<prompt> Smoking is most commonly associated with which type of lung cancerSmall cell cancerSquamous cell cancerAdenocarcinomaCarcinoid tumor  <response>: All histologic types of lung cancerwere significantly associated with cigarette smoking. The association was stronger with squamous cellcarcinoma SQC and small cellcarcinoma SCLC than with large cell cancer LGC and adenocarcinoma ADC. 