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Updated: Jul 8, 2026

Tubal Cytology of the Fallopian Tube as a Promising Tool for Ovarian Cancer Early Detection

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Published on: July 25, 2017

Serous carcinogenesis in the fallopian tube: a descriptive classification.

Elke Jarboe¹, Ann Folkins, Marisa R Nucci

¹Department of Pathology, Division of Women's and Perinatal Pathology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA. ejarboe@partners.org

International Journal of Gynecological Pathology : Official Journal of the International Society of Gynecological Pathologists

|December 25, 2007

Summary

The fimbria is the origin of early serous cancer (STIC) in BRCA+ women. This study defines the serous carcinogenesis in the tube (SCAT) sequence, showing a continuum of epithelial changes from precursor lesions to STIC.

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Area of Science:

Gynecologic Oncology
Pathology
Cancer Biology

Background:

The fimbria of the fallopian tube is implicated as the most common site for early serous cancer (STIC) in BRCA mutation carriers.
A precursor lesion, the p53 signature, has been identified in fimbrial secretory cells, suggesting a "serous carcinogenesis in the tube" (SCAT) pathway.

Purpose of the Study:

To characterize the morphological and immunohistochemical features of the SCAT sequence.
To define the stages of epithelial change from p53 signatures to STIC in the fallopian tube.

Main Methods:

Examination of fallopian tubes from three distinct patient populations: women without ovarian cancer, women with BRCA mutations, and women with coexisting pelvic serous cancer.
Morphological assessment including nuclear stratification, proliferative index (MiB1), and growth disorganization.
Immunohistochemical analysis for p53 and gamma-H2AX (DNA damage marker).

Main Results:

The SCAT sequence was characterized by p53 signatures (0-30% MiB1) and tubal intraepithelial carcinomas (STICs) (>45% MiB1).
An intermediate category of p53-positive foci (40-75% MiB1) with features between signatures and STICs was identified.
A continuum of epithelial changes was observed, with documented transitions between these categories.

Conclusions:

The study validates the SCAT sequence and identifies the fimbrial secretory cell as a likely origin for many pelvic serous carcinomas.
The findings support a step-wise progression model for serous carcinogenesis originating in the fallopian tube.