Adenocarcinoma of the uterine cervix of small intestinal type containing numerous Paneth cells.

A case of invasive adenocarcinoma of the uterine cervix with small intestinal differentiation to include numerous Paneth cells is presented. The light microscopic findings are confirmed by immunohistochemical and electron microscopic study. To our knowledge, this is only the second reported case of small intestinal cervical adenocarcinoma that contained Paneth cells and the first with ultrastructural and immunohistochemical confirmation. A small focus of in situ adenocarcinoma with similar features is seen adjacent to the invasive area.