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隐匿性肺癌指那些在支气管分泌物中查到癌细胞,但胸部 X 线透视、照片均无异常,亦无淋巴结或转移的早期肺癌。这是因为肺癌病变太小,多数为原位癌或微小的浸润癌。无痛性心梗临床中有相当一部分老人,心肌梗塞并无胸痛发生,称为无痛性心梗。建议进入老年期且患有心脑血管病变的老人,要经常去医院诊治,检查心电图,测血清酶,及时发现无痛性心梗,避免猝死的发生。无痛性血尿临床上老年人无痛性血尿多见,由炎症或结石引起。血尿都伴有肾绞痛、腰区痛或排尿痛等症
Occult lung cancer refers to those who found in the bronchial secretions of cancer cells, but the chest X-ray, photographs were normal, nor lymph node metastasis or early lung cancer. This is because lung cancer is too small, the majority of carcinoma in situ or tiny invasive cancer. Painless myocardial infarction in a considerable part of the elderly, myocardial infarction without chest pain, known as painless myocardial infarction. It is recommended to enter the elderly and suffering from cardiovascular and cerebrovascular diseases of the elderly, often go to the hospital for treatment, check the ECG, serum enzymes, timely detection of painless myocardial infarction, to avoid sudden death. Painless hematuria clinically elderly painless hematuria more common, caused by inflammation or stones. Hematuria is associated with renal colic, lumbar pain or dysuria embolism