Sammanfattning
Unknown primary tumour (UPT) is defined as a histologically confirmed metastatic malignancy for which no primary site has been detected. It accounts for approximately 3-5% of all malignant neoplasms. UPT represents a group of heterogeneous cancers with rapid progression and random, atypical metastases. This article describes the diagnostic strategies, treatment, prognosis and survival of patients with UPT.