MSH: An adenocarcinoma characterized by the presence of varying combinations of clear and hobnail-shaped tumor cells. There are three predominant patterns described as tubulocystic, solid, and papillary. These tumors, usually located in the female reproductive organs, have been seen more frequently in young women since 1970 as a result of the association with intrauterine exposure to diethylstilbestrol. (From Holland et al., Cancer Medicine, 3d ed),NCI: A rare type of tumor, usually of the female genital tract, in which the insides of the cells look clear when viewed under a microscope.,NCI: A malignant neoplasm comprising glandular epithelial clear cells.,NCI: A malignant neoplasm composed of glandular epithelial clear cells. Various architectural patterns may be seen, including papillary, tubulocystic, and solid.