Coccygectomy for refractory coccydynia, old-fashioned but effective procedure: A retrospective analysis.

PURPOSE: Coccydynia, characterized by persistent pain in the coccygeal region, significantly impacts patients' quality of life. While various treatment modalities exist, including conservative measures and surgical interventions like coccygectomy, optimal management remains unclear. This retrospective cohort study aimed to compare the clinical outcomes, functional improvements, and quality of life in patients with chronic coccydynia undergoing either infiltrative treatment or coccygectomy. METHODS: Data from patients treated at our institution from January 2018 to December 2022 were analyzed. Participants meeting inclusion criteria were divided into two groups: Group A underwent coccygectomy, while Group B received conservative therapy. Clinical assessments, radiographic evaluations, and patient-reported outcomes were collected preoperatively and at follow-up intervals. RESULTS: Of the 223 initially examined patients, 55 met inclusion criteria. Group A (n = 21) underwent coccygectomy, while Group B (n = 34) received conservative therapy. Both groups showed significant pain reduction post-intervention, with sustained improvement in Group A. Functional outcomes favoured Group A, with significant improvements in disability and quality of life measures. Complications were minimal, with only one case of superficial wound infection in Group A. CONCLUSION: Our findings suggest that coccygectomy provides superior and lasting pain relief, functional improvement, and quality of life improvement compared to conservative therapy. While complications were minimal, further research with larger cohorts is warranted to validate these results and explore long-term outcomes. Despite its historical association with complications, advancements in surgical techniques and perioperative care have led to improved outcomes and reduced complication rates. Thus, coccygectomy should be considered in the treatment algorithm for patients with debilitating coccydynia.

Pelvic pain in women after childbirth and physiotherapy.

OBJECTIVE: There are many types of pelvic pain. Pelvic plexus pain, coccyx pain, pain from episiotomy scars, and vulvodynia are frequently seen in postpartum women. The aim of this study was to conduct a systematic review of studies on pelvic pain in postpartum women to assess the effect of physiotherapy interventions on each type of pain. METHODS: A comprehensive literature review was conducted by searching on PubMed, Ovid Embase and Scopus Web of Science using the key words - pelvic pain, women after childbirth, pelvic girdle pain, coccygodynia, episiotomy, vulvodynia, and physiotherapy. The author reviewed all the identified articles and selected articles for inclusion according to relevance to the topic. CONCLUSION: Based on the analysis of the above studies, it can be concluded that a comprehensive physiotherapy designed for postpartum women that includes manual techniques, behavioral techniques, relaxation of hypo-tonic and shortened muscles and strengthening of hypotonic muscles can positively affect a wide range of pain and associated dysfunctions of the pelvic floor and trunk muscles.

Coccygectomy for refractory coccygodynia: a systematic review and meta-analysis.

PURPOSE: We sought to systematically assess and summarize the available literature on outcomes following coccygectomy for refractory coccygodynia. METHODS: PubMed, Scopus, and Cochrane Library databases were systematically searched in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Data concerning patient demographics, validated patient reported outcome measures (PROMs) for pain relief, disability outcomes, complications, and reoperation rates were extracted and analyzed. RESULTS: A total of 21 studies (18 retrospective and 3 prospective) were included in the quantitative analysis. A total of 826 patients (females = 75%) received coccygectomy (720 total and 106 partial) for refractory coccygodynia. Trauma was reported as the most common etiology of coccygodynia (56%; n = 375), followed by idiopathic causes (33%; n = 221). The pooled mean difference (MD) in pain scores from baseline on a 0-10 scale was 5.03 (95% confidence interval [CI]: 4.35 to 6.86) at a 6-12 month follow-up (FU); 5.02 (95% CI: 3.47 to 6.57) at > 12-36 months FU; and 5.41 (95% CI: 4.33 to 6.48) at > 36 months FU. The MCID threshold for pain relief was surpassed at each follow-up. Oswestry Disability Index scores significantly improved postoperatively, with a pooled MD from baseline of - 23.49 (95% CI: - 31.51 to - 15.46), surpassing the MCID threshold. The pooled incidence of complications following coccygectomy was 8% (95% CI: 5% to 12%), the most frequent of which were surgical site infections and wound dehiscence. The pooled incidence of reoperations was 3% (95% CI: 1% to 5%). CONCLUSION: Coccygectomy represents a viable treatment option in patients with refractory coccygodynia.

