Microcalcifications in the breast can be the first sign of cancer.  They are, as the name says, very small and clustered. A precise biopsy without pain under stereotactic guidance is the standard procedure. What makes this Spirotome different from the vacuum assisted biopsies is that only a few biopsies are needed and that the approach of the needle towards the microcalcifications is direct and frontal. There is no damage to the surrounding tissues making this procedure rather painfree and with minimal bleeding.