Imaging approach to ingested foreign bodies in the neck.

Foreign body ingestion is a common clinical occurrence worldwide, with high morbidity in the pediatric population and in adult patients with intentional attempts. Coins and button battery ingestions are more common among children. Bone impaction and swallowed dentures are usually seen in older adults. While most ingested foreign bodies pass through the gastrointestinal tract spontaneously with no complications, some require endoscopic and/or surgical intervention. Complications such as pharyngoesophageal ulceration, perforation, stricture, and deep neck infection can develop without timely diagnosis and management. The purpose of this article is to familiarize radiologists with the imaging approach to assess for characteristics and impacted locations of ingested foreign bodies in the neck.

Complicated penetrating foreign body neck injury.

Penetrating neck injury is associated with significant morbidity due to the several structures (neurological, vascular and aerodigestive) within close proximity to one another. This case highlights an uncommon presentation of an embedded foreign body following penetrating neck trauma and the decision-making required during management.

'No zone' approach in the management of penetrating neck injuries - an Australian Tertiary Trauma Centre experience.

PURPOSE: Penetrating neck injuries (PNIs), defined as deep to the platysma, can result in significant morbidity and mortality. Management has evolved from a zone-based approach to a 'no zone' algorithm, resulting in reduced non-therapeutic neck exploration rates. The aim of this study was to examine PNIs and its management trends in an Australian tertiary trauma centre, to determine if a 'no zone' approach could be safely implemented in this population, as has been demonstrated internationally. METHODOLOGY: This was a retrospective observational study at a level 1 adult Australian tertiary trauma centre using prospectively collated data from January 2008 to December 2018. Observed data included age, gender, mechanism of injury, computed tomography angiography (CT-A) use and operative intervention. Patients were examined based on zone of injury and presenting signs - 'hard', 'soft' or 'asymptomatic'. Major outcomes were CT-A usage, positive CT-A correlation with therapeutic neck explorations and negative neck exploration rates. RESULTS: This study identified 238 PNI patients, with 204 selected for review. Most injuries occurred in zone 2 (71.6%), with soft signs accounting for 53.4% of cases. Over 10 years, CT-A utilization increased from 55% to 94.1%, with positive CT-As being more likely to yield therapeutic neck explorations. There was a general decreased trend in operative intervention but without a clear reduction in non-therapeutic neck explorations. CONCLUSION: Our data suggests similarities with results from around the world, demonstrating that the 'no zone' approach should be considered when managing PNIs, but with clinician discretion in individual cases.

Clinical Reasoning: A 24-Year-Old Woman With Penetrating Neck Injury From a Needlefish.

Evaluating patients with a traumatic spinal cord injury can be complicated by other injuries. In this case, a 24-year-old woman injured by a needlefish presented with combined motor and sensory defects, cranial nerve deficits, and a blunt vascular injury. This case highlights the importance of neurologic and vascular localizations and an understanding of spinal cord injuries involving various ascending and descending tracts. Appreciation of these anatomical considerations through this case illustrates the diagnostic approach to neurologic evaluation. While we present a traumatic etiology for multiple neurologic syndromes, this case gives readers an opportunity to develop a comprehensive differential diagnosis and tailor investigations for other relevant etiologies. Readers walking through this stepwise process will ultimately arrive at several distinct but related diagnoses.

Surgical exploration for penetrating neck trauma - an audit of results in 145 patients.