A novel radiological classification for displaced os coccyx: the Benditz-König classification.

BACKGROUND: Treatment of coccygodynia is still a challenging entity. Clear surgical selection criteria are still lacking. The aim of the investigation was to establish a novel radiological classification for surgical decision-making in coccygodynia cases. MATERIAL AND METHODS: Retrospective analysis of standing and sitting X-rays of coccygodynia patients referred to a single centre from 2018 to 2020. The sacro-coccygeal angle (SCA), the intra-coccygeal angle (ICA) and the difference of the intervertebral disc height (∆IDH) were measured. All coccyges were distributed in subtypes and correlated with the patients' treatment. RESULTS: In total, 138 patients (female/male: 103/35) with a mean age of 45.6 ± 15.4 years were included in the study. In total, 49 patients underwent coccygectomy. Four different subtypes of displaced coccyges were identified: Type I with a non-segmented coccyx, anterior pivot, increased SCA and ICA from standing to sitting, ∆IDH = 1.0 ± 1.5 mm. Type II with a multisegmented coccyx, anterior pivot, increased SCA and ICA standing/sitting, ∆IDH = 1.1 ± 1.6 mm. Type III showed a posterior pivoted coccyx, negative SCA and ICA, ∆IDH = 0.6 ± 1.6 mm. Type IV is characterized by an anterior-posterior dissociation of the tail bone with a positive SCA, and the ICA shifted from a posterior to an anterior orientation. ∆IDH was - 0.6 ± 1.8 mm. CONCLUSION: The presented radiological classification could help to facilitate the surgical decision-making for patients with displaced os coccyx. In addition, lateral and sitting X-rays were easy to perform and did not need unnecessary ionizing radiation like in CT scans and were more cost-effective than MRI investigations. The subtypes III and especially IV were more likely leading to surgery.

Coccygectomy for coccygodynia: a cohort study with a long-term follow-up of up to 29 years.

PURPOSE: We aim to critically review the effectiveness and safety of coccygectomy with special regard to long-term outcomes. METHODS: Coccygectomy was performed in our clinic in 38 patients between 1990 and 2019. All these patients (32 females vs. 6 males) have failed to respond to conservative treatment for at least 6 months prior to surgery. All patients were available for follow-up after mean 12,3 years (2 months to 29 years, 11 patients had a minimum FUP of 24 years). We evaluated all patients clinically and radiologically. RESULTS: Nineteen patients reported traumatic and 17 patients reported idiopathic onset of their symptoms; one patient had clinical symptoms after childbirth and another patient had coccygodynia after extensive low back surgery. 36 of our 38 patients were free of pain at least 6 months after surgery and had good or excellent clinical results according to the VAS which improved from 6.37 (SD 1.08) preoperatively to 0.68 (SD 0.99) at the recent follow-up. Two patients showed an ODI > 22 at the recent follow-up (24 and 28) and 32 had an ODI equal or under 4. There was no statistical significant difference in terms of clinical outcome between the different radiological types of the coccyx. Postoperative complications were rare: 1 superficial infection and one re-operation 6 months after initial surgery due to an pre-existing exostosis which had not been removed at the index surgery; no neurological complications and no major bleeding occurred. No patient had recurrent onset of coccygodynia. 37 out of 38 patients would have coccygectomy again. CONCLUSIONS: Coccygectomy is a safe treatment option in patients with coccygodynia and shows excellent long-term results. We recommend to perform coccygectomy if patients fail to respond to conservative treatment for 6 months. LEVEL OF EVIDENCE: IV.

Retrospective evaluation of pain in patients with coccydynia who underwent impar ganglion block.

BACKGROUND: We aimed to evaluate pain scores one year after impar ganglion block in patients with coccydynia who did not benefit from conservative treatment. METHODS: The medical records of 29 patients with coccydynia were reviewed. Patients who were referred to the algology clinic and underwent impar ganglion blocks were retrospectively evaluated. Demographic data, time to the onset of pain, causes of pain, X-ray findings, administered invasive procedures, and visual analog scale (pain) scores were recorded. RESULTS: A total of 29 patients were included in the study, 10 males (34%) and 19 females (66%). The average age and body mass index were 53.45 ± 9.6 and 29.55 ± 4.21 respectively. In 21 patients, the onset of pain was associated with trauma. Nineteen patients (65.5%) had anterior coccygeal angulation. The average visual analog scale score before undergoing an impar ganglion block was 7.4 ± 1. After the procedure, the scores at < 3 months, 3-6 months and 6 months-1 year follow-up intervals were significantly lower (p < 0.05). Furthermore, visual analog scale scores at the 3-6 months and 6 months-1 year periods were significantly lower in patients who received diagnostic blocks plus pulse radiofrequency thermocoagulation than in patients who underwent a diagnostic block only. CONCLUSIONS: The impar ganglion block provides effective analgesia without complications in patients with coccydynia. Pulse radiofrequency thermocoagulation combined with a diagnostic block prolongs the analgesic effect of the procedure.

