1. Management of the patient with cancer of unknown primary site;Ultman,1982
2. Metastatic cancer without a detectable primary site;Smith;J Surg,1967
3. Metastases from undetected primary cancer-Clinical experience at a radiation oncology center;Richardson;West J Med,1975
4. Metastatic and histologic presentation in unknown primary cancer;Nystrom;Semin Oncol,1977
5. The role of the pathologist in the evaluation of poorly differentiated neoplasma;Mackey;Semin Oncol,1982