BACKGROUND: Selective non-operative management (SNOM) is the current gold standard for the treatment of patients with penetrating neck trauma. The policy revolves around the liberal use of computed tomography angiography (CTA) in those patients who are haemodynamically stable, irrespective of the anatomical zone of injury, aiming at reducing the incidence of negative and non-therapeutic interventions and their potential complications. METHODS: A retrospective audit of results of patients who underwent immediate surgical exploration at the Chris Hani Baragwanath Academic Hospital in Soweto between January 2010 and December 2015 was performed. RESULTS: One-hundred and forty-five (145) patients, with a median age of 28 years (range 18-67 years), predominantly males (93.8%), underwent immediate exploration. Most injuries were caused by stab wounds (92.4%) and affected zone 2 (54.1%) on the left side of the neck (69.6%). The most common presentations were active haemorrhage (29.4%), shock (24.1%) and expanding haematoma (15.1%). A major vascular injury was found in 40%, and aero-digestive organ injury in 19.3%. The rate of negative-non-therapeutic exploration in this cohort was 4.1%. Complications were recorded in 7.6%, and the overall mortality was 9.6% secondary to early uncontrolled haemorrhage, sepsis and occlusive strokes. CONCLUSIONS: The utilisation of SNOM with strict criteria for selection of patients who require immediate surgical exploration versus investigations with CTA results in a low rate of non-therapeutic interventions.

Thyroid gland injury after blunt neck trauma: a case report.

Soft-tissue injuries are relatively common after blunt neck trauma. Due to neck content, several vital structures can be compromised. Isolated trauma to the thyroid is highly uncommon, and few cases are reported in the literature. A 61-year-old otherwise healthy woman sustained blunt trauma to the left frontal half of the neck caused by seatbelt injury in a motor vehicle accident. She presented with a painful anterior neck swelling associated with dyspnea. Computed tomography showed the left thyroid lobe lacerations with features suggestive of thyroid gland active bleeding. She underwent surgical exploration with left thyroidectomy and recovered un-eventfully. Isolated thyroid gland injury is infrequent and is present in about 1-2% of the cases, and in most reported cases, there is an underlining pathology within the gland. Patients can be present with neck swelling, pain, respiratory distress, and dysphagia. Patients who sustained blunt neck trauma should be assessed and stabilized according to the ATLS® principles. Injury to vital structures should be ruled out first. Although these cases are rare, physicians should consider the possibility of thyroid injury after blunt neck trauma or neck swelling is noted.

Cervical spine trauma - Evaluating the diagnostic power of CT, MRI, X-Ray and LODOX.

BACKGROUND: Traumatic cervical spine (c-spine) injuries account for 10% of all spinal injuries. The c-spine is prone to injury by blunt acceleration/deceleration traumas. The Canadian C-Spine rule and NEXUS criteria guide clinical decision-making but lack consensus on imaging modality when necessary. This study aims to evaluate the sensitivity and specificity of CT, MRI, X-Ray, and, for the first time, LODOX-Statscan in identifying c-spine injuries in patients with blunt trauma and neck pain. METHODS: We conducted a retrospective monocenter cohort study using patient data from the emergency department at Inselspital, Bern, Switzerland's largest level one trauma center. We identified patients presenting with trauma and neck pain during the recruitment period from 01.01.2012 to 31.12.2017. We included all patients that required a radiographic c-spine evaluation according to the NEXUS criteria. Certified spine surgeons reviewed each case, analyzed patient demographics, injury classification, trauma mechanism, and emergency management. The retrospective full case review was established as gold standard to decide whether the c-spine was injured. Sensitivity and specificity were calculated for CT, MRI, LODOX, and X-Ray imaging methods. RESULTS: We identified 4996 patients, of which 2321 met the inclusion criteria. 91.3% (n = 2120) patients received a CT scan, 8.9% (n = 206) a MRI, 9.3% (n = 215) an X-ray, and 21.5% (n = 498) a LODOX scan. By retrospective case review, 186 participants were classified as injured. The sensitivity of CT was 88.6% (specificity 99%), and 89.8% (specificity 99.2%) with orthopedic surgeon consultation. MRI had a sensitivity of 88.5% (specificity of 96.9%); highlighting 14 cases correctly diagnosed as injured by MRI and misdiagnosed by CT. Projection radiography (36.4% sensitivity, 95.1% specificity) and LODOX (5.3% sensitivity, 100% specificity) were unsuitable for ruling out spinal injury. CONCLUSION: While CT offers high sensitivity for detecting traumatic c-spine injury, MRI holds clinical significance in revealing injuries not recognized by CT in symptomatic patients. LODOX and projection radiography are insufficient for accurately ruling out c-spine injury. For patients with neurological symptoms, we recommend extended MRI use when CT scans are negative.

