<prompt> Most common site for squamous cell carcinoma esophagus is:Upper thirdMiddle thirdLower thirdGastro-esophageal junction  <response>: Answer is B Middle 13rd The most common site of squamous cell carcinoma of esophagus is middle 13rd. Site of squamous cell carcinoma Percentage of total Upper 13rd 20 Middle 13rd 50 Lower 13rd 30 