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Retroareolar masses and intraductal abnormalities detected on screening ultrasound: can biopsy be avoided?
British Journal of Radiology 2018 October
To investigate the malignancy rate of retroareolar masses and intraductal abnormalities discovered in asymptomatic females during screening whole breast ultrasound (US-S) and determine if biopsy can be avoided.
METHODS:: This is a HIPAA compliant retrospective study. Our radiology electronic medical records were searched for the phrases "retroareolar mass" or "intraductal mass" combined with "screening whole breast ultrasound" performed between 10/1/2009 and 5/30/2015. Inclusion criteria included retroareolar masses in asymptomatic females with normal mammography, mammographically dense breast tissue and imaging or biopsy follow-up.
RESULTS:: 1136 charts were reviewed. 87 BI-RADS 3 and 4 retroareolar findings were included in final analysis. The average lesion size was 9.5 mm (range 4-28 mm). 47/87 lesions were classified as BI-RADS 3 and 40/87 BI-RADS 4. Of the 47 BI-RADS 3 lesions, 36 were stable on follow-up; 6 benign lesions were biopsied at patients' request; and 5 biopsied due to suspicious interval change on follow-up imaging, including 4 benign lesions and a 5 mm Grade 2 ductal carcinoma in situ . 3/40 BI-RADS 4 lesions were not biopsied and stable at follow-up; 37/40 lesions underwent benign biopsy. The malignancy rate of BI-RADS 3 and 4 lesions was 2.1% [CI (0.4-11.1)] and 0% [CI (0.0-8.8)], respectively. The overall combined malignancy rate was 1/87 [1.1%, CI (0.2-6.2)].
CONCLUSION:: The malignancy rate for BI-RADS 3 and 4 retroareolar masses and intraductal abnormalities detected on US-S is low (<2%).
ADVANCES IN KNOWLEDGE:: Careful imaging surveillance in lieu of biopsy of these lesions may be appropriate in asymptomatic females with negative mammography.
METHODS:: This is a HIPAA compliant retrospective study. Our radiology electronic medical records were searched for the phrases "retroareolar mass" or "intraductal mass" combined with "screening whole breast ultrasound" performed between 10/1/2009 and 5/30/2015. Inclusion criteria included retroareolar masses in asymptomatic females with normal mammography, mammographically dense breast tissue and imaging or biopsy follow-up.
RESULTS:: 1136 charts were reviewed. 87 BI-RADS 3 and 4 retroareolar findings were included in final analysis. The average lesion size was 9.5 mm (range 4-28 mm). 47/87 lesions were classified as BI-RADS 3 and 40/87 BI-RADS 4. Of the 47 BI-RADS 3 lesions, 36 were stable on follow-up; 6 benign lesions were biopsied at patients' request; and 5 biopsied due to suspicious interval change on follow-up imaging, including 4 benign lesions and a 5 mm Grade 2 ductal carcinoma in situ . 3/40 BI-RADS 4 lesions were not biopsied and stable at follow-up; 37/40 lesions underwent benign biopsy. The malignancy rate of BI-RADS 3 and 4 lesions was 2.1% [CI (0.4-11.1)] and 0% [CI (0.0-8.8)], respectively. The overall combined malignancy rate was 1/87 [1.1%, CI (0.2-6.2)].
CONCLUSION:: The malignancy rate for BI-RADS 3 and 4 retroareolar masses and intraductal abnormalities detected on US-S is low (<2%).
ADVANCES IN KNOWLEDGE:: Careful imaging surveillance in lieu of biopsy of these lesions may be appropriate in asymptomatic females with negative mammography.
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