Student or Learner
''Doctors may make pictures of your brain
to see if there is a growth, a tumor, or can-
cer at an early stage of it.''
If we are talking about a scan, ''make picture'' is out of grammatical sense, right?
Doctors may perform a brain scan to see if there is a growth or tumour, or any [other] early signs of cancer.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.