A retrospective analysis of lymph node status in advanced ovarian, fallopian, and peritoneal cancer

• Published in: Journal of clinical oncology Vol. 35; no. 15_suppl; p. e17074
• Main Authors: Itani, Yoshio, Morita, Sayuri, Sugimoto, Hitomi, Takeda, Yoshiki, Sasaki, Yoshikazu, Ishibashi, Satoko, Shugiura, Atsushi, Hirano, Hitoshi, Toyoda, Shinji, Kita, Tsunekazu
• Format: Journal Article
• Language: English
• Published: 20.05.2017
• ISSN: 0732-183X; 1527-7755
• DOI: 10.1200/JCO.2017.35.15_suppl.e17074

Abstract only e17074 Background: The purpose of this study was to assess lymph node (LN) status; greatest dimension (D), D of metastatic LN (LN (+)) foci (MF), number of LN (+) of each patient, and MF area aggregated in each patient affected by LN metastasis in FIGO stage III and IV ovarian, fallopian, and peritoneal cancer. Methods: We researched the consecutive 25 patients who underwent primary debulking surgery or neoadjuvant chemotherapy (NAC) followed by interval debulking surgery including systemic lymphadenectomy from 2004 to 2015. Non-serous histology was 20 % (5/25). LN (+) were detected in 12.6% (169/1344) of lymph node preparations. Results: The patients’ median age was 53 years. Median number of LN (+) and sum of MF area in each patient were 2 (range 0-37) and 2 mm 2 (range 0- 498). Mean D of the entire LN and of the MF were 4.7mm (95%Confidence Interval (CI); 4.5,4.9) and 6.1mm(95% CI; 5.2, 7.0). The LN (+) displayed a significantly larger mean D value (7.9 mm, 95% CI: 7.4, 8.5) than the non-metastatic lymph nodes (LN (-)) (4.2 mm, 95% CI: 4.0, 4.4) (p<0.05; student t test). D of MF (mm) was approximated by LN (+) area (mm 2 ) as follows; (D of MF) = 2.58+ 0.094*(LN (+) area)+ 0.062* ( ( LN (+) area)-43.2) 2 ; R 2 =0.75; p<0.0001. The D of MF with NAC, 5.0 mm (95%CI: 3.6, 6.4) demonstrated smaller than that without NAC, 7.0 mm (95%CI: 5.8, 8.1) (p<0.05; student t test). The proportion of LN (-) patients was significantly higher in the NAC group (44%, 4/9) than in the non-NAC group (6%, 1/16) (p=0.022). D of LN (+), D of MF ≥10 mm, sum of MF area, and number of LN (+) ≥ 2 did not achieve statistical significance in analysis with the relative risk (RR) of death. Conclusions: LN (+) exhibits larger D than LN (-) and D of MF could be estimated by LN (+) area. Some MFs shrink after NAC, and hence, become difficult to detect pathologically. In advanced ovarian, fallopian, and peritoneal cancer LN size and sum of MF area could not show an impact on prognosis.