51.   Scientists at Stanford University and elsewhere have gained an important insight into the basic biology that underlies the evolution of cancerous tumors.

52.   She underwent surgery Thursday to remove a cancerous tumor in her stomach. . . .

53.   She underwent surgery to remove the cancerous tumor and several rounds of chemotherapy, in which her shoulder-length hair fell out, leaving her bald.

54.   She had been a registered nurse, and knew that cysts are usually liquid while cancerous tumors are usually solid.

55.   Special Agent Dana Scully is not suffering from brain cancer, as I wrote, but from a cancerous tumor in her nasal passage.

56.   Strawberry underwent surgery to remove a cancerous tumor from his colon on Saturday.

57.   Studies have shown that although radiation may shrink the size of the cancerous tumors, it poses special risks, especially for children under one.

58.   The discovery is expected initially to help researchers create drugs to shrink cancerous tumors or shut off the enzyme that triggers cancer.

59.   The doctor suspected cancerous tumors behind the eyes.

60.   The eight other compounds are aimed at slowing the growth of cancerous tumors and preventing their spread.