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Malawi Medical Journal
College of Medicine, University of Malawi and Medical Association of Malawi
ISSN: 1995-7262
Vol. 30, No. 1, 2018, pp. 13-16
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Bioline Code: mm18003
Full paper language: English
Document type: Research Article
Document available free of charge
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Malawi Medical Journal, Vol. 30, No. 1, 2018, pp. 13-16
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Relationship between tumour size and response to neoadjuvant chemotherapy among breast cancer patients in a tertiary center in Nigeria
Olatoke, Samuel; Agodirin, Olayide; Rahman, Ganiyu; Habeeb, Olufemi & Akande, Halimat
Abstract
Background Tumour biology, physiologic features such as growth fraction and physical features such as size may influence response of breast
cancer to neoadjuvant chemotherapy. Molecular biology is an established basis for predicting response and selecting neoadjuvant
chemotherapy. Whether physical characteristics such as size should influence chemotherapy regimen is inconclusive and has not been
adequately studied in developing countries.
Aim
To determine the relationship between breast tumour size and response to neoadjuvant chemotherapy and hence define the role of
tumour size during selection of neoadjuvant chemotherapy regimen for locally advanced breast cancer.
Method: Records of women managed at the University of Ilorin Teaching Hospital, Ilorin Nigeria, with neoadjuvant chemotherapy
(NAC) for locally advanced breast cancer were reviewed between January 2013 and June 2015. Data was analyzed as 2 subgroups;
primary tumour ≥100 mm as group 1 and primary tumour ≥100mm as group 2. Primary outcome was 50% reduction in tumour size.
Comparison was by chi-square test of independence at p value 0.05.
Results 57 records were reviewed (group1=24, group2=33). Majority (37( 65%)) were premenopausal. Mean age was 47.9 ± 13.1 (range 28-85).
NAC was either taxane or anthracycline based regimen. Median chemotherapy dose was 4 (range 2-6). Widest diameter of tumours was
30mm to 180mm (mean 96 ±3.8mm, median 100mm). Mean tumour diameter for groups 1 and 2 was 7.2 ±1.6mm and 12.2± 2.9mm
respectively. 50% reduction in tumour size was 45.8% and 6.0% for groups 1 and 2 respectively (p=0.0001)
Conclusion
There was relationship between breast tumour size and response to neoadjuvant chemotherapy at a cut-off of 10mm. Well-designed
prospective studies are required to confirm this relationship.
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