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. 2023 Sep 18;408(1):363.
doi: 10.1007/s00423-023-03100-2.

Oncological recurrence following pathological complete response after neoadjuvant treatment in patients with esophageal cancer - a retrospective cohort study

Affiliations

Oncological recurrence following pathological complete response after neoadjuvant treatment in patients with esophageal cancer - a retrospective cohort study

Julian Hipp et al. Langenbecks Arch Surg. .

Abstract

Background: To evaluate recurrence in patients with post-neoadjuvant pathological complete response (pCR) and in patients with complete response of primary tumor but persisting lymphatic spread of disease (non-pCR, ypT0ypN +) of esophageal cancer.

Methods: Seventy-five patients (63 pCR, 12 non-pCR) were analyzed retrospectively. Pattern and incidence of local and distant recurrence as well as the impact on overall (OS) and disease-free survival (DFS) were evaluated. The efficacy of neoadjuvant chemotherapy according to FLOT protocol was compared to neoadjuvant chemoradiation according to CROSS protocol.

Results: In the pCR group, isolated local recurrence was diagnosed in 3%, while no isolated local recurrence was observed in the non-pCR group due to the high incidence of distant recurrence. Distant recurrence was most common in both cohorts (isolated distant recurrence: pCR group 10% to non-pCR group 55%; simultaneous distant and local recurrence: pCR group 3% to non-pCR group 18%). Median time to distant recurrence was 5.5 months, and median time to local recurrence was 8.0 months. Cumulative incidence of distant recurrence (with and without simultaneous local recurrence) was 16% (± 6%) in pCR patients and 79% (± 13%) in non-pCR patients (hazard ratio (HR) 0.123) estimated by Kaplan-Meier method. OS (HR 0.231) and DFS (HR 0.226) were significantly improved in patients with pCR compared to patients with non-pCR. Advantages for FLOT protocol compared to CROSS protocol, especially with regard to distant control of disease (HR 0.278), were observed (OS (HR 0.361), DFS (HR 0.226)).

Conclusion: Distant recurrence is the predominant site of treatment failure in patients with pCR and non-pCR grade 1a regression, whereby recurrence rates are much higher in patients with non-pCR.

Keywords: Chemoradiation; Chemotherapy; Esophageal cancer; Esophagogastric junction cancer; Multimodal treatment; Neoadjuvant treatment; Oncologic surgery; Pathological complete response; Visceral surgery.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
Study flow chart
Fig. 2
Fig. 2
Timing of recurrence in patients with pCR and non-pCR after neoadjuvant treatment for esophageal cancer. A Distant recurrence: in patients with pCR, distant recurrence (with or without simultaneous local recurrence) occurred in 16% (± 6%) of patients, while in non-pCR patients, distant recurrence occurred in 79% (± 13%) of patients following R0 resection of esophageal cancer (HR 0.123 (95% CI: 0.046–0.331, p < 0.001). B Isolated local recurrence: isolated local recurrences occurred in 4% (± 2%) of patients with pCR. Isolated local recurrence of EC did not occur in non-pCR patients in our cohort due to the devastating incidence of simultaneous distant recurrence of disease, although 2 of 11 patients (18%) did have simultaneous local recurrence (Table 2)

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