Classification of fractures of the coccyx from a series of 104 patients.

PURPOSE: To describe a classification of fractures of the coccyx, according to their mechanism. METHODS: A series of 104 consecutive patients with a fracture of the coccyx was studied. The mechanism, level, characteristics of the fracture line and complications were recorded. RESULTS: Three mechanisms are proposed to describe these fractures: flexion, compression and extension (types 1, 2 and 3, respectively). Flexion fractures (38 cases) involved the upper coccyx in 35 cases, and in 3 cases with a perineal trauma, it was the lower coccyx; compression fractures (24 cases) involved the middle coccyx and occurred only when Co2 was square or cuneiform and Co3 was long and straight, hence a nutcracker mechanism; four patients were adolescents with a compression of the sacrum extremity and were labeled adolescent compression fracture of S5 (type 2b); extension fractures (38 cases) were obstetrical and involved the lower coccyx; their key feature was a progressive separation of the fragments with time. Flexion fractures usually healed spontaneously, but an associated intermittent luxation was possible. Nutcracker and obstetrical fractures were instable in their majority. CONCLUSIONS: For the first time, a classification of fractures of the coccyx is presented. Each type exhibits specific features. This should help the clinician in the management of these patients. These slides can be retrieved under Electronic Supplementary Material.

[Undetected coccyx fracture in a woman with fibromyalgia]. / Unentdeckte Os-coccygis-Fraktur bei Patientin mit Fibromyalgiesyndrom.

This article presents the case of a 46-year-old woman with fibromyalgia with an undetected fracture of the coccyx. The heterogeneity of the symptoms of patients suffering from fibromyalgia including chronic widespread pain, vegetative and functional disorders, mental and physical exhaustion as well as sleep disorders can cause accidentally undetected comorbidities, especially if these are rare and predominantly present with pain as the main symptom. In the present case the reason for symptoms was detected only after 14 months of ineffective therapies and diagnostic procedures. The coccygeal pain was eliminated through a coccygectomy as ultima ratio. It should be nevertheless emphasized that patients with fibromyalgia suffer from a central pain-processing disorder. Indications for operative treatment must be very carefully considered. Surgery should only be considered in consultation with the patient and after failed conservative therapy.

Morphological evaluation of the coccyx with multidetector computed tomography.

PURPOSE: This study aims to evaluate the morphology of the coccyx in adults with multidetector computed tomography and to contribute to the classification of the coccyx using intercoccygeal and sacrococcygeal angle measurements. METHODS: The pelvic computed tomography images of 224 patients were retrospectively evaluated. The multiplanar reconstruction and 3D volume rendering images of the coccyx were obtained from all patients at sagittal and coronal planes. The morphology of the coccyx, number of bone segments, the presence of scoliosis, and presence of sacrococcygeal and intercoccygeal fusion were evaluated. After the measurement of coccygeal length, width, and thickness, intercoccygeal and sacrococcygeal angles were also calculated in all patients. RESULTS: The morphological classification showed that 136 patients (60.7%) had type 1, 65 patients (29%) had type 2, and 17 patients (7.6%) had type 3 coccyx. The intercoccygeal angle was zero degree in five patients (type 0) and one patient had retroverted coccyx (type 5). The coccyx had four segments in 155 patients (69.2%), three segments in 52 patients (23.2%), five segments in 15 patients (6.7%), two segments in one patient (0.4%), and one segment in one patient (0.4%). CONCLUSION: We determined patients with an intercoccygeal angle of zero degree, which is not mentioned in the literature before, and we propose to use the term "type 0" for these patients in the classification of coccyx. The coccygeal measurements and classification will be instructive for the radiologists and have a guiding role for the future studies.

