M.C. site of CA oesophagus is -

Esophageal Carcinoma is of two common histological types Squamous cell Ca - the MC type in the world (-95% according to Sabiston) Adenocarcinoma - where incidence is increasing at a rapid rate and is now the MC type in the USA (Ref:• Harrison, Schwartz) Distribution of Squamous Cell Ca. Upper 1/3 → 10% Middle 1/3 → 60% Lower 1/3 → 30%      Adenocarcinoma is mainly located in lower 1/3. Nowhere, I could get the MC site of esophageal carcinoma overall (including both squamous and adeno variety). But one thing is sure - squamous cell Ca is the MC type of esophageal cancer in the world So I presume that the overall MC site would be the MC site involved by the MC type of esophageal cancer i.e. → Middle 1/3 So remember MC type of esophageal Ca in world → Squamous Cell Ca (-95%) MC site → Middle 1/3