Giant ulcer in the stomach with white moss is not necessarily cancerous, and it is necessary to clip the tissue of the lesion for pathological diagnosis, and the pathological result is the gold standard for differentiating benign from malignant. Huge ulcer with white moss in the stomach is usually described in gastroscopy report. If the examiner finds a lesion, he or she will usually clip the mucosa of the lesion through biopsy forceps and send it for pathologic examination. A complete pathologic diagnosis generally takes 3 to 7 days to produce a report, and you can consult your local hospital for details. If the diagnosis is benign ulcer, it is necessary to consult the doctor in time, treat it actively and review it regularly. If the diagnosis is precancerous lesions, consult the doctor whether endoscopic treatment is feasible. If the diagnosis is malignant tumor, we must calm down, actively improve the relevant examination, actively cooperate with the treatment, and consider whether to perform surgical treatment. If there is any discomfort in daily life, it is recommended to consult a doctor in time to avoid delaying the condition.