RT Journal Article SR Electronic T1 Storiform collagenoma as a clue for Cowden disease or PTEN hamartoma tumour syndrome JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 840 OP 842 DO 10.1136/jcp.2005.033621 VO 60 IS 7 A1 W I Al-Daraji A1 H M Ramsay A1 R B M Ali YR 2007 UL http://jcp.bmj.com/content/60/7/840.abstract AB