Gastroscopy bụ usoro ahụike a na-ejikarị enyocha n'ime usoro nri nri, karịsịa esophagus, afo, na akụkụ mbụ nke obere eriri afọ (duodenum). A na-eme usoro a site na iji tube na-agbanwe agbanwe nwere ọkụ na igwefoto na njedebe, na-ekwe ka dọkịta hụ ...
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