yī / shēng / jiě / shì / shuō / kān / yǐng / tōng / cháng / tí / shì / wèi / bì / cún / zài / kuì / yáng医生解释说,龛影通常提示胃壁存在溃疡。The doctor explained that a niche sign usually indicates an ulcer in the stomach lining.