Interpreting MRI report

Hello all,

I had a mammogram showing architectural distortion. Ultrasound didn't show anything, but MRI was rated BIRADS 4 (linear non-mass enhancement). I had the MRI-guided biopsy yesterday, and the results read (in part):

"There is linear non-mass enhancement at 3 o'clock, lower inner quadrant that extends to the lower outer quadrant and to the nipple areolar complex, with heterogeneous internal enhancement measuring 36 x 17 x 16 mm (AP x SI x ML). This finding corresponds to the area of architectural distortion seen on mammogram. Computer aided evaluation of the enhancement kinetics demonstrates initial phase worst curve enhancement is fast 91%, and delayed phase worst curve enhancement is washout 5%."

I found a paper which reads "Early enhancement (2 minutes after agent injection), during which the initial rise of the enhanced curve can be divided into "slow", "medium", and "rapid". An initial peak signal intensity within 90 seconds >90% is defined as rapid enhancement, which is highly suggestive of malignancy".

So it sounds like that fast 91% enhancement is pretty bad? I'm not sure how to interpret the washout number. I'm obviously pretty scared.