J Stahlschmidt1, J Liston, M M Aslam, P J Carder. 1. Department of Histopathology, St James's University Hospital, Beckett Street, Leeds, UK; Leeds/Wakefield Breast Screening Unit, Seacroft Hospital, Leeds, UK; Department of Histopathology, Pinderfields & Pontefract Hospitals, Northgate, Wakefield, UK.