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Sex-related differences in primary metastatic site in rectal cancer; associated with hemodynamic factors?

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  • Sebastian Meltzer
  • Kine Mari Bakke
  • Karina Lund Rød
  • Anne Negård
  • Kjersti Flatmark
  • Arne Mide Solbakken
  • Annette Torgunrud Kristensen
  • Anniken Jørlo Fuglestad
  • Christian Kersten
  • Svein Dueland
  • Therese Seierstad
  • Knut Håkon Hole
  • Lars Gustav Lyckander
  • Finn Ole Larsen
  • Jakob Vasehus Schou
  • Dawn Patrick Brown
  • Hanna Abrahamsson
  • Kathrine Røe Redalen
  • Anne Hansen Ree
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Background and purpose: We investigated how features relating to pelvic cavity anatomy and tumor hemodynamic factors may influence systemic failure in rectal cancer.

Materials and methods: Rectal cancer patients (207 women, 343 men), who had been prospectively enrolled onto six cohorts and given curative-intent therapy, were analyzed for the first metastatic event. In one of the cohorts, the diameter of the inferior mesenteric vein (IMV) was assessed on diagnostic abdominal computed tomography images (n = 113). Tumor volume (n = 193) and histologic response to neoadjuvant therapy (n = 445) were recorded from diagnostic magnetic resonance images and surgical specimens, respectively.

Results: More women than men developed lung metastasis (p = 0.037), while the opposite was the case for liver metastasis (p = 0.040). Wider IMV diameter correlated with larger tumor volume (r = 0.481, p < 0.001) and male sex (p < 0.001). Female sex was the only adverse prognostic factor for lung metastasis. When sex, tumor volume, and histologic response were taken into consideration, poor tumor response remained the only determinant for liver metastasis (p = 0.002).

Conclusions: In a diverse rectal cancer population given curative-intent treatment, women and men had different outcome with regard to the primary metastatic site. Tumor hemodynamic factors should be considered in rectal cancer risk stratification.

Original languageEnglish
JournalClinical and Translational Radiation Oncology
Pages (from-to)5-10
Number of pages6
Publication statusPublished - Mar 2020

    Research areas

  • Metastasis, Radiology, Radiotherapy, Rectal cancer, Sex

ID: 61900468