Machine Learning for Automatic Detection of Velopharyngeal Dysfunction: A Preliminary Report

BACKGROUND

Even after palatoplasty, the incidence of velopharyngeal dysfunction (VPD) can reach 30%; however, these estimates arise from high-income countries (HICs) where speech-language pathologists (SLP) are part of standardized cleft teams. The VPD burden in low- and middle-income countries (LMICs) is unknown. This study aims to develop a machine-learning model that can detect the presence of VPD using audio samples alone.

METHODS

Case and control audio samples were obtained from institutional and publicly available sources. A machine-learning model was built using Python software.

RESULTS

The initial 110 audio samples used to test and train the model were retested after format conversion and file deidentification. Each sample was tested 5 times yielding a precision of 100%. Sensitivity was 92.73% (95% CI: 82.41%-97.98%) and specificity was 98.18% (95% CI: 90.28%-99.95%). One hundred thirteen prospective samples, which had not yet interacted with the model, were then tested. Precision was again 100% with a sensitivity of 88.89% (95% CI: 78.44%-95.41%) and a specificity of 66% (95% CI: 51.23%-78.79%).

DISCUSSION

VPD affects nearly 100% of patients with unrepaired overt soft palatal clefts and up to 30% of patients who have undergone palatoplasty. VPD can render patients unintelligible, thereby accruing significant psychosocial morbidity. The true burden of VPD in LMICs is unknown, and likely exceeds estimates from HICs. The ability to access a phone-based screening machine-learning model could expand access to diagnostic, and potentially therapeutic modalities for an innumerable amount of patients worldwide who suffer from VPD.

Incomes to Outcomes: A Global Assessment of Disparities in Cleft and Craniofacial Treatment

OBJECTIVE

Recent investigations focused on health equity have enumerated widespread disparities in cleft and craniofacial care. This review introduces a structured framework to aggregate findings and direct future research.

DESIGN

Systematic review was performed to identify studies assessing health disparities based on race/ethnicity, payor type, income, geography, and education in cleft and craniofacial surgery in high-income countries (HICs) and low/middle-income countries (LMICs). Case reports and systematic reviews were excluded. Meta-analysis was conducted using fixed-effect models for disparities described in three or more studies.

SETTING

N/A.

PATIENTS

Patients with cleft lip/palate, craniosynostosis, craniofacial syndromes, and craniofacial trauma.

INTERVENTIONS

N/A.

RESULTS

One hundred forty-seven articles were included (80% cleft, 20% craniofacial; 48% HIC-based). Studies in HICs predominantly described disparities (77%,) and in LMICs focused on reducing disparities (42%). Level II-IV evidence replicated delays in cleft repair, alveolar bone grafting, and cranial vault remodeling for non-White and publicly insured patients in HICs (Grades A-B). Grade B-D evidence from LMICs suggested efficacy of community-based speech therapy and remote patient navigation programs. Meta-analysis demonstrated that Black patients underwent craniosynostosis surgery 2.8 months later than White patients (P < .001) and were less likely to undergo minimally-invasive surgery (OR 0.36, P = .002).

CONCLUSIONS

Delays in cleft and craniofacial surgical treatment are consistently identified with high-level evidence among non-White and publicly-insured families in HICs. Multiple tactics to facilitate patient access and adapt multi-disciplinary case in austere settings are reported from LMICs. Future efforts including those sharing tactics among HICs and LMICs hold promise to help mitigate barriers to care.

A critical eye on metopic craniosynostosis: A retrospective study assessing orbital dysmorphology as a marker of disease

This investigation sought to ascertain whether orbital morphology could predict genuine metopic craniosynostosis (MCS). The study retrospectively analyzed preoperative three-dimensional computed tomography (3D-CT) scans of patients who underwent surgical correction for MCS. MCS severity was evaluated using the interfrontal angle (IFA). Orbital dysmorphology was assessed based on multiple angles, including supraorbital notches and nasion (SNS), infraorbital foramina and nasion (INI), zygomaticofrontal suture-supraorbital notch-dacryon (ZSD), and orbital long axis (OLA). Results were juxtaposed against age/gender-matched controls and individuals with non-synostotic metopic ridge (MR). The study included 177 patients: 68 MCS, 35 MR, and 74 control subjects. All orbital measurements exhibited significant differences across groups. IFA demonstrated a strong association with all orbital measurements, particularly SNS (B = 0.79, p < 0.001). SNS showed the highest area under the curve among orbital measurements (0.89). Using a 95% sensitivity threshold, the optimal diagnostic angle for SNS was 129.23° (specificity 54%, sensitivity 96%). These findings suggest a correlation between orbital dysmorphology and trigonocephaly severity. The observed dysmorphology manifested in a superomedially accentuated rotational pattern. Importantly, SNS angle predicted MCS, with an angle greater than 130° indicating <5% likelihood of MCS diagnosis. The simplicity of measuring SNS angle on any 3D-CT scan highlights its practical use for assisting with MCS diagnosis.

Orthognathic Considerations of Maxillary and Mandibular Asymmetry at Skeletal Maturity in Patients with Cleft Lip and Palate

BACKGROUND

Improving occlusion and aesthetics is the primary objective of orthognathic surgery for patients with cleft lip and palate (CLP). However, these patients often suffer from horizontal, vertical, and rotational asymmetry in addition to maxillary retrusion. This study aims to describe maxillary and mandibular asymmetry in patients with CLP undergoing orthognathic surgery and analyze its anatomic basis.

METHODS

