polka-dot sign

Polka dot

sign (vertebral hemangioma) • Vertebral hemangioma - Ganzer Fall bei Radiopaedia

Rasuli, B. Vertebral hemangioma. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-84643 • CC by-nc-sa 3.0 (modified)

Polka dot

sign (vertebral hemangioma) • Polka-dot pattern - Ganzer Fall bei Radiopaedia

Schubert, R. Polka-dot pattern. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-14675 • CC by-nc-sa 3.0 (modified)

Polka dot

sign (vertebral hemangioma) • Polka-dot sign - intraosseous vertebral hemangioma - Ganzer Fall bei Radiopaedia

Niknejad, M. Polka-dot sign - intraosseous vertebral hemangioma. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-32548 • CC by-nc-sa 3.0 (modified)

Corduroy sign

(vertebral hemangioma) • Vertebral hemangioma - Ganzer Fall bei Radiopaedia

Gaillard, F. Vertebral hemangioma. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-7483 • CC by-nc-sa 3.0 (modified)

Corduroy sign

(vertebral hemangioma) • Polka-dot sign and corduroy sign - intraosseous vertebral hemangioma - Ganzer Fall bei Radiopaedia

Niknejad, M. Polka-dot sign and corduroy sign - intraosseous vertebral hemangioma. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-21327 • CC by-nc-sa 3.0 (modified)

Corduroy sign

(vertebral hemangioma) • Polka dot sign and corduroy sign-vertebral hemangioma - Ganzer Fall bei Radiopaedia

Niknejad, M. Polka dot sign and corduroy sign-vertebral hemangioma. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-61295 • CC by-nc-sa 3.0 (modified)

Aggressive

vertebral hemangioma • Aggressive spinal hemangioma - Ganzer Fall bei Radiopaedia

Gaillard, F. Aggressive spinal hemangioma. Case study, Radiopaedia.org. (accessed on 21 Oct 2022) https://doi.org/10.53347/rID-4624 • CC by-nc-sa 3.0 (modified)

Radiopaedia • CC-by-nc-sa 3.0 • de

The polka-dot sign is the result of the replacement of the normal cancellous bone by thickened vertical trabeculae surrounded by fat marrow or vascular lacunae in vertebral intraosseous hemangiomas . It is the axial equivalent of the corduroy sign seen on sagittal and coronal images. On CT the dots are white on a black fatty background, whereas on MRI they are black dots on a white background (on non-fat-suppressed T1 or T2-weighted images).

History and etymology

Polka dots refer to a clothing pattern consisting of equally sized and spaced filled circles. It is generally confined to casual wear e.g. bathing suits and lingerie .