Second non-breast primary cancer following adjuvant therapy for early breast cancer: a report from the International Breast Cancer Study Group.
The incidence of second non-breast primary cancer following adjuvant treatment was evaluated using data from patients enrolled from 1978 to 1999 in four International Breast Cancer Study Group (IBCSG) trials. The occurrence of these tumours as sites of the first failure was assessed separately for two treatment comparisons: toremifene versus tamoxifen for 5 years in 1035 patients in IBCSG Trials 12-93 and 14-93 with a median follow-up of 8 years and endocrine therapy (toremifene or tamoxifen) versus chemo-endocrine therapy (CMF or AC plus toremifene or tamoxifen) in 1731 patients from IBCSG Trials III, VII and 12-93, with a combined median follow-up of 14 years. No significant differences in second non-breast primary tumours were observed in either comparison. In particular, the incidences of second primary uterine tumours with toremifene and tamoxifen were similar and no significant increase of secondary leukaemias was observed with chemo-endocrine therapy compared with endocrine therapy.
Gianni
Lorenzo
L
Department of Oncology, Ospedale Infermi, Rimini and Istituto Scientifico Romagnolo per lo Studio e Cura dei Tumori, Meldola (FC), Italy. lgianni@auslrn.net
Gelber
Shari
S
Ravaioli
Alberto
A
Price
Karen N
KN
Panzini
Ilaria
I
Fantini
Manuela
M
Castiglione-Gertsch
Monica
M
Pagani
Olivia
O
Simoncini
Edda
E
Gelber
Richard D
RD
Coates
Alan S
AS
Goldhirsch
Aron
A
D000328:Adult; D018931:Antineoplastic Agents, Hormonal / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000601:surgery; D017024:Chemotherapy, Adjuvant / Q000009:adverse effects; D015331:Cohort Studies; D003520:Cyclophosphamide / Q000008:administration & dosage / Q000009:adverse effects; D005260:Female; D006801:Humans; D008197:Lymph Node Excision; D008207:Lymphatic Metastasis; D008408:Mastectomy; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000139:chemically induced*; D016019:Survival Analysis; D013629:Tamoxifen / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use; D017312:Toremifene / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use
D018931:Antineoplastic Agents, Hormonal; D013629:Tamoxifen; D017312:Toremifene; D003520:Cyclophosphamide