CEACAM5 and cholangiocarcinoma: Additionally, many malignant neoplasms are associated with elevated CEA levels, including malignancies of the colon, rectum, ovaries, uterus, lungs, esophagus, stomach, small intestine, liver, pancreas, breasts, spinal cord, and also osteosarcoma, retinoblastoma, multiple myeloma, lymphoma, malignancies of the urinary bladder and urinary tract, renal cell carcinoma and finally CCA.