[Therapy-resistant coccygodynia should no longer be considered a myth : The surgical approach]. / Therapieresistente Kokzygodynie sollte nicht länger als Mythos angesehen werden : Der chirurgische Zugang.

BACKGROUND: Coccygodynia is still often considered a mystery, and many patients are not taken seriously with their problems and pain. CASE: A 51-year-old thin lady presented at our clinic with lifelong, persistent low back pain. The clinical examination indicated suspicion of coccygodynia. A functional X­ray revealed a hypermobile os coccygeum with dorsal tilt. After a total coccygectomy via a y-shaped approach, she was completely pain free at the 12 months follow-up examination. No surgical site infection occurred in this period.

Prominent and elongated coccyx, a new manifestation of KBG syndrome associated with novel mutation in ANKRD11.

KBG syndrome is characterized by short stature, distinctive facial features, and developmental/cognitive delay and is caused by mutations in ANKRD11, one of the ankyrin repeat-containing cofactors. After the advent of whole exome sequencing, the number of clinical reports with KBG diagnosis has increased, leading to a revision of the phenotypic spectrum associated with this syndrome. Here, we report a female child showing clinical features of the KBG syndrome in addition to a caudal appendage at the coccyx with prominent skin fold and a peculiar calcaneus malformation. Exons and exon-intron junctions targeted resequencing of SH3PXD2B and MASP1 genes, known to be associated with prominent coccyx, gave negative outcome, whereas sequencing of ANKRD11 whose mutations matched the KBG phenotype of the proband showed a de novo heterozygous frameshift variant c.4528_4529delCC in exon 9 of ANKRD11. This report contributes to expand the knowledge of the clinical features of KBG syndrome and highlights the need to search for vertebral anomalies and suspect this condition in the presence of a prominent, elongated coccyx.

A Review of Current Treatment Options for Coccygodynia.

PURPOSE OF REVIEW: Coccygodynia is pain within the coccyx area. The diagnosis is made clinically with symptoms of pain in the coccyx region and worsening pain in sitting position. The initial treatment is conservative therapy. For patients who do not respond to conservative therapies, there are further interventions available. This includes local injection of local anesthetics and steroids, neurolysis of sacral nerve roots, caudal epidural block, pulse radiofrequency (PRF), intra-rectal massage and manipulation, ganglion impar block, levator ani massage and stretching, coccyx manipulation, and coccygectomy. The purpose of this review is to evaluate the efficacies of these interventions in the treatment of coccygodynia. RECENT FINDINGS: Literature search was performed with the keywords including coccygodynia, treatment, and coccygectomy, on PubMed and Google Scholar between August 2012 and August 2017. Thirteen studies with patients age 18 and over who underwent treatments for coccygodynia were selected for analysis. These treatments include conservative therapies (physical therapy and capsaicin patch), interventional techniques (local injections with steroids and local anesthetic, pulsed radiofrequency ablation of ganglion impar, extracorporeal shock wave therapy), and surgical techniques (complete and partial coccygectomies). The results from these studies demonstrated that most patients had significant pain relief with these techniques. Our literature review demonstrated various interventions including coccygectomy can be effective in the treatment of coccygodynia refractory to conservative therapies. There is a growing body of clinical evidence to support that coccygectomy is an effective treatment for patients with debilitating pain who had failed interventional therapies. Further randomized control studies should be conducted to examine duration of pain relief after coccygectomy and associated surgical complications.

Tailbone Pain from Coccyx Injuries on Water Slides: A Case Series.

BACKGROUND: Water slides and rides are increasingly popular attractions at amusement parks. There has been some documentation of various patterns of injury associated with these rides, most notably vaginal injuries caused by water jets. But we find no previous medical publications reporting the association between water slides/rides with coccydynia (coccyx pain) and tailbone injuries. CASE REPORT: Our purpose in this case report was to assess for an association between water slides/rides with injuries to the coccyx causing coccyx pain. We conducted a retrospective chart review in a coccyx pain clinic on a medical school campus at a level I trauma center. The retrospective chart review took place over a 2-year period and encompassed 217 new patients. Four patients presenting to our coccyx pain clinic had either onset or exacerbation of symptoms with temporal relationship to water slide or ride activities. Three of 4 patients had abnormal dynamic instability on radiologic dynamic imaging, including standing versus seated radiographs and magnetic resonance imaging. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Recreational water slides/rides are a newly reported cause of coccygeal dynamic instability with resultant tailbone pain. Dynamic imaging studies (sitting vs. standing) of the coccyx should be considered in patients with coccyx pain after injuries on a water slide or ride. Many of these patients may initially seek care from emergency physicians.

