Indiran Venkatraman, Sivakumar Vadivalagianambi, Maduraimuthu Prabakaran
Department of Radiodiagnosis, Sree Balaji Medical College and Hospital, Chennai, India.
Department of Radiodiagnosis, Meenakshi Medical College Hospital & Research Institute, Kanchipuram, India.
Asian Spine J. 2017 Oct;11(5):694-699. doi: 10.4184/asj.2017.11.5.694. Epub 2017 Oct 11.
A retrospective, cross-sectional study of 213 patients who presented for abdominal computed tomography (CT) scans to assess coccygeal morphology in the Indian population.
There have been relatively few studies of coccygeal morphology in the normal population and none in the Indian population. We aimed to estimate coccygeal morphometric parameters in the Indian population.
Coccygeal morphology has been studied in European, American, Korean, and Egyptian populations, with few differences in morphology among populations.
A retrospective analysis of 213 abdominal CT scans (114 males and 99 females; age, 7-88 years; mean age, 47.3 years) was performed to evaluate the number of coccygeal segments, coccyx type, sacrococcygeal and intercoccygeal fusion and subluxation, coccygeal spicules, sacrococcygeal straight length, and sacrococcygeal and intercoccygeal curvature angles. Results were analyzed for differences in morphology with respect to sex and coccyx type.
Types I and II coccyx were the most common. Most subjects had four coccygeal vertebrae; 93 subjects (43.66%) had partial or complete sacrococcygeal fusion. Intercoccygeal fusion was common, occurring in 193 subjects. Eighteen subjects had coccygeal spicules. The mean coccygeal straight length was 33.8 mm in males and 31.5 mm in females; the mean sacrococcygeal curvature angle was 116.6° in males and 111.6° in females; the mean intercoccygeal curvature angle was 140.94° in males and 145.10° in females.
Type I was the most common coccyx type in our study, as in Egyptian and Western populations. The number of coccygeal vertebrae and prevalence of sacrococcygeal and intercoccygeal fusion in the Indian population were similar to those in the Western population. The mean coccygeal straight length and mean sacrococcygeal curvature angle were higher in males, whereas the intercoccygeal curvature angle was higher in females. Information on similarities and differences in coccygeal morphology between different ethnic populations could be useful in imaging and treating patients presenting with coccydynia.
一项对213例因腹部计算机断层扫描（CT）来评估印度人群尾骨形态的患者进行的回顾性横断面研究。
正常人群中关于尾骨形态的研究相对较少，印度人群中尚无此类研究。我们旨在评估印度人群的尾骨形态学参数。
已对欧洲、美国、韩国和埃及人群的尾骨形态进行了研究，不同人群之间在形态上差异不大。
对213例腹部CT扫描（114例男性和99例女性；年龄7 - 88岁；平均年龄47.3岁）进行回顾性分析，以评估尾骨节段数量、尾骨类型、骶尾和尾骨间融合与半脱位、尾骨棘、骶尾直线长度以及骶尾和尾骨间弯曲角度。分析结果以探讨性别和尾骨类型在形态上的差异。
I型和II型尾骨最为常见。大多数受试者有四块尾椎；93名受试者（43.66%）存在部分或完全骶尾融合。尾骨间融合很常见，193名受试者出现这种情况。18名受试者有尾骨棘。男性尾骨平均直线长度为33.8毫米，女性为31.5毫米；男性骶尾弯曲平均角度为116.6°，女性为111.6°；男性尾骨间弯曲平均角度为140.
