MKI67 and colorectal cancer: The correlation between 18F-FDG and Ki-67 was highly significant in TETs, significant in GISTs, moderate in lung, breast, bone and soft tissue, pancreatic, oral, thoracic, uterine, and ovary cancers, average in brain, esophageal and colorectal cancers, and poor in head and neck, thyroid, gastric and malignant melanoma tumors.