CT, MRI, and FDG-PET imaging findings of low-grade extrauterine endometrial stromal sarcoma arising from the mesentery: A case report

• Main Authors: Satoshi Suzuki, MD, Ryo Kurokawa, MD, PhD, Tetsushi Tsuruga, MD, PhD, Mayuyo Mori‑Uchino, MD, PhD, Haruka Nishida, MD, PhD, Tomoyasu Kato, MD, PhD, Hiroyuki Abe, MD, PhD, Tetsuo Ushiku, MD, PhD, Shiori Amemiya, MD, PhD, Akira Katayama, MD, Osamu Abe, MD, PhD
• Format: Article
• Language: English
• Published: Elsevier 2021-09-01
• Series: Radiology Case Reports
• Subjects: Extrauterine endometrial stromal sarcoma; Mesentery; JAZF1; Computed tomography; Magnetic resonance imaging; Fluorodeoxyglucose-positron emission tomography
• Online Access: http://www.sciencedirect.com/science/article/pii/S1930043321004404
• ISSN: 1930-0433

Endometrial stromal sarcoma is a rare uterine mesenchymal neoplasm, and extrauterine endometrial stromal sarcoma is even rarer, with a limited number of case reports. In the present report, we present a case of low-grade extrauterine endometrial stromal sarcoma originating from the mesentery in a 49-year-old woman, without endometrial stromal sarcoma in the uterus or evidence of endometriosis. The tumor was diagnosed using recombination of the JAZF1 gene by fluorescence in situ hybridization. Computed tomography, magnetic resonance imaging, and 18F-fluorodeoxyglucose positron emission tomography/computed tomography showed a 13 cm, primarily polycystic, mass containing a contrast-enhancing solid component with restricted diffusion and mild 18F-fluorodeoxyglucose uptake. A large cystic component may be a characteristic feature of extrauterine endometrial stromal sarcoma, given the low pressure from the surrounding tissues.