Cystadenocarcinoma is a type of cancer that originates in glandular tissue, often found in organs such as the ovaries or pancreas. It is characterized by the presence of cysts, which are fluid-filled sacs, and malignant cells. This cancer can be aggressive and may spread to other parts of the body if not detected early. Diagnosis typically involves imaging tests like CT scans or MRI, along with a biopsy to confirm the presence of cancerous cells. Treatment options may include surgery, chemotherapy, or radiation therapy, depending on the stage and location of the tumor. Early detection is crucial for improving outcomes.