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对359例不同病期不同病理类型的胃十二指肠恶性肿瘤病人及50名非癌病人进行胃液的激光散射光谱的研究。发现在470nm光散射峰的强度胃十二指肠恶性肿瘤病人是非癌病人的4～10倍，平均7倍。术前259例，阳性率达93％以上；术后85例，转阴率达84．7％，复发胃癌15例，阳性率86．66％。不同病理类型的胃十二指肠恶性肿瘤之间，阳性率无显著差异（P＞0．05）。术后仍呈阳性者为三期及四期胃癌行姑息手术者。因此，激光散射光谱可作为胃十二指肠恶性肿瘤治疗过程的监测手段。
The laser scattering spectra of gastric juice in 359 patients with different pathological types of gastric and duodenal malignant tumors and 50 non-cancer patients were studied. The intensity of the light scattering peak at 470 nm was found to be 4 to 10 times more common in patients with gastric and duodenal malignancies, with an average of 7 times. Preoperative 259 cases, the positive rate of more than 93%; 85 cases after surgery, negative rate of 84.7%, 15 cases of recurrent gastric cancer, the positive rate of 86.66%. There was no significant difference in the positive rate between different pathological types of gastric and duodenal malignant tumors (P>0.05). Those who remained positive after surgery were those who underwent palliative surgery for stage III and IV gastric cancer. Therefore, laser scattering spectroscopy can be used as a monitoring tool for the treatment of gastric and duodenal malignancies.