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WT1 expression in the female genital tract
1Pathology Department, Massachusetts General Hospital, Boston, USA.
Advances in Anatomic Pathology
|October 14, 2011
Summary
Wilms tumor gene 1 (WT1) expression aids in diagnosing female genital tract neoplasms. WT1 is valuable for differentiating synchronous serous carcinomas and distinguishing sex cord stromal tumors from endometrioid carcinomas.
Area of Science:
- Gynecologic Pathology
- Surgical Pathology
- Oncology
Background:
- Wilms tumor gene 1 (WT1) is expressed in normal tissues and neoplasms of the female genital tract.
- WT1's role in differential diagnosis requires comprehensive understanding.
Purpose of the Study:
- To review WT1 expression in the female genital tract.
- To evaluate the utility of WT1 in the differential diagnosis of gynecologic neoplasms.
Main Methods:
- Review of existing literature on WT1 expression in female genital tract neoplasms.
- Analysis of WT1 utility in distinguishing various gynecologic tumor types.
Main Results:
- WT1 is valuable for differentiating synchronous serous carcinomas (ovary/fallopian tube/peritoneum and endometrium), indicating extrauterine origin.
- WT1 distinguishes sex cord stromal tumors (positive) from endometrioid ovarian carcinomas (negative).
- WT1 is not helpful for distinguishing ovarian serous carcinomas from transitional carcinomas or serous tumors from mesotheliomas.
Conclusions:
- WT1 expression is a useful marker in specific differential diagnoses within gynecologic pathology.
- WT1's utility is limited in certain tumor distinctions, necessitating complementary diagnostic methods.
- WT1 (C-terminal) positivity helps differentiate intra-abdominal desmoplastic round cell tumors from other small round cell tumors, except small cell carcinoma of hypercalcemic type.
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