Tattoo sign (mammogram)
The tattoo sign is a feature given to describe dermal calcifications seen on mammography 1. The basis of this sign is that dermal calcifications maintain fixed relationships to one another which are reproducible with similar projections at different times. This is in contrast to intramammary calcifications in which the relationship of the calcifications to one another can change as the tissue is compressed 2.
Dermal calcification has certain characteristics such as lucent centres, polygonal or spherical shape, the presence of tattoo sign and peripheral location of the calcification. At times, aforementioned features, the tattoo sign may be the only finding.
- 1. Loffman Felman RL. The tattoo sign. Radiology. 2002;223 (2): 481-2. doi:10.1148/radiol.2232000107 - Pubmed citation
- 2. Homer MJ, D'Orsi CJ, Sitzman SB. Dermal calcifications in fixed orientation: the tattoo sign. Radiology. 1994;192 (1): 161-3. Pubmed citation
- 3. Ellen Shaw De Paredes. Atlas of Mammography. ISBN: 0781764335
- 4. Cecilia M Brennecke. Breast Imaging: Case Review Series. ISBN: 0323091636