Prospective study of outcomes in sporadic versus hereditary breast cancer (POSH): Study protocol

Eccles, D, Gerty, S, Simmonds, P, Hammond, V, Ennis, S, Altman, DG and POSH Steering Group (2007) Prospective study of outcomes in sporadic versus hereditary breast cancer (POSH): Study protocol. BMC Cancer, 7 1-6. doi:10.1186/1471-2407-7-160

Author Eccles, D
Gerty, S
Simmonds, P
Hammond, V
Ennis, S
Altman, DG
POSH Steering Group
Title Prospective study of outcomes in sporadic versus hereditary breast cancer (POSH): Study protocol
Journal name BMC Cancer   Check publisher's open access policy
ISSN 1471-2407
Publication date 2007-08-01
Sub-type Article (original research)
DOI 10.1186/1471-2407-7-160
Open Access Status DOI
Volume 7
Start page 1
End page 6
Total pages 6
Place of publication London, United Kingdom
Publisher BioMed Central
Language eng
Formatted abstract
Background: Young women presenting with breast cancer are more likely to have a
predisposition to the disease than breast cancer patients in general. A genetic  predisposition is known to increase the risk of new primary breast (and other) cancers. It is unclear from the literature whether genetic status should be taken into consideration when planning adjuvant treatment in a young woman presenting with a first primary breast cancer. The primary aim of the POSH study is to establish whether genetic status influences the prognosis of primary breast cancer independently of known prognostic factors.

Methods/design: The study is a prospective cohort study recruiting 3,000 women aged 40 years or younger at breast cancer diagnosis; the recruiting period covers 1st June 2001 to 31st December 2007. Written informed consent is obtained at study entry. Family history and known epidemiological risk data are collected by questionnaire. Clinical information about diagnosis, treatment and clinical course is collected and blood is stored. Follow up data are collected annually after the first year. An additional recruitment category includes women aged 41 to 50 years who are found to be BRCA1 or BRCA2 gene carriers and were diagnosed with their first breast cancer during the study recruiting period.

Discussion: Power estimates were based on 10% of the cohort carrying a BRCA1 gene mutation. Preliminary BRCA1 and BRCA2 mutation analysis in a pilot set of study participants confirms we should have 97% power to detect a difference of 10% in event rates between gene carriers and sporadic young onset cases. Most of the recruited patients (>80%) receive an anthracycline containing adjuvant chemotherapy regimen making planned analyses more straightforward.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Medicine Publications
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