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Table 2 Histology of breast metastases

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

Primary histology Number of patients (%) Interval (months): primary-secondary (mean)
Lymphoma 18 (38.3 %)  
 Primary 13  
 Secondary 5 5–64 (24)
Melanoma 11 (23.4 %)  
 No primary site 3  
 Primary side detected 8 4–273 (66)
Ovarian carcinoma 6 (12.8 %)  
 No history of ovarian carcinoma 1  
 History of ovarian carcinoma 5 1–43 (15)
Lung carcinoma 6 (12.8 %)  
 No history of lung carcinoma 4  
 History of lung carcinoma 2 10–28 (19)
Adenocarcinoma of the colon 3 (6.4 %)  
 No history of colon carcinoma 1  
 History of colon carcinoma 2 1–5 (3)
Renal cell carcinoma 1 (2.1 %)  
 No history of renal cell carcinoma 0  
 History of renal cell carcinoma 1 2 (−)
Adenocarcinoma of the stomach 1 (2.1 %)  
 No history of stomach carcinoma 1  
 History of stomach carcinoma 0
Choriocarcinoma 1 (2.1 %)  
 No history of choriocarcinoma  1  
 History of choriocarcinoma  0
Total 47 (100 %)