An Evaluation of Diagnostic Tests for Aerodigestive Injuries in Penetrating Neck Trauma.

Assessment of aerodigestive injuries in penetrating neck trauma (PNT) is currently left up to the discretion of physicians which can result in a lot of confusion and unnecessary testing. This study was performed at a level 1 trauma center to assess the role of computed tomography arteriogram (CTA) in evaluating for aerodigestive injury in PNT. A total of 242 patients met criteria, with ages ranging from 7 to 86 years. Computed tomography arteriogram, EGD, esophagography, and bronchoscopy were classified into positive, negative, and indeterminate results. Computed tomography arteriogram was then further analyzed for violation of the carotid sheath, investing, pretracheal, and deep cervical fascias. Results showed a high sensitivity and NPV (100%) of CTA in assessing aerodigestive injury. Computed tomography arteriogram is a reliable first-line screening tool for aerodigestive injury. EGD appears more useful than esophagography at identifying esophageal injuries. Esophagography and bronchoscopy should be reserved to aid in injury management decision-making rather than as screening studies.

A pictorial review of imaging findings associated with upper cervical trauma.

The diagnosis of cervical spine injury in the emergency department remains a critical skill of emergency room physicians as well as radiologists. Such diagnoses are often associated with high morbidity and mortality unless readily identified and treated appropriately. Both computed tomography (CT) and magnetic resonance imaging (MRI) often are crucial in the workup of spinal injury and play a key role in arriving at a diagnosis. Unfortunately, missed cervical spine injuries are not necessarily uncommon and often precede detrimental neurologic sequalae. With the increase in whole-body imaging ordered from the emergency department, it is critical for radiologists to be acutely aware of key imaging features associated with upper cervical trauma, possible mimics, and radiographic clues suggesting potential high-risk patient populations. This pictorial review will cover key imaging features from several different imaging modalities associated with upper cervical spine trauma, explore patient epidemiology, mechanism, and presentation, as well as identify confounding radiographic signs to aid in confident and accurate diagnoses.

Cervical Collar Clearance in Obtunded Children Presenting Without a Known Traumatic Mechanism: Is Imaging Necessary?

BACKGROUND: Obtunded pediatric patients are often placed in cervical collars (c-collars) to protect their cervical spine (c-spine) while injury is being ruled out, even without a known traumatic injury. The goal of this study was to determine the necessity of c-collars in this population by determining the rate of c-spine injury among patients with suspected non-traumatic mechanisms of loss of consciousness. METHODS: A single institution, ten-year retrospective chart review was conducted including all obtunded patients admitted to the Pediatric Intensive Care Unit without a known traumatic event. Patients were categorized into five groups based on etiology of obtundation: respiratory, cardiac, medical/metabolic, neurologic, and other. Comparisons were made between those placed in a c-collar and a control group who were not, using Wilcoxon rank sum test for continuous measures, and Chi-square or Fisher's exact test for categorical measures. RESULTS: 464 patients were included, of which 39 (8.41%) were placed in a c-collar. There was a significant difference in whether a patient was placed in a c-collar based on diagnosis category (p < 0.001). Those placed in a-c-collar were more likely to undergo imaging studies than the control group (p < 0.001). The overall incidence of c-spine injury in this patient population in our study was zero. CONCLUSION: Cervical collar placement and radiographic evaluation is not necessary in obtunded pediatric patients who present without a known traumatic mechanism as the overall risk of injury is low. Consideration for collar placement should be given in cases when trauma cannot be definitively ruled out at initial evaluation. LEVELS OF EVIDENCE: III.

Hanging and Strangulation Injuries: An Institutional Review From a Level 1 Pediatric Trauma Center.

