Retroperitoneal cancer viability after postchemotherapy retroperitoneal lymph node dissection (PC-RPLND) in good risk germ cell tumors (GCTs).

Authors

Fadi Taza

Fadi Taza

Division of Hematology and Oncology, Indiana University Simon Cancer Center, Indianapolis, IN

Fadi Taza , Michal Chovanec , Anna Snavely , Nabil Adra , Nasser H. Hanna , Clint Cary , Timothy A. Masterson , Lawrence H. Einhorn , Costantine Albany

Organizations

Division of Hematology and Oncology, Indiana University Simon Cancer Center, Indianapolis, IN, Comenius University and National Cancer Institute, Bratislava, Slovakia, PDstat, Raleigh, NC, Indiana University Melvin and Bren Simon Cancer Center, Indianapolis, IN, Indiana University School of Medicine, Indianapolis, IN

Research Funding

Other

Background: Four cycles of etoposide and cisplatin (EP × 4) or 3 cycles of bleomycin, etoposide, and cisplatin (BEP × 3) is the current standard of care for patients with good-risk testicular cancer. We sought to examine the differences in the tumor viability for patients treated with EP x 4 vs BEP x 3 in the (PC-RPLND) specimens. Methods: The Indiana University (IU) Testicular Cancer Database was queried to identify IGCCCG good-risk patients who received EP × 4 or BEP × 3 induction chemotherapy followed by PC-RPLND. The primary endpoint was PC-RPLND cancer viability vs teratoma presence. Results: A total of 291 patients treated between 1988 and 2017 met the inclusion criteria. Median age was 28 (14.6-70.8) years. Primary histology was non-seminoma in 92.8%. Induction chemotherapy consisted of EP × 4 in 45 (15.5%) patients and BEP × 3 in 246 (84.5%). One hundred and sixty-six patients (57.2%) received chemotherapy outside the IU and were subsequently referred for PC-RPLND. Using a logistic regression model after accounting for age and time to surgery, patients who received EP x 4 have approximately 2.5 times the odds of having residual cancer viability in the PC-RPLND (Odds ratio 2.548, 95% CI 1.130-5.744, p = 0.024) and no significant difference in the odds of having teratoma (Odds Ratio 0.669, 95% CI 0.343-1.303, p = 0.237). Conclusions: Our retrospective study has shown differences in pathological outcomes for good risk GCT patients treated with EP x 4 vs BEP x 3. Patients who received BEPx3 had less residual cancer in the RP specimen at the time of PC-RPLND compared to EPx4 after adjusting for age and time to surgery. We prefer to use BEPx3 as first line chemotherapy in good-risk patients unless there is a contraindication for bleomycin.

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Abstract Details

Meeting

2018 ASCO Annual Meeting

Session Type

Poster Session

Session Title

Genitourinary (Nonprostate) Cancer

Track

Genitourinary Cancer—Kidney and Bladder

Sub Track

Germ Cell/Testicular

Citation

J Clin Oncol 36, 2018 (suppl; abstr 4551)

DOI

10.1200/JCO.2018.36.15_suppl.4551

Abstract #

4551

Poster Bd #

377

Abstract Disclosures