B Meshkat1, R S Prichard2, Z Al-Hilli2, G A Bass2, C Quinn3, A O'Doherty4, J Rothwell2, J Geraghty2, D Evoy2, E W McDermott2. 1. Department of Breast Surgery, St Vincent's Healthcare Group, Elm Park, Dublin 4, Ireland. Electronic address: b_meshkat@hotmail.com. 2. Department of Breast Surgery, St Vincent's Healthcare Group, Elm Park, Dublin 4, Ireland. 3. Department of Histopathology, St Vincent's Healthcare Group, Elm Park, Dublin 4, Ireland. 4. Department of Radiology, St Vincent's Healthcare Group, Elm Park, Dublin 4, Ireland.
Abstract
BACKGROUND: An association between interval breast cancers (cancer detected after a normal mammogram and before the next scheduled mammogram) and tumour aggressiveness has been postulated which may reflect their relatively poor overall prognosis. The aim of this study was to evaluate known prognostic features of screen detected breast cancers compared to interval breast cancers. METHODS: Patients diagnosed with breast cancer between January 2010 and 2013 at a single unit of the National Breast Screening Program (NBSP) in Ireland and those between the ages of 50 and 65 diagnosed at a symptomatic breast clinic were included in the study. Patients who had not had a screening mammogram within the proceeding two years or had a previous history of breast cancer were excluded. Data were retrospectively collected on patient demographics, tumour type, grade, hormone receptor status and stage of disease at presentation. RESULTS: There were 915 patients included in the study, with 92% (n = 844) diagnosed through the NBSP. Ductal carcinoma in-situ accounted for 19% (n = 160) of screen-detected breast cancers but only 2.8% of interval cancers (p < 0.05). The most common type of invasive cancer was invasive ductal carcinoma. Tumour grade was significantly higher in interval breast cancers (p < 0.05). Interval cancers were identified at a significantly higher stage (Stage 1 versus 2; p < 0.001) than screen-detected cancers. Interval breast cancers were less likely to be ER positive (76% versus 81%; p < 0.05) and significantly more likely to over-express HER2 (20% vs 10%, p < 0.05) than screen-detected cancers. CONCLUSION: This study highlights the fact that interval cancers appear to have a number of adverse prognostic markers for overall breast cancer survival when compared to women with screen-detected breast cancers. Interval cancers were more likely to be invasive, of a higher grade and stage and with a greater predominance of HER2 and triple negative molecular subtypes. Therefore this heterogeneous group of tumours may be biologically more aggressive and account disproportionately to overall breast cancer mortality.
BACKGROUND: An association between interval breast cancers (cancer detected after a normal mammogram and before the next scheduled mammogram) and tumour aggressiveness has been postulated which may reflect their relatively poor overall prognosis. The aim of this study was to evaluate known prognostic features of screen detected breast cancers compared to interval breast cancers. METHODS:Patients diagnosed with breast cancer between January 2010 and 2013 at a single unit of the National Breast Screening Program (NBSP) in Ireland and those between the ages of 50 and 65 diagnosed at a symptomatic breast clinic were included in the study. Patients who had not had a screening mammogram within the proceeding two years or had a previous history of breast cancer were excluded. Data were retrospectively collected on patient demographics, tumour type, grade, hormone receptor status and stage of disease at presentation. RESULTS: There were 915 patients included in the study, with 92% (n = 844) diagnosed through the NBSP. Ductal carcinoma in-situ accounted for 19% (n = 160) of screen-detected breast cancers but only 2.8% of interval cancers (p < 0.05). The most common type of invasive cancer was invasive ductal carcinoma. Tumour grade was significantly higher in interval breast cancers (p < 0.05). Interval cancers were identified at a significantly higher stage (Stage 1 versus 2; p < 0.001) than screen-detected cancers. Interval breast cancers were less likely to be ER positive (76% versus 81%; p < 0.05) and significantly more likely to over-express HER2 (20% vs 10%, p < 0.05) than screen-detected cancers. CONCLUSION: This study highlights the fact that interval cancers appear to have a number of adverse prognostic markers for overall breast cancer survival when compared to women with screen-detected breast cancers. Interval cancers were more likely to be invasive, of a higher grade and stage and with a greater predominance of HER2 and triple negative molecular subtypes. Therefore this heterogeneous group of tumours may be biologically more aggressive and account disproportionately to overall breast cancer mortality.
Authors: Xueying Hu; Kelly S Myers; Eniola T Oluyemi; Mary Philip; Armina Azizi; Emily B Ambinder Journal: Breast Cancer Res Treat Date: 2020-11-02 Impact factor: 4.872
Authors: Jung Sun Lee; Hyun-Ah Kim; Se-Heon Cho; Han-Byoel Lee; Min Ho Park; Joon Jeong; Heung Kyu Park; Minkyung Oh; Onvox Yi Journal: Asian Pac J Cancer Prev Date: 2019-06-01
Authors: Marta Hernández-García; Ana Molina-Barceló; Mercedes Vanaclocha-Espi; Óscar Zurriaga; Beatriz Pérez-Gómez; Nuria Aragonés; Pilar Amiano; Jone M Altzibar; Gemma Castaño-Vinyals; María Sala; María Ederra; Vicente Martín; Inés Gómez-Acebo; Carmen Vidal; Adonina Tardón; Rafael Marcos-Gragera; Marina Pollán; Manolis Kogevinas; Dolores Salas Journal: Cancer Causes Control Date: 2021-11-24 Impact factor: 2.506