BACKGROUND: We sought to define the incidence and outcomes of pediatric hanging and strangulation injuries to inform best practices for trauma triage and management. METHODS: A retrospective review was conducted that included all patients who presented after hanging or strangulation to a Level I Pediatric Trauma Center from 2011 through 2021. Patient demographics, injury characteristics, and clinical outcomes were collected. All imaging modalities of the head and neck were reviewed to determine if a bony fracture or vascular injury was present. RESULTS: Over the 11-year study period, 128 patients met inclusion criteria. The median age of the cohort was 13 years [IQR: 8.5-15], most patients were male (60.9%), and the median GCS was 11 [3, 15]. There were 96 cases (75%) that were intentional injuries. 76 patients (59.4%) received imaging in the form of plain radiographs, CT, or MRI of the neck and cervical spine. No fractures were identified and there were 0 clinically significant cervical spine injuries. CT angiograms of the neck identified no cerebral vascular injuries. Mortality was high (32%), and 25% of patients with nonaccidental injuries had a documented prior suicide attempt. CONCLUSION: We identified no cervical spine fractures and no blunt cerebral vascular injuries after a hanging or strangulation in over 10 years at a Level 1 Pediatric Trauma Center. Use of CT and CT angiography of the neck and cervical spine should be minimized in this patient population without high clinical index of suspicion and/or significant mechanism. LEVEL OF EVIDENCE: IV.

Vascular Injuries in Head and Neck Trauma.

Blunt and penetrating vascular injuries of the head and neck can represent life-threatening emergencies that require accurate detection to prevent devastating and long-lasting consequences. Implementing appropriate screening criteria to indicate imaging studies is crucial as there is a variable latent time before the onset of clinical manifestations. Computed tomography angiography, MR imaging, and digital subtraction angiography represent the imaging modalities of choice to evaluate vascular injuries. The aim of this review is to provide a description of the different types of vascular injuries, describe the importance of each imaging modality, and recognize the imaging appearance of traumatic vessel injury.

Management and outcomes of military penetrating neck injuries: An eleven-year retrospective case note review.

INTRODUCTION: Penetrating Neck Injuries (PNIs) affected 3.2% of trauma patients attending US and UK deployed medical treatment facilities (MTFs) during the Iraq and Afghanistan conflicts. Injured military personnel requiring aeromedical evacuation for such injuries were managed at the Royal Centre for Defence Medicine (RCDM), Birmingham, UK. The aim of this paper was to review the management of PNI in both deployed MTFs and when evacuated back to the UK. PATIENTS AND METHODS: A retrospective case note review was performed of all military patients who sustained PNI whilst on deployment overseas, and who were subsequently evacuated to RCDM between March 2003 and December 2014. RESULTS: Forty casualties who sustained PNI were identified, of which 28/40 (70%) sustained injury from explosive fragmentation, and 11/40 (28%) from gunshot wounds. Hard signs of PNI were present in 3/40 (7.5%) patients, soft signs in 14/40 (35%), no signs in 12/40 (30%), and unknown signs in 11/40 (28%) patients. Computed tomography angiography (CTA) was used in 39/40 (98%) patients, and was effective at ruling out significant injury, with 100% (29/29) of casualties with a negative CTA not developing vascular or aerodigestive injury. There were 9/29 (31%) patients who had surgical neck exploration despite both a negative CTA and absence of hard signs of PNI. There were 12/40 (30%) patients who required operative intervention at RCDM. CONCLUSION: UK military surgeons in Role 3 MTFs had a low threshold for surgical exploration, even in the absence of CT findings or hard signs. This was likely due to the high-energy mechanisms responsible for military PNI, in addition to the limited availability of equipment and clinical expertise in visualising the larynx.

Cervical Spine Fracture with Extreme Dislocation in a Patient with Ankylosing Spondylitis: A Case Report and Systematic Review of the Literature.

