7 doctors weighed in:

I've developed a second breast lump in a matter of days. Is it likely to be cancer?

7 doctors weighed in
Dr. Barry Rosen
Surgery
3 doctors agree

In brief: No

I guess my first question is, what was the first lump? In general, a new lump that appears to develop "overnight" is often a breast cyst, a fluid filled lump that develops after a duct becomes blocked.
It is almost impossible to distinguish a cyst from a cancer by exam alone; an ultrasound can determine this easily. Regardless, any new lump in the breast warrants physician evaluation.

In brief: No

I guess my first question is, what was the first lump? In general, a new lump that appears to develop "overnight" is often a breast cyst, a fluid filled lump that develops after a duct becomes blocked.
It is almost impossible to distinguish a cyst from a cancer by exam alone; an ultrasound can determine this easily. Regardless, any new lump in the breast warrants physician evaluation.
Dr. Barry Rosen
Dr. Barry Rosen
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Dr. Travis Kidner
Surgery - Oncology
1 doctor agrees

In brief: See your doc

You should alert your friend primary care physician as to any changes you detect in your breasts.

In brief: See your doc

You should alert your friend primary care physician as to any changes you detect in your breasts.
Dr. Travis Kidner
Dr. Travis Kidner
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Dr. Larry Grissom
Radiology

In brief: No

Lumps arising rapidly may be cysts or hematomas (blood containing masses such as after trauma or a biopsy).

In brief: No

Lumps arising rapidly may be cysts or hematomas (blood containing masses such as after trauma or a biopsy).
Dr. Larry Grissom
Dr. Larry Grissom
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