My daughter has grade 2 dcis, .4cm. just diagnosed. has slightly enlarged lymph nodes. can this be connected to dcis?

Enlarged after bx?: Dcis by definition has not yet developed the potential for metastatic spread (nodes or elsewhere). If the diagnosis is based on a needle/core biopsy alone, there could actually be invasive disease (i.e. Sampling error). More likely, if the nodes were only noted after the biopsy, they may simply reactive - normal healing immune response to the invasive procedure.