<prompt> A pt. comes with stony hard, painless lymphnode in left supraclavicular fossa A biopsy repo states Sq cell Carcinoma. What is the diagnosis -Stomach carcinomaBreast carcinomaLung carcinomaPancreas carcinoma  <response>: Ans is c ie. Lung Carcinoma Out of the 4 options only lung Ca is one which is of squamous cell histology . Rest 3 have squamous cell carcinoma in even less than 5 - 6 of cases. Stomach --- MC is Adenocarcinoma 95 Pancreas -- MC is Duct cell adenocarcinoma 85 - 90 Breast -- Intraductal adenocarcinoma 85 