Letter: In Brief

Sir: Some breast implants contain a silicon device which can be read by an external scanner. This can be used to access details of the implant itself and its date of implant from a central database. Professor Warwick ("Professor has world's first silicon chip implant", 26 August) is therefore far behind women who have had these implants introduced into their bodies. I, personally, am about 14 months ahead of him.

SARAH MARR

Chesham, Buckinghamshire

http://www.seraph.org