The ultrastructure of a poorly differentiated adenocarcinoma of the human tuba uterina.

A poorly differentiated adenocarcinoma of the human oviduct was studied by light and transmission electron microscopy. Cells contained abundant mitochondria, bound and free ribosomes, prominent Golgi's bodies and aggregates of membrane-bound dense bodies. The small glandular lumina with numerous microvilli were generally devoid of cilia and contained secretory material. The neoplasm was ultrastructurally similar to poorly differentiated ovarian serous carcinomas.