Objective To analyze expression levels of helper and regulatory T cells in peripheral blood in the patients with invasive micropapillary carcinoma( IMPC). Methods A total of 21 IMPC patients were consecutively selected from January to December,2012. All cases were detected for regulatory T( Treg) cells( CD4CD25+Treg and CD4+CD+Foxp325+ Treg) and helper T cells( CD+3,CD+4,CD+8,CD+4/CD+ 8) in the peripheral blood and lesion supernatant with flow cytometry. The results were compared with those of 24 patients w...