Axillary lymph node "bubbly" calcifications and body tattoo: A case series and proposed algorithm to minimize lymph node biopsies.

The presence of mammographically evident hyperdense foci within axillary lymph nodes elicits concern for calcium deposits, which in turn have a wide differential diagnosis including both benign and malignant entities. Tissue sampling, most commonly by way of image-guided core needle biopsy, is needed in many cases when a definite etiology cannot be clinically established. In this case series we present history, imaging findings, and pathology results (or long term follow-up stability as biopsy surrogate) of several women with body tattoos who at mammography were noted to have a characteristic pattern of "bubbly" pseudo-calcifications within axillary lymph nodes, and absence of other mammographic, sonographic and clinical abnormalities.