Collocations for tumour - noun

cancerous, malignant
benign
primary
inoperable
brain, breast, kidney, etc.

diagnose
remove
shrink
treat
develop
He developed a brain tumour.

cell, tissue
formation, growth

tumour in
a primary tumour in the breast

tumour of
tumors of the central nervous system

tumour on
a malignant tumour on the eyelid

Tumour/tumor is used after these nouns:
brain, breast, lung