Breast cancer and primary systemic therapy. Results of the Consensus Meeting on the recommendations for pathological examination and histological report of breast cancer specimens in the Marche Region.

: Primary systemic therapy (PST) adds some practical problems to the pathologic examination of neoplastic breast tissue obtained from patients before and after chemotherapy. Pathologists, oncologists, breast surgeons, radiotherapists and radiologists in the Marche Region held a Consensus Meeting in Ancona on May 13, 2010, in which 15 statements dealing with neoadjuvant chemotherapy were approved by all participants. The first two statements are related to the pre-PST phase and concern the technical procedures and the histological report of the core biopsy. The other statements deal with similar issues of the post-PST surgical specimen.