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Low-grade endometrial stromal sarcoma recurring after 9 years
Kaoru Yokosuka1, Makiko Kumagai, Sayuri Aiba
1Department of Obstetrics and Gynecology, Shiseikai Daini Hospital, Tokyo, Japan.
Southern Medical Journal
|November 12, 2002
Summary
Recurrent low-grade endometrial stromal sarcoma (ESS) showed bizarre cells resembling various cell types. Prognosis may depend on extrauterine development rather than cell division.
Area of Science:
- Gynecologic Oncology
- Pathology
- Cell Biology
Background:
- Endometrial stromal sarcoma (ESS) is a rare uterine malignancy.
- Low-grade ESS typically has a favorable prognosis but can recur.
- Understanding recurrence mechanisms is crucial for patient management.
Observation:
- A 61-year-old woman with recurrent low-grade ESS presented 9 years after initial treatment.
- Both initial and recurrent tumors exhibited similar ultrasonographic features.
- Histological examination of the recurrent tumor revealed atypical cells in the periphery.
Findings:
- The bizarre peripheral cells in recurrent low-grade ESS resembled glandular cells, high-grade ESS comet cells, fibroblasts, and decidual/predecidual stromal cells.
- These cellular changes suggest a differentiation process similar to mesenchymal stem cell differentiation.
- Recurrence and prognosis of low-grade ESS may be linked to extrauterine development, not solely mitotic activity or DNA content.
Implications:
- This study suggests that cellular differentiation and extrauterine factors play a significant role in the recurrence and prognosis of low-grade ESS.
- Further research into the differentiation pathways and extrauterine behavior of ESS is warranted.
- These findings could lead to novel therapeutic strategies targeting ESS recurrence.