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Tam O'Shanter sign

Dr MT Niknejad and Dr Frank Gaillard et al.

The Tam O'Shanter is a Scottish hat (named after the character in Robert Burn's ¹poem of the same name).The appearances of advanced Paget's disease of the skull are similar.

Other Paget's disease related signs

Other inanimate object inspired signs.

References

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1. Smith SE, Murphey MD, Motamedi K et-al. From the archives of the AFIP. Radiologic spectrum of Paget disease of bone and its complications with pathologic correlation. Radiographics. 2002;22 (5): 1191-216. Radiographics (full text) - Pubmed citation
2. Richards PS, Bargiota A, Corrall RJ. Paget's disease causing an Arnold-Chiari Type 1 malformation: radiographic findings. AJR Am J Roentgenol. 2001;176 (3): 816-7. doi:10.2214/ajr.176.3.1760816 - Pubmed citation