Citation, DOI, disclosures and article data
Citation:
Luijkx T, Campos A, Elfeky M, et al. Cyma line. Reference article, Radiopaedia.org (Accessed on 18 Apr 2024) https://doi.org/10.53347/rID-52652
The cyma line is a radiological sign of the smooth joining of the midtarsal joint lines as a "lazy S-shape" of the talonavicular and calcaneocuboid joints on both AP and lateral views.
Related pathology
Disruption of the cyma line with anterior shift of the talonavicular joint can indicate true shortening of the calcaneus or rotation of the talus relative to the calcaneus as seen in pes planus 3. The cyma line can also be disrupted in a midtarsal (Chopart) injury 4.
History and etymology
A cyma line refers to the union of two curved lines in architecture and comes from the Greek word kyma meaning wave 4.
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1. Zhou Y, Zhou B, Liu J et-al. A prospective study of midfoot osteotomy combined with adjacent joint sparing internal fixation in treatment of rigid pes cavus deformity. Journal of orthopaedic surgery and research. 9: 44. doi:10.1186/1749-799X-9-44 - Pubmed
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2. Miller SJ. End-stage flatfoot. Diagnosis and conservative and surgical management. Journal of the American Podiatric Medical Association. 77 (1): 42-5. doi:10.7547/87507315-77-1-42 - Pubmed
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3. Meyr AJ, Sansosti LE, Ali S. A pictorial review of reconstructive foot and ankle surgery: evaluation and intervention of the flatfoot deformity. (2017) Journal of radiology case reports. 11 (6): 26-36. doi:10.3941/jrcr.v11i6.2757 - Pubmed
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4. Rammelt S & Schepers T. Chopart Injuries. Foot and Ankle Clinics. 2017;22(1):163-80. doi:10.1016/j.fcl.2016.09.011 - Pubmed
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