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Circulating pancreatic stellate (stromal) cells in pancreatic cancer-a fertile area for novel research.

Pancreatic stellate cells (PSCs) are known to play an important role in facilitating pancreatic cancer progression-both in terms of local tumour growth as well as the establishment of metastases. We have previously demonstrated that PSCs from the primary cancer seed to distant metastatic sites. We therefore hypothesise that PSCs circulate along with pancreatic cancer cells (circulating tumour cells-CTCs) to help create a growth permissive microenvironment at distant metastatic sites. This review aims to explore the concept of circulating PSCs in pancreatic cancer and suggests future directions for research in this area.