青年患者，轻咳少痰，CT发现右下肺3cm大小结节，边界清楚，密度欠均匀，其内可见粗大颗粒状"爆玉米花"样钙化。该患者应考虑为() ["A．肺癌","B．结核瘤","C．错构瘤","D．炎性假瘤","E．肺转移瘤"]
线粒体病的临床表现。
男，16岁，左大腿肿痛2个月余，x线摄片示左股骨下端溶骨性破坏，边界模糊，可见"骨膜三角"征。该患者应诊断为() ["A．骨髓炎","B．骨结核","C．骨梅毒","D．骨肉瘤","E．骨软骨瘤"]
钼靶照片上，早期乳腺导管癌的特征性X线表现是() ["A．不规则性肿块","B．肿块触诊较X线显示为大","C．砂粒样钙化","D．皮肤增厚、乳头下陷","E．血管扭曲增粗，腋下淋巴结肿大"]
中耳炎肉芽型又称() ["A．咽鼓管鼓室型","B．胆脂瘤型","C．粘膜型","D．骨疡型","E．单纯型"]
临床上作血、尿氨基酸分析的指征是什么?
