calcifications - location question

I just received my report from my mammogram and ultrasound.  They describe:

Views of the left breast demonstrate a more focal cluster of tightly grouped amorphous calcifications located in the upper, slightly inner, posterior thrid, 17mm in extent which appear increased in number.  Adjacent, benign appearing dependent calcifications characteristic of milk of calcium are again noted.

My question is: does this sound bad?  I have had some calcifations for years but it looks like there are more of them now.  Also, where is the "posterior third" on the breast, so I can figure out where this calcification is located.  

My biopsy is scheduled for July 16.

Thanks so much!

[japdip]

When calcifications are observed in clusters or groupings they do require a biopsy to determine the cause. When they group like this they are an indication that the breast is reacting to some abnormality within the breast tissue but not necessarily cancer. The posterior third would I imagine refer to the area closer to the chest wall than to the surface of the breast. Good luck with your biopsy on the 16th.     Regards ....