“…While we found a ratio of 2/1 for SCC/AC and SCC has majority of tumors in some other reports too (from Japan (26/1) (Shibata et al, 2008) and Iran and AC are equal and even a higher rate of AC in recent decades has been recorded (Kumar, 2007;Bennett and Goldblum, 2009). Several line of studies have shown a decrease in proportion of SCC in recent decades (Devesa et al, 1998;Botterweck et al, 2000;Makhdoomi et al, 2005;Aragones et al, 2010;Gopala Krishnappa et al, 2013) but the severity varied between different countries (Triboulet and Mariette, 2008).…”