Traumatic posterior dislocation of sacrococcygeal joint: A case report and review of the literature

BACKGROUND: Sacrococcygeal joint dislocation is very rare. There are seven cases of sacrococcygeal joint dislocation found in the literature; most are anterior, and only one prior case of posterior dislocation was reported involving the mid-coccygeal joint. Here, we report another case of posterior dislocation of the sacrococcygeal joint. CASE DESCRIPTION: A 19 year-old female developed acute low-back and groin pain following a fall from the first floor. She was diagnosed with an unstable pelvic fracture along with posterior dislocation of the sacrococcygeal joint. The next day, after being hemodynamically stabilized, she underwent percutaneous fixation of the sacral fracture, while the sacrococcygeal joint dislocation was managed conservatively. Her pain decreased, and she was discharged on the third postoperative day and followed up to 6 weeks. CONCLUSION: Most sacrococcygeal joint dislocations can be managed conservatively.