Concurrent lumbosacral and sacrococcygeal fusion: a rare aetiology of low back pain and coccygodynia?

Sacrum is a triangular bone placed in the base of the spine and formed by the synostosis of five sacral vertebrae (S1-S5). Its upper part is connected with the inferior surface of the body of L5 vertebra forming the lumbosacral joint, while its lower part is connected with the base of the coccyx forming the sacrococcygeal symphysis, an amphiarthrodial joint. The existence of four pairs of sacral fora-mina in both anterior and posterior surface of the sacrum is the most common anatomy. Nevertheless, supernumerary sacral foramina are possible to be created by the synostosis of lumbosacral joint or sacrococcygeal symphysis. We present a case of an osseous cadaveric specimen of the sacrum belonging to a 79-year-old Caucasian woman. A rare variation of the anatomy of the sacrum is reported; in which, the simultaneous fusion of the sacrum with both the L5 vertebra and the coccyx has created six pairs of sacral foramina. This variation should be taken into serious consideration, especially in the domain of radiology, neurosurgery, orthopaedics and spine surgery, because low back pain, coccygodynia and other neurological symptoms may emerge due to mechanical compression. (Folia Morphol 2018; 77, 2: 397-399).

Influence of adequate pelvic floor muscle contraction on the movement of the coccyx during pelvic floor muscle training.

[Purpose] Pelvic floor muscle training is a first-line therapy for female stress urinary incontinence. Previous studies have suggested that the coccyx tip moves ventrally and cranially during pelvic floor muscle contraction. The study aimed to elucidate the influence of adequate pelvic floor muscle contraction on coccyx movement. [Subjects and Methods] Sixty-three females (57 patients with stress urinary incontinence and additional 6 healthy volunteers) were enrolled. Using magnetic resonance imaging, coccyx movement was evaluated during pelvic floor muscle contraction and strain. An adequate contraction was defined as a contraction with good Oxford grading scale [≥3] and without inadequate muscle substitution patterns. [Results] Inadequate muscle substitution patterns were observed in 33 participants (52.4%). No significant difference was observed in the movement of the coccyx tip in the ventrodorsal direction between females with and without inadequate muscle substitution patterns. However, a significant increase in the movement of the coccyx tip in the cranial direction was detected in the group without inadequate muscle substitution patterns. Compared to participants with inadequate pelvic floor muscle contraction, those who had adequate pelvic floor muscle contraction exhibited significantly increased cranial movement of the coccyx. [Conclusion] Adequate pelvic floor muscle contraction can produce cranial movement of the coccyx tip.

Use of intraoperative lateral pelvic X-ray to localize and ensure coccyx removal during sacrococcygeal teratoma resection.

En bloc removal of the coccyx during sacrococcygeal teratoma resection is necessary to decrease the risk of recurrence. However, variable anatomy often makes the border between the coccyx and sacrum difficult to identify. We describe the use of intraoperative lateral pelvic X-ray to localize this border and ensure complete coccygectomy.

[Adult Stature Estimation by Multiple Parameters of Body Torso Segment].

OBJECTIVES: To promote the further research on body stature estimation and the innovative applications based on the distances between the anatomical landmarks on body torso surface. METHODS: A specification for the collection of distances between the anatomical landmarks on body torso surface was established. The data of 933 cases of adult population in Yangtze River Delta region were collected. Multiple linear regression method was used to statistical analyse and establish the regression equation of stature estimation. RESULTS: A regression equation about 5 variables including gender （x1）, cervical vertebrae-coccyx line （x2）, sterna-pubis line （x3）, distance between acromion and iliospinale anterius （x4） and shoulder breadth （x5）, and stature （y） was established, y=105.406+5.414 x1+0.436 x2+0.286 x3+0.225 x4+ 0.193 x5. CONCLUSIONS: The method is suitable for the rapid, simple and accurate estimation of stature for the forensic experts.

Coccygodynia review: coccygectomy case series.

