Free laminin in the extracellular matrix of B-cell non Hodgkin's lymphomas.

The authors show that in the perivascular stroma of B-cell non-Hodgkin's lymphomas (B-NHL) is present a granular, speckled pattern of expression of laminin, similar to the 'free-laminin' firstly described by Lugassy et al. (1997) in human melanoma. The role of this form of laminin may be to promote the migration of tumor cells, which express a variety of binding-laminin surface proteins, whose expression is significantly increased in several human cancer models.