Subserosal uterine leiomyoma is a subtype of uterine leiomyoma that often exophytically projects outwards from a subserosal location. While its exact definition may vary, a leiomyoma is often called subserosal if >50% of the fibroid protrudes out of the serosal surface of the uterus 2. They can be either sessile or pedunculated.
They are usually asymptomatic although some pedunculated subserosal leiomyomas may undergo torsion, which results in infarction accompanied by pain 1.
Subserosal leiomyomas may demonstrate the bridging vessel sign, which represents flow voids in feeding branches of the uterine arteries3.
Please refer to the main article on uterine leiomyomas for a detailed discussion on their other imaging features.
- 1. Murase E, Siegelman ES, Outwater EK et-al. Uterine leiomyomas: histopathologic features, MR imaging findings, differential diagnosis, and treatment. Radiographics. 19 (5): 1179-97. Radiographics (full text) - Pubmed citation
- 2. Bajekal N, Li TC. Fibroids, infertility and pregnancy wastage. Hum. Reprod. Update. 6 (6): 614-20. doi:10.1093/humupd/6.6.614 - Pubmed citation
- 3. Khashper A, Addley HC, Abourokbah N et-al. T2-hypointense adnexal lesions: an imaging algorithm. Radiographics. 2012;32 (4): 1047-64. doi:10.1148/rg.324115180 - Pubmed citation