- Design
- Single-centre retrospective cohort with propensity matching
- Population
- 666 resected gastric cancers, 27 with a neuroendocrine carcinoma component
- Primary outcome
- Overall and recurrence-free survival
- Effect
- Worse OS and RFS with NEC component; nodal deposits mainly NEC
This retrospective cohort from a Beijing hospital compared 27 resected gastric adeno-neuroendocrine carcinomas with 639 conventional gastric adenocarcinomas between 2011 and 2022, using 1:3 propensity matching.
Tumours with a neuroendocrine carcinoma component had worse overall and recurrence-free survival and more liver metastasis. Lymph node metastases were composed predominantly of the neuroendocrine component. That component showed higher ASCL1 and phospho-STAT3 and fewer CD8 T cells than the paired adenocarcinoma.
For reporting, the practical point is that the neuroendocrine component, even when a minority, may be the part that spreads. Quantifying it and reporting it clearly gives oncologists information they can act on.
- Look for a neuroendocrine carcinoma component in poorly differentiated gastric cancers
- Confirm with synaptophysin, chromogranin and Ki-67 where morphology suggests it
- Report the proportion of the neuroendocrine component
- Note whether nodal deposits are adenocarcinoma, neuroendocrine or mixed
Why it matters
The component that metastasises may differ from the one that dominates the primary.
Don't overread it
With 27 cases from one centre, the size of the survival difference is uncertain.
The statistics, in plain English
With only 27 mixed tumours, survival estimates are imprecise even after matching. The molecular findings come partly from public sequencing data and cell experiments, which suggest mechanism but do not prove it in patients.
Read the rest in the app
You have read your two free briefings this month. The app carries all 27 specialties, every morning, free — and this finding is waiting in it.
Scan to keep reading on your phone. No account needed to start.
Tomorrow morning, before your first patient
One edition a day for pathology, written by the desk, every claim tied to its paper. Six minutes.
Get the app — free