Final answer:
Endometrial cancer commonly involves abnormal glandular epithelial cells with features like enlarged nuclei and hyperchromasia when viewed through a microscope.
Step-by-step explanation:
The most common cell types in endometrial cancer (endometrial carcinoma) include various forms of glandular epithelial cells, which exhibit changes such as being larger and often having abnormal nuclei. These abnormal changes are indicative of cancerous transformation from the normal high degree of organization among different types of cells in the tissue of the cervix. When viewed through a light microscope, such as in a Pap smear test, normal cervical cells exhibit a regular, organized appearance. In contrast, cancerous cells can show features like enlarged nuclei, hyperchromasia (darkly stained nuclei), and increased nuclear-to-cytoplasmic ratio. These changes highlight the breakdown of regular mitotic functioning of a cell, which is a hallmark of cancer.