72-year-old female with elevated levels of the tumour marker CA 19-9 but none of the diagnostic tests showed any tumour finding. The levels of CA 19-9 remained in the pathologic range, although with decreasing values. Currently, the patient is not reporting any significant symptoms.

39-year-old male was diagnosed to have a neuroendocrine tumour with synchronic liver metastases. The disease was treated with an etoposide-carboplatin combination, Interferon A, somatostatin analogue and Zebra fish egg derived dietary supplements. In early 2008, a tumour progression was noted in that the disease started to produce the epithelial tumour markers CEA and CA 19-9.