BACKGROUND: Coccygodynia is a pain of the coccyx that is typically exaggerated by pressure. Management includes anti-inflammatory medications, physiotherapy, and coccyx manipulation. Coccygectomy is the surgical approach for treating coccygodynia when the conservative management fails. Generally, coccygectomy yields good results. Its most common complication is wound infection. OBJECTIVE: To determine the effectiveness of coccygectomy in patients with coccygodynia. METHODS: A retrospective review of 70 patients (52 females and 18 males) with coccygodynia at King Khalid University Hospital in Riyadh was carried out, and the outcomes were studied. Twenty patients did not respond to conservative management; therefore, bimanual coccyx manipulation was done. Eleven were identified with instability and did not respond to coccygeal manipulation. Coccygectomy was performed on 8 patients while 3 declined. RESULTS: All patients who underwent coccygectomy showed improvement of their symptoms. One case of superficial wound infection and delayed wound healing was encountered. CONCLUSION: Coccygectomy provides effective pain relief to patients not responding to conservative therapies.

Extracorporeal shock wave therapy for the treatment of coccydynia: a series of 23 cases.

BACKGROUND: Coccydynia can lead to significant functional disability and worsening of quality of life if not properly managed. In this study, we aim to assess the outcomes of extracorporeal shock wave therapy in patients with coccydynia. METHODS: A prospective case series study was carried out from January to December 2015. Twenty-three patients, mean age of 38.3 ± 12.1 (range 18-64), were included. The majority were females (13; 56.5%), had pain for at least 6 weeks (17; 73.9%) and had trauma to the sacrococcygeal region (17; 73.9%). They had three sessions (one session per week for three consecutive weeks) of focused shock wave therapy directed to the maximal point of coccygeal tenderness. Numerical pain scale and Oswestry disability index were used to assess outcome. RESULTS: Six (26.1%) patients did not complete the follow-up because of no, or minimal, improvement of their pain. After 6 months of follow-up, the median numerical pain scale significantly decreased from 7.0 ± 4.0 to 2.0 ± 2.0 among the 17 patients with coccydynia (p < 0.001). The median Oswestry disability index improved from 24.0 ± 9.0 before therapy to 8.0 ± 9.0 at final follow-up (p < 0.001). Before treatment, 12 (70.6%) patients had moderate-to-severe disability. In contrast, no patients had severe disability and only one (5.9%) patient had moderate disability at final follow-up (p < 0.001). CONCLUSION: Extracorporeal shock wave therapy had favorable outcomes in treating coccydynia. The majority of patients had partial relief of their pain and disability following this therapy.

Sacrum and Coccyx Radiographs Have Limited Clinical Impact in the Emergency Department.

OBJECTIVE: The purpose of this study was to determine the yield and clinical impact of sacrum and coccyx radiographs in the emergency department (ED). MATERIALS AND METHODS: Consecutive sacrum and coccyx radiographs obtained in the EDs of four hospitals over a 6-year period were categorized as positive for acute fracture or dislocation, negative, or other. Five follow-up metrics were analyzed: follow-up advanced imaging in the same ED visit, follow-up advanced imaging within 30 days, new analgesic prescriptions, clinic follow-up, and surgical intervention within 60 days. RESULTS: Sacrum and coccyx radiographs from 687 patients (mean age, 48.1 years; 61.6% women and 38.4% men) obtained at level-1 (n = 335) and level-2 (n = 352) trauma centers showed a positivity rate of 8.4% ± 2.1% (n = 58/687). None of the 58 positive cases had surgical intervention. At the level-1 trauma centers, there was no significant association between sacrum and coccyx radiograph positivity and analgesic prescription or clinical follow-up (p = 0.12; odds ratio [OR], 2.3; 95% CI, 0.81-6.20). At the level-2 trauma centers, 97.1% (n = 34/35) of patients with positive sacrum and coccyx radiographs received analgesic prescriptions or clinical referrals, whereas negative cases were at 82.9% (OR, 7.0; 95% CI, 0.94-52.50). Of all cases, 5.7% (n = 39) and 4.3% (n = 29) had advanced imaging in the same ED visit and within 30 days, respectively. Sacrum and coccyx radiography results had no significant correlation with advanced imaging in the same ED visit (level-1, p = 0.351; level-2, p = 0.179). There was no significant difference in 30-day advanced imaging at the level-1 trauma centers (p = 0.8), but there was at the level-2 trauma centers (p = 0.0493). CONCLUSION: ED sacrum and coccyx radiographs showed a low positivity rate and had no quantifiable clinical impact. We recommend that sacrum and coccyx radiographs be eliminated from ED practice and patients treated conservatively on the basis of clinical parameters.