Diagnostic tests
In addition to the usual blood tests, all day urine samples are collected for
catecholamine measurement to support the diagnosis. A bone marrow biopsy is
done to evaluate metastatic involvement. Ultrasound studies and a computerized
tomography (CT) scan of the abdomen or the chest help to locate the site of
the tumour and examine the involvement of the surrounding tissues. These tests
are also used to assess the extent of tumour spread. Sometimes special tests
such as isotope scans are helpful in confirming the diagnosis.