"cancerous lesions" refers to abnormal growths or sores in the body caused by cancer cells. These lesions can be spotted during medical tests and are often the first sign of cancer. Full definition
It is, however, important to take your dog in for regular checkups due to the prevalence of cancerous lesions in the breed, and to monitor for other health problems. (dogs.animal-world.com)
But instead of the large cancerous lesion in Matzke's lung, he saw... nothing. (discovermagazine.com)
The increase could be caused by cancerous lesions on your cervix, says Dr. Reed. (health.com)