裂爿1或2或全部具小瘤，边缘具小齿。
方法：应用MTT显色分析法测定40例非小细胞肺癌实体瘤标本对9种化疗药物及其组成的联合化疗方案的敏感性或耐药性，并比较结果。
Methods: the drug sensitivity or resistance of 40 NSCLC samples to 9 chemotherapeutic drugs and combined chemotherapy were detected by MTT colorimetric assay, and compared the results.
两种重要的鉴别诊断是：转移性黑色素瘤和转移性小细胞（或神经内分泌）癌。
Two important differential diagnoses exist in this direction - metastatic melanoma and metastatic small cell (or neuroendocrine) carcinoma.
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