Signs of gastric celiac disease to cancerous transformation are usually emaciation, chronic atrophic gastritis, gastric ulcer, abdominal mass, vomiting blood and black stools, etc. It is recommended to seek medical treatment in time. 1. Wasting: if patients with celiac disease lose weight in a short period of time, it may be caused by cancerous transformation of celiac disease and rapid growth of cancer cells, which consume nutrition of the body. 2. Chronic atrophic gastritis: when the glands of gastric mucosa of patients with gastric celiac disease have atrophied to different degrees, thus developing into chronic atrophic gastritis, it may cause intestinal epithelial hyperplasia and atypical hyperplasia, which may lead to the occurrence of cancer. Therefore, chronic atrophic gastritis may be the signal of cancer of gastric erosion. 3. Gastric ulcer: it refers to the disease caused by ulceration of inner wall mucosa or deep layer, and the malignant transformation of gastric ulcer is cancer, therefore, when gastric erosion develops into gastric ulcer, it may be a signal of cancer. 4. Abdominal mass: when gastric erosion develops into gastric ulcer and cancer occurs, the ulcer will become hard and big, which will be manifested as abdominal mass. Therefore, the appearance of abdominal mass may be a sign of cancerous change of celiac disease. 5. Vomiting blood and black stools: when patients with celiac disease have vomiting blood, anemia and black stools, they may be developing cancer. If the above manifestations exist, attention should be paid and timely medical treatment should be sought.