Leader

Preoperative assessment of prognostic factors in breast cancer

H Denley¹, S E Pinder¹, C W Elston¹, A H S Lee¹ and I O Ellis¹

¹ Department of Histopathology, Nottingham City Hospital NHS Trust, Hucknall Road, Nottingham NG5 1PB, UK

Correspondence to:
Dr Denley helen.denley{at}nottingham.ac.uk

The adoption of preoperative diagnostic strategies involving fine needle aspiration cytology (FNAC) or core biopsy is well established, allowing the planning of operating lists and bed occupancy and patient involvement in therapeutic management. In addition to diagnosis, however, pathologists are increasingly being asked to provide pathological prognostic information from preoperative samples. This leader describes techniques for predicting prognosis and response to treatment on these specimens and some of the problems inherent in the determination of prognosis on small samples. For example, although histological grade can be assessed relatively reliably on either core or FNAC samples, the evaluation of tumour type (which includes an overall assessment of the architecture of a given tumour) may be less reliable on small preoperative samples. Other well recognised histological prognostic factors, such as vascular channel invasion or tumour size, cannot be determined accurately on small preoperative samples. For those patients who might benefit from neoadjuvant treatment, predicting the response to such treatments—for example, by the assessment of oestrogen receptor status—can readily be performed on either core biopsy or FNAC. In the future, other molecular markers such as C-erbB-2 might also prove beneficial in predicting response to newly developed treatments.

Key Words: breast cancer • fine needle aspiration cytology • needle core biopsy • tumour grade

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