The authors retract the article titled “Spontaneous Human Adult Stem Cell Transformation,” which was published in the April 15, 2005 issue of Cancer Research ( 1 ). Upon review of the data published in this article, the authors have been unable to reproduce some of the reported spontaneous transformation events and suspect the phenomenon is due to a cross-contamination artifact. Five of the seven authors have agreed to the retraction of this paper.

Ricardo de la Fuente

Antonio Bernad

Department of Immunology and Oncology, Centro Nacional de Biotecnologia/Consejo Superior de Investigaciones Cientificas, UAM Campus de Cantoblanco, Madrid, Spain

Javier Garcia-Castro

Department of Immunology and Oncology, Centro Nacional de Biotecnologia/Consejo Superior de Investigaciones Cientificas, UAM Campus de Cantoblanco, Madrid, Spain

Oncology Department, Hospital Universitario del Nino Jesus, Madrid, Spain

Maria C. Martin

Juan C. Cigudosa

Cytogenetics Unit, Centro National de Investigaciones Oncological, Madrid, Spain

1
Rubio
D
,
Garcia-Castro
J
,
Martin
MC
,
dela Fuente
R
,
Cigudosa
JC
,
Lloyd
AC
,
Bernard
A
. 
Spontaneous human adult stem cell transformation
.
Cancer Res
2005
;
65
:
3035
9
.