Background: Ankylosing spondylitis (AS) is a seronegative arthropathy which results in pathological ossification of the ligaments, disc, endplates and apophyseal structures. Cervical spinal fractures are more common in patients with ankylosing spondylitis than in patients without ankylosing spondylitis due to coexistent osteoporosis and kyphotic alignment of the spine. The risk of fracture-dislocation and associated spinal cord injury is also more in these patients. Management of cervical spine fractures in patients with ankylosing spondylitis is more challenging. Case Description: We report a 56-year-old male patient who presented to our emergency department following a road traffic accident. He had ASIA B spinal cord injury at C7 level. CT scan revealed a C6-7 fracture-dislocation with features suggestive of AS. The fracture involved all the three columns and extended through C7 body anteriorly and through the C6-7 disc posteriorly. The treating team was not aware that he had AS, and thus, precautions related to his head position were not taken. He underwent reduction of the fracture-dislocation and 360° fixation. Conclusions: The management of cervical spine fractures in patients with ankylosing spondylitis is challenging. They need long segment fixation in their preoperative spinal alignment. Proper preoperative planning can result in good outcome.

Feasibility analysis of high pitch cervical spine CT in uncooperative patients with acute cervical spine trauma: An initial experience.

Cervical computed tomography (CT) often suffers from examination failure in uncooperative patients with acute cervical spinal trauma. Therefore, this study aimed to evaluate the feasibility of using high-pitch cervical CT (HP-CT) in such populations. A total of 95 patients with acute neck/head-neck trauma who underwent HP-CT (n = 29) or standard cervical CT (SD-CT, n = 66) from October 2020 to June 2021 were included in this study. Differences in patient characteristics between the HP-CT group and the SD-CT group were firstly compared. Then, the objective image quality based on the mean score of the signal-to-noise ratio (SNR)/contrast noise ratio (CNR) was evaluated, while double-blind five-point scoring was adopted for the subjective evaluation. Finally, radiation doses in HP-CT and SD-CT were compared. Furthermore, the Student t test and/or Mann-Whitney U test were performed to analyze differences in patient characteristics, image quality, and radiation dose between the two regimes. A total of 17 cases of cervical spine fractures were found in 95 patients, including 6 cases in the HP-CT group and 11 cases in the SD-CT group. The average age of patients who received HP-CT was higher than that of those who received SD-CT, and the scan time using HP-CT was shorter than that SD-CT. The differences were statistically significant (both, P < .05). In addition, there was no significant difference between HP-CT and SD-CT in terms of sex, body mass index, field of view (FOV), and scan length (all P > .05). The SNR/CNR at the middle and upper neck was not significantly different between HP-CT and SD-CT (all P > .05). However, the SNR/CNR at the lower neck in HP-CT was lower than that in SD-CT (all P < .05). There was no significant difference in the subjective scores between HP-CT and SD-CT images in both the soft tissue and bone window (P = .129 and 0.649, respectively). The radiation dose in HP-CT was lower than that in SD-CT (all P < .05). With a scan time reduction of 73%, radiation dose reduction of 10%, and similar image quality, high-pitch cervical CT was of feasibility to evaluate cervical spine injury in uncooperative patients with acute cervical spine trauma.

Comparison of findings identified at traditional invasive autopsy and postmortem computed tomography in suicidal hangings.

Cases of suicidal hanging are a common death referred for medico-legal autopsy throughout the world. Although some advocate using postmortem computed tomography (PMCT) without traditional invasive autopsy (TIA) to investigate such deaths, others reject this approach. There is currently limited evidence to guide practice. In this context, the TIA reports and PMCT images of 50 cases of suspected suicidal hanging during an 11-month period were reviewed. The reviewers were blinded to the findings of the other modality. A Cohen's Kappa coefficient (K) was calculated to assess agreement between TIA and PMCT across a range of pertinent findings. This analysis demonstrated perfect agreement for identification of a ligature (K = 1.00) and a strong level of agreement for identification of a ligature suspension point (K = 0.832) but only a minimal level of agreement for overall ligature mark (K = 0.223). PMCT demonstrated a weak level of agreement for fractures of hyoid bone (K = 0.555) and thyroid cartilage (K = 0.538). Three probable fractures not identified at TIA were identified on PMCT. TIA was shown to be superior in the identification of intramuscular and laryngeal fracture-related haemorrhage/bruising whereas PMCT was superior to TIA in identifying body gas deposition. There was overall good correlation between the natural disease and trauma identified elsewhere in the body during the TIA and PMCT. The study demonstrates that PMCT can assist the investigation of suspected suicidal hangings. However, the accuracy of many findings is limited, and if it is used as an alternative to the TIA, potentially pertinent findings, such as fractures of the laryngeal cartilages, could be missed.

