gastrone

例句：

1. 1. He was diagnosed with a gastric tumor and underwent surgery to remove it.
   他被发现患有胃瘤，并接受了手术来切除它。
2. 2.The gastric tumor was found to be malignant and required aggressive treatment.
   这个胃瘤被诊断为恶性的，需要积极的治疗。
3. 3. Gastric neoplasms are rare but can cause significant health problems if left untreated.
   胃癌是罕见的，但如果不治疗，可能会导致严重的健康问题。