibroids: Some fibroids develop within the muscular layer of the uterus, becoming part of the uterine wall and possibly changing its structure and overall size. Submucosal fibroids: These fibroids form just beneath the uterine lining, pressing into the inner cavity of the uter... https://www.drsarada.com/blog/uterine-fibroids-and-pcos