Variability of Pediatric Cervical Spine Clearance Protocols: A Systematic Review.

OBJECTIVE: The objective of this study was to better understand the variability that exists in the contemporary pediatric cervical spine (c-spine) clearance protocols and how this variability affects clinical practice and outcomes. BACKGROUND DATA: Pediatric c-spine injury is a rare but potentially devastating event. In the adult population, validated tools, such as the National Emergency X-Radiography Utilization Study (NEXUS) criteria and the Canadian C-spine Rule, are available to aid in safely clearing the c-spine clinically while reducing the utilization of radiography. In the pediatric population, no standardized, validated tool exists, leading to variability in protocols that are put to use. METHODS: A systematic literature search was conducted in Cochrane, Embase, PubMed/MEDLINE, and Web of Science electronic databases from January 1, 2009 until April 30, 2021. Data were extracted from studies that met inclusion criteria. Quality of the included studies was assessed using the Methodological Index for Non-Randomized Studies (MINORS) criteria. RESULTS: There were 19 studies included in this systematic review. From these 19 studies, there were 16 unique protocols, 12 of which (75%) utilized some or all NEXUS criteria. Of the protocols that provided a detailed imaging algorithm (N=14), 12 (85.7%) utilized x-rays as the initial imaging modality. Indications for computed tomography and magnetic resonance imaging varied widely across the protocols. The rate of x-rays, computed tomography, and magnetic resonance imaging utilization ranged from 16.7% to 97.8%, 5.4% to 100%, and 0% to 100%, respectively. Ten studies evaluated the efficacy of protocol implementation, with 9 (90%) of these studies showing an overall reduction of imaging rates in the postprotocol period. No clinically significant missed injuries were reported in the included studies. CONCLUSIONS: Details of c-spine clearance protocols differed significantly across the included studies, but many applied some or all NEXUS criteria. Overall, while variable, protocols served to safely treat pediatric patients without missing any clinically significant c-spine injuries, while reducing radiation exposure.

Vertebral arteriovenous fistula due to blunt neck trauma: A case report.

The arteriovenous fistulas (AVFs) of the vertebral artery are usually caused by iatrogenic and penetrating traumas. Vertebral AVF is rarely seen after blunt cervical trauma. A 65-year-old male patient applied to the emergency clinic due to falling from a height of about 3 m. In his neurological examination, he had weakness in the left upper limb and tinnitus in the left ear. The cervical computed tomog-raphy examination showed a Hangman's fracture, a C3 vertebra corpus compression fracture, and a C1 anterior arch fracture. There was a separation on the C1-2 transverse foramen due to the fracture, and there was a fracture in the left C3-4 transverse foramen. In cervical magnetic resonance imaging (MRI), the presence of a contusion in the spinal cord at the C2 corpus level was observed. Through an MRI angiography examination of the vertebral artery, it was determined that the left vertebral artery had developed an AVF at the V2-3 segment level. Stabilization surgery was performed with a posterior approach for unstable vertebrae. Then, vertebral AVF was then closed endovascularly using a stent coil. Improvement in neurological deficit was seen after surgery and endovascular treatment. There were no complications related to the procedure. Transverse foramen should be carefully evaluated, especially in the upper cervical trauma. Vertebral artery imaging should be performed before instability surgery in the presence of a separation in the fracture line to determine whether the damage to the vertebral artery is iatrogenic.