RT Journal Article SR Electronic T1 Colon Neoplastic Cells Do Not Originate from Bone Marrow-derived Cells after Sex-mismatched Bone Marrow Transplantation JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 4097 OP 4103 VO 32 IS 9 A1 SAKAI, GEN A1 YAJIMA, TOMOHARU A1 TAKAISHI, HIROMASA A1 MORI, TAKEHIKO A1 HIGUCHI, HAJIME A1 NAKAMURA, SHOKO A1 FUNAKOSHI, SHINSUKE A1 ADACHI, MASAYUKI A1 IZUMIYA, MOTOKO A1 AKAGI, HIDEKO A1 HAMAMOTO, YASUO A1 KANAI, TAKANORI A1 MUKAI, MAKIO A1 OKAMOTO, SHINICHIRO A1 HIBI, TOSHIFUMI YR 2012 UL http://ar.iiarjournals.org/content/32/9/4097.abstract AB Background: Although previous studies indicate that gastrointestinal (GI) cancer may originate from cells recruited from bone marrow (BM) in mice, whether similar phenomena occur in humans is controversial. In the current study, we evaluated two female patients who developed colonic adenocarcinoma more than 10 years after gender-mismatched BM transplantation, and followingly underwent successful endoscopic mucosal resection. Materials and Methods: Fluorescent in situ hybridization (FISH) analysis was used to determine whether the tumours contained donor-derived BM cells. Results: Approximately 1.2% of the tumour cells contained Y-chromosome-positive signals, and a comparable percentage of normal colonic epithelial cells close to the tumour also contained Y-chromosome-positive signals. Conclusion: These results do not support the concept that GI cancer can originate from BM-derived cells.