【摘要】 患者男,42岁。因面部及颈部红斑、结节伴破溃3年就诊。患者20年前因爆破石头而伤及面部,不久面部伤口完全愈合。3年前在原外伤部位出现红斑、结节,伴有破溃,自觉症状不明显。组织病理学检查发现上皮样肉芽肿形成,偏振光显微镜下见灰色结晶颗粒,经X线衍射光谱分析法证实组织内硅含量升高,X线衍射分析证实其为二氧化硅。更多还原

【Abstract】 A 42-year-old man presented with erythematous papules and nodules with ulcer on his face and neck for 3 years,where dirt and sand were imbedded in an accident twenty years ago.The wounded site was healed soon,and erythematous papules and nodular eruptions with ulcer did not occur in the originally involved sites until 3 years ago.Histopathologic findings showed sarcoidal granulomas.The presence of silica components in the granulomas was confirmed by polarized light microscopy and X-ray microanalysis of the lesions on the face and neck,respectively.更多还原