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17

NCCN Guidelines for Patients

®

:

Waldenström’s Macroglobulinemia, Version 1.2017

2

Testing for WM

Imaging tests

A CT of the chest, abdomen, and pelvis is the most

common imaging test for WM.

See Figure 3

. A PET

scan or MRI may only be done in certain situations.

For example, if Bing-Neel syndrome is suspected

you may have an MRI of the brain and spinal cord.

This syndrome is rare and affects the central nervous

system. It is caused by WM.

See Guide 3

.

You will be asked to do certain things before your

imaging test. You may need to stop drinking or eating

for several hours before certain tests. For an MRI,

you will be asked to remove any metal objects (like

jewelry) on your body. Let the doctor know if you

have any metal objects implanted in your body (for

example, artificial joints, stents, or pacemakers) as

this may also interfere with the MRI.

You will be asked to lie down on a table for an

ultrasound, MRI, CT, or PET. A PET and CT may

be done together. This is called a PET/CT (

p

ositron

e

mission

t

omography

/c

omputed

t

omography)

scan.

This allows your doctors to view the shape and

function of organs and tissues.

Tell the doctor if you are allergic to the dye. The dye

is called contrast. Let the doctor know if you have

any concerns about the machine being used. Ask

questions about the test so you can be prepared.

Keep in mind, you will have to wait for the results.

The pictures made during imaging tests need to be

reviewed by a radiologist.

A radiologist is a doctor

who’s an expert in reading imaging tests.

He or

she will provide your doctors with a report on what

the tests show.

It may take several days to get this

report.

Figure 3

CT scan machine

A CT machine is large and has a

tunnel in the middle. During the

test, you will lie on a table that

moves slowly through the tunnel.