Symptoms and causes

What is it?

The medical term for a tumour that has spread (metastasis) without knowing which organ the cancer came from, is 'primary unknown cancer'.

Some cancer tissues are so unrecognisable that, even after pathological and genetic testing, no further indication exists.

Diagnosis and treatment


In the majority of cases, such untraceable metastases are treated with chemotherapy.

Treatment centres and specialisations

Integrated Cancer Centre in Ghent

Latest publication date: 21/01/2021