Necrosis following a Breast Reduction.

I has necrosis following a Breast reduction. The doctor cut the the bad fat off and I was able to refrain from losing about 75% of my nipple. However, after many trips to the doctor and almost 4 years later, I still have a small hole in my nipple that never did close. I had white chunky substance that would come out for a while when I would squeeze it but it has not come out anymore for about 6 months or so now. My doctor is now retired. Why do I still have this hole and will it close at all?

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