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Updated: Mar 24, 2026

Gene Regulation and Targeted Therapy in Gastric Cancer Peritoneal Metastasis: Radiological Findings from Dual Energy CT and PET/CT
Published on: January 22, 2018
[A case of gastric endocrine cell carcinoma which was significantly reduced in size by radiotherapy]
Kiyoshi Azakami1, Kouji Nishida, Ken Tanikawa
1Gastroenterology, Sankoukai Miyazaki Hospital.
Abstract:
In 2010, the World Health Organization classified gastric neuroendocrine tumors (NETs) into three types: NET grade (G) 1, NET G2 and neuroendocrine carcinoma (NEC). NECs are associated with a very poor prognosis. The patient was an 84-year-old female who was initially diagnosed by gastrointestinal endoscope with type 3 advanced gastric cancer with stenosis of the gastric cardia. Her overall status and performance status did not allow for operations or intensive chemotherapy. Palliative radiotherapy was performed and resulted in a significant reduction in the size of the tumor as well as the improvement of the obstructive symptoms. She died 9 months after radiotherapy. An autopsy provided a definitive diagnosis of gastric endocrine cell carcinoma, and the effectiveness of radiotherapy was pathologically-confirmed. Palliative radiotherapy may be a useful treatment option for providing symptom relief, especially for old patients with unresectable advanced gastric neuroendocrine carcinoma.
Insights
Palliative radiotherapy can effectively manage symptoms in elderly patients with unresectable gastric neuroendocrine carcinoma (NEC). This case study confirms radiotherapy
Area of Science:
- Oncology
- Gastroenterology
- Radiotherapy
Background:
- Gastric neuroendocrine tumors (NETs) are classified by the WHO into NET G1, NET G2, and neuroendocrine carcinoma (NEC).
- Neuroendocrine carcinomas (NECs) present a poor prognosis.
- Advanced gastric cancer requires tailored treatment strategies, especially in elderly patients with poor performance status.
Observation:
- An 84-year-old female presented with advanced gastric cancer (type 3) causing stenosis.
- The patient's condition precluded surgery or intensive chemotherapy.
- Palliative radiotherapy was administered to manage symptoms and tumor burden.
Findings:
- Radiotherapy led to significant tumor size reduction and alleviated obstructive symptoms.
- Autopsy confirmed gastric endocrine cell carcinoma and pathologically validated radiotherapy's effectiveness.
- The patient survived for 9 months post-radiotherapy.
Implications:
- Palliative radiotherapy offers a viable option for symptom relief in elderly patients with unresectable advanced gastric NEC.
- This approach may improve quality of life for patients ineligible for aggressive treatments.
- Further research into palliative radiotherapy for advanced gastric NEC is warranted.
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