Adenocarcinoma[1] (/ˌædɪnoʊkɑːrsɪˈnoʊmə/; plural adenocarcinomas or adenocarcinomata /ˌædɪnoʊkɑːrsɪˈnoʊmɪtə/) (AC) is a type of cancerous tumor that can happen in several parts of the body. It mainly happens in the glandular area.