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Updated: Aug 23, 2026
Microsatellite DNA Genotyping and Flow Cytometry Ploidy Analyses of Formalin-fixed Paraffin-embedded Hydatidiform Molar Tissues
Published on: October 20, 2019
Flow cytometric analysis of DNA ploidy and S-phase fraction of Stage IIIB cervical carcinoma
S Wilailak1, M Rochanawutanon, S Srisupundit
1Department of Obstetrics and Gynaecology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
Objectives:
To evaluate the role of flow cytometry-measured DNA ploidy and S-phase fraction as survival prognostic indicators in women with FIGO Stage IIIB squamous cell carcinoma of cervix.
Methods:
We retrospectively reviewed the medical and pathological records of women with Stage IIIB squamous cell cervical carcinoma treated between 1993 and 1996. Flow cytometric analysis of DNA ploidy and S-phase fraction was performed by the modified Hedley technique using paraffin-embedded tissue. Survival was calculated using the Kaplan-Meier life-table analysis.
Results:
Of the 75 cases, 66 were analyzable. Diploid tumors were found in 73%. The mean S-phase fraction was 14% (SD = 5.4). The overall 5-year survival rate was 60%. The survival of patients with aneuploidy tumors was significantly worse than that of the diploid tumors (p = 0.001). The survival of the patients who had S-phase fraction > 12% was significantly worse than those who had S-phase fraction < or =12% (p = 0.04).
Conclusions:
In this homogeneous study population, we found that aneuploidy and S-phase fraction >12% correlated with poor survival. Identifying this poor prognostic group would be of benefit in considering additional treatment for a better outcome.
