Bowel cancer:

Bowel cancer – also known as
colorectal cancer or colon cancer – is
any cancer that affects the colon
(large bowel) and rectum (back
passage).


A NEW 5 MINUTE TEST FOR BOWEL
CANCER TO CUT RISK
A new five-minute screening test is set
to cut the risk of bowel cancer by a
third and save thousands of lives.
The Flexi-Scope relays images of the
bowel lining to a screen and allows
doctors to detect and remove polyps
on the bowel wall before they develop
into cancer.


SIRT TARGETS TUMORS WITH
RADIOACTIVE MICROSPHERES
Selective Internal Radiation Spheres
(SIRT), from an Australian company,
targets tumors with radioactive  
microspheres.

SIRT stands for Selective Internal
Radiation Therapy. It is a new way of
using radiotherapy to treat liver
cancers that can’t be removed with
surgery. SIRT is internal radiotherapy,
which is also called brachytherapy.
Your doctor inserts a thin tube called a
catheter into the hepatic artery. This is
the main artery that supplies blood to
the liver. They then send tiny beads
called microspheres down the catheter
and they get stuck in the small blood
vessels around the tumour. The
microspheres contain a radioactive
substance which give a dose of
radiation to the tumour. The
microspheres are also called ‘SIR-
spheres’, and the radioactive
substance is called ‘yttrium 90’.

How SIRT works
The radiation from the microspheres
damages the tumors’ blood supply, so
the tumours can’t get the nutrients
they need. This process is sometimes
called radioembolization. The radiation
also damages the DNA of the cancer
cells, which stops the cancer cells
growing.

The microspheres give off radiation to
an area only 2 to 3mm around where
they are trapped. This means they
cause very little damage to the
surrounding healthy tissue. The
microspheres only stay radioactive for
10 to 14 days but remain in the liver
permanently. They are harmless.

Which cancers SIRT can treat:
Advanced bowel cancers that have
spread to the liver
Cholangiocarcinomas
Liver cancer
Secondary neuroendocrine tumors
that have spread to the liver
Cholangiocarcinoma is a cancer  that
affects the hepatobiliary system, which
includes the liver, gall bladder, and bile
ducts.