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Complex Cysts
Questions about complex breast cysts.
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AskedPublicly Submitted Question
9/13/2017I have been having unilateral breast swelling for almost 5 months. I had a MRI that showed multiple T2 weighted cystic masses most likely representing cysts. At the follow-up ultrasound they noted:
In the retroareolar region of the left breast there is an ovoid hypoechoic lesion likely representing a complex cyst measuring 1.1 x 0.4 x 0.9 cm without discernible flow. Adjacent to this, there is a bilobed cyst or cluster of cysts measuring collectively 0.9 x 0.4 x 0.5 cm. In the 2:00 position 6 cm from the nipple there is a hypoechoic irregular lesion measuring 0.9 x 1.0 x 0.6 cm without discernible vascular flow.
I had all 4 complex cysts drained and the fluid was sent to cytology. The results are still pending at the radiologists. The retroaerolar cyst has already either refilled or a hematoma may have formed. The nipple area has become very tender (not hormone related) but there is no redness or signs of infection.
Can a complex cyst contain malignant cells even after a negative mammogram, MRI and Birads3 ultrasound?

RepliedJHU's Breast Center Reply
9/13/2017a complex cyst can contain malignant cells however it usually can be figured out before a biopsy or even fluid aspiration is done because the borders of the cyst will look irregular. a cyst would not refill in a day or two either so likely a hematoma.

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