The "Honda sign" (H-pattern[1]) is a radiologic sign seen in case of sacral insufficiency fracture in bilateral sacral insufficiency fractures on a radioisotope bone scan.[2] It gets its name because the shape observed resembles the logo of the Honda motor company, resembling the alphabet "H".

Description

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This sign is typically associated with bilateral fractures of the superior and inferior pubic rami. In simpler terms, it indicates a specific pattern of pelvic fractures where both the upper and lower parts of the pubic bones are fractured on both sides.[2]

While Honda sign is diagnostic of sacral insufficiency fracture, it is visible in only up to 40% of the cases.[3]

References

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  1. ^ Lapina, Oksana; Tiškevičius, Sigitas (1 January 2014). "Sacral insufficiency fracture after pelvic radiotherapy: A diagnostic challenge for a radiologist". Medicina. 50 (4): 249–254. doi:10.1016/j.medici.2014.09.006. ISSN 1010-660X. PMID 25458963. Retrieved 12 November 2023.
  2. ^ a b Lyders, E.M.; Whitlow, C.T.; Baker, M.D.; Morris, P.P. (February 2010). "Imaging and Treatment of Sacral Insufficiency Fractures". American Journal of Neuroradiology. 31 (2): 201–210. doi:10.3174/ajnr.A1666. ISSN 0195-6108. PMC 7964142. PMID 19762463.
  3. ^ Blake, S P; Connors, A M (October 2004). "Sacral insufficiency fracture". The British Journal of Radiology. 77 (922): 891–896. doi:10.1259/bjr/81974373. ISSN 0007-1285. Retrieved 12 November 2023.