Abstract
Purpose
To assess the intercoccygeal angle of asymptomatic patients (without coccydynia), to study if there is a difference of angle between types of coccyx and between genders with the same type of coccyx.
Materials and methods
Ninety-two patients (42 females, 50 males, range of ages 8–86, mean 50) who underwent computed tomography (CT) angiography and colonoscopy were included in the study. CT images with slice thickness of 1 or 1.5 mm were evaluated with 3D sagittal reformats and intercoccygeal angle, type of coccyx were examined.
Results
Twenty-one females and 18 males had type 1 coccyx with mean intercoccygeal angle 36.4° ± 10.56 (33.29° for females and 40.05° for males) and the difference of the angles between genders is statistically significant (P = 0.044). Among 36 patients (14 were females and 22 were males) with type 2 coccyx demonstrated mean intercoccygeal angle of 56.36° ± 10.8. 15 patients were shown to have type 3 coccyx and the mean intercoccygeal angle was 72.1° ± 31.86. No significant difference of angles was seen between genders. Type 4 coccyx was not seen and two coccyx could not be classified. There was a significant difference of intercoccygeal angle between the groups overall.
Conclusion
Type 1 is the most common coccyx type in asymptomatic patients. Significant difference of intercoccygeal angle was defined between the types of coccyx. These values may be reference for the patients underwent surgery for the coccydynia and a new classification may be needed since exceptional shape of coccyx exists that could not be defined according to the known classification.
Similar content being viewed by others
References
Balain B, Eisenstein SM, Alo GO, Darby AJ, Cassar-Pullicino VN, Roberts Se, Jaffray DC (2006) Coccygectomy for coccydynia: case series and review of literature. Spine 31:414–420
Borgia C (1964) Coccygodynia: its diagnosis and treatment. Mil Med 129:335–338
Dennell LV, Nathan S (2004) Coccygeal retroversion. Spine 29:256–257
Duncan G (1937) Painful coccyx. Arch Surg 37:1088–1104
Fogel GR, Cunningham PY 3rd, Esses SI (2004) Coccygodynia: evaluation and management. J Am Acad Orthop Surg 12:49–54
Grassi R, Lombardi G, Reginelli A, Capasso F, Romano F, Floriani I, Colacurci N (2007) Coccygeal movement: assessment with dynamic MRI. Eur J Radiol 61:473–479
Gross NP, Van Dain BE (1995) Total coccygectomy for relief of coccygectomy: A retrospective review. J Spinal Disord 8:328–330
Hamsa W (1937) Coccygodynia: a study of end result of treatment. J Iowa State Med Soc 27:154–156
Hellberg S, Strange-Vognsen H (1990) Coccygodynia treated by resection of the coccyx. Acta Orthop Scand 61:463–465
Kersey PJ (1980) Non-operative management of coccygodynia. Lancet 1:318
Key JA (1937) Operative treatment of coccydynia. J Bone Joint Surg Br 19:759–764
Kim NH, Kyunk SS (1999) Clinical and radiological differences between traumatic and idiopathic coccygodynia. Yonsei Med J 40:215–220
Maigne JY, Doursounian L, Chatellier G (2000) Causes and mechanisms of common coccydynia: Role of body mass index and coccygeal trauma. Spine 25:3072–3079
Maigne JY, Guedj S, Straus C (1994) Idiopathic coccygodynia. Lateral roentgenograms in the sitting position and coccygeal discography. Spine 19:930–934
Maigne JY, Lagauche D, Doursounian L (2000) Instability of the coccyx in coccydynia. J Bone Joint Surg Br 82:1038–1041
Maigne JY, Tamalet B (1996) Standardized radiologic protocol for the study of common coccygodynia and characteristics of the lesions observed in the sitting position. Clinical elements differentiating luxation, hypermobility, and normal mobility. Spine 21:2588–2593
Postacchini F, Massobrio M (1983) Idiopathic coccygodynia. Analysis of fifty-one operative cases and a radiographic study of the normal coccyx. J Bone Joint Surg Am 65:1116–1124
Pyper JB (1957) Excision of the coccyx for coccydynia: a study of results in twenty-eight cases. J Bone Joint Surg Br 39:733–737
Simpson J (1859) Clinical lectures on the diseases of women. Lecture XVII Cocygodynia and dseases and deformities of the coccyx. Medial Times Gazette 40:1–7
Yamashita K (1988) Radiological study of 1500 coccyces. Nippon Seikeigeka Gakkai Zasshi 62:23–36
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kerimoglu, U., Dagoglu, M.G. & Ergen, F.B. Intercoccygeal angle and type of coccyx in asymptomatic patients. Surg Radiol Anat 29, 683–687 (2007). https://doi.org/10.1007/s00276-007-0262-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00276-007-0262-9