Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study

Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archi...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Buisman, Florian E. [verfasserIn] van Gelder, Linda Menke-Pluijmers, Marian B. E. Bisschops, Bob H. C. Plaisier, Peter W. Westenend, Pieter J.

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2016

Schlagwörter:	Breast Malignancies Metastases

Anmerkung:	© The Author(s). 2016

Übergeordnetes Werk:	Enthalten in: World journal of surgical oncology - London : Biomed Central, 2003, 14(2016), 1 vom: 23. Juni
Übergeordnetes Werk:	volume:14 ; year:2016 ; number:1 ; day:23 ; month:06

Links:	Volltext

DOI / URN:	10.1186/s12957-016-0915-4

Katalog-ID:	SPR028835875

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520			\|a Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases.
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allfields	10.1186/s12957-016-0915-4 doi (DE-627)SPR028835875 (SPR)s12957-016-0915-4-e DE-627 ger DE-627 rakwb eng Buisman, Florian E. verfasserin aut Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s). 2016 Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases. Breast (dpeaa)DE-He213 Malignancies (dpeaa)DE-He213 Metastases (dpeaa)DE-He213 van Gelder, Linda aut Menke-Pluijmers, Marian B. E. aut Bisschops, Bob H. C. aut Plaisier, Peter W. aut Westenend, Pieter J. aut Enthalten in World journal of surgical oncology London : Biomed Central, 2003 14(2016), 1 vom: 23. Juni (DE-627)369082907 (DE-600)2118383-1 1477-7819 nnns volume:14 year:2016 number:1 day:23 month:06 https://dx.doi.org/10.1186/s12957-016-0915-4 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2016 1 23 06
spelling	10.1186/s12957-016-0915-4 doi (DE-627)SPR028835875 (SPR)s12957-016-0915-4-e DE-627 ger DE-627 rakwb eng Buisman, Florian E. verfasserin aut Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s). 2016 Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases. Breast (dpeaa)DE-He213 Malignancies (dpeaa)DE-He213 Metastases (dpeaa)DE-He213 van Gelder, Linda aut Menke-Pluijmers, Marian B. E. aut Bisschops, Bob H. C. aut Plaisier, Peter W. aut Westenend, Pieter J. aut Enthalten in World journal of surgical oncology London : Biomed Central, 2003 14(2016), 1 vom: 23. Juni (DE-627)369082907 (DE-600)2118383-1 1477-7819 nnns volume:14 year:2016 number:1 day:23 month:06 https://dx.doi.org/10.1186/s12957-016-0915-4 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2016 1 23 06
allfields_unstemmed	10.1186/s12957-016-0915-4 doi (DE-627)SPR028835875 (SPR)s12957-016-0915-4-e DE-627 ger DE-627 rakwb eng Buisman, Florian E. verfasserin aut Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s). 2016 Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases. Breast (dpeaa)DE-He213 Malignancies (dpeaa)DE-He213 Metastases (dpeaa)DE-He213 van Gelder, Linda aut Menke-Pluijmers, Marian B. E. aut Bisschops, Bob H. C. aut Plaisier, Peter W. aut Westenend, Pieter J. aut Enthalten in World journal of surgical oncology London : Biomed Central, 2003 14(2016), 1 vom: 23. Juni (DE-627)369082907 (DE-600)2118383-1 1477-7819 nnns volume:14 year:2016 number:1 day:23 month:06 https://dx.doi.org/10.1186/s12957-016-0915-4 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2016 1 23 06
allfieldsGer	10.1186/s12957-016-0915-4 doi (DE-627)SPR028835875 (SPR)s12957-016-0915-4-e DE-627 ger DE-627 rakwb eng Buisman, Florian E. verfasserin aut Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s). 2016 Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases. Breast (dpeaa)DE-He213 Malignancies (dpeaa)DE-He213 Metastases (dpeaa)DE-He213 van Gelder, Linda aut Menke-Pluijmers, Marian B. E. aut Bisschops, Bob H. C. aut Plaisier, Peter W. aut Westenend, Pieter J. aut Enthalten in World journal of surgical oncology London : Biomed Central, 2003 14(2016), 1 vom: 23. Juni (DE-627)369082907 (DE-600)2118383-1 1477-7819 nnns volume:14 year:2016 number:1 day:23 month:06 https://dx.doi.org/10.1186/s12957-016-0915-4 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2016 1 23 06
allfieldsSound	10.1186/s12957-016-0915-4 doi (DE-627)SPR028835875 (SPR)s12957-016-0915-4-e DE-627 ger DE-627 rakwb eng Buisman, Florian E. verfasserin aut Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s). 2016 Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases. Breast (dpeaa)DE-He213 Malignancies (dpeaa)DE-He213 Metastases (dpeaa)DE-He213 van Gelder, Linda aut Menke-Pluijmers, Marian B. E. aut Bisschops, Bob H. C. aut Plaisier, Peter W. aut Westenend, Pieter J. aut Enthalten in World journal of surgical oncology London : Biomed Central, 2003 14(2016), 1 vom: 23. Juni (DE-627)369082907 (DE-600)2118383-1 1477-7819 nnns volume:14 year:2016 number:1 day:23 month:06 https://dx.doi.org/10.1186/s12957-016-0915-4 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 14 2016 1 23 06
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author	Buisman, Florian E.
spellingShingle	Buisman, Florian E. misc Breast misc Malignancies misc Metastases Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study
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topic_title	Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study Breast (dpeaa)DE-He213 Malignancies (dpeaa)DE-He213 Metastases (dpeaa)DE-He213
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title	Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study
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title_full	Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study
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author_browse	Buisman, Florian E. van Gelder, Linda Menke-Pluijmers, Marian B. E. Bisschops, Bob H. C. Plaisier, Peter W. Westenend, Pieter J.
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title_sort	non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study
title_auth	Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study
abstract	Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases. © The Author(s). 2016
abstractGer	Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases. © The Author(s). 2016
abstract_unstemmed	Background Breast cancer is a common malignancy, but metastases to the breast of extramammary malignancies are very rare. Treatment and prognosis are different. The aim of the study is to report the incidence of lymphomas and metastases to the breast of extramammary malignancies in our 30-year archive. Methods The pathology database of a single institute was reviewed for all breast neoplasms which were coded in our system as a metastasis in the period 1985–2014. Metastatic tumors from primary breast carcinoma were excluded. Results A total of 47 patients were included (7 men/40 women, mean age 63 years). The majority originated from lymphoma (n = 18) and primary melanoma (n = 11). Other primary tumor sites included the ovary (n = 6), lung (n = 6), colon (n = 3), kidney (n = 1), stomach (n = 1), and chorion (n = 1). In 24/47 patients (51 %), metastasis was the first sign of the specific malignant disease. In seven patients (15 %) surgery was performed, the diagnosis of metastatic disease was adjusted in four patients (9 %) postoperatively. Conclusions It is important to distinguish lymphomas and metastases to the breast from common primary breast carcinoma for proper treatment and prognosis. Therefore, we emphasize the need for a histological or cytopathological diagnosis before any treatment is commenced. The pathologist plays a key role in considering the diagnosis of metastasis if the histological features are unusual for a primary breast carcinoma. The pathologist should therefore be properly informed by the clinical physician although lymphomas and metastases to the breast are the first presentation of malignant disease in half the cases. © The Author(s). 2016
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title_short	Non-primary breast malignancies: a single institution’s experience of a diagnostic challenge with important therapeutic consequences—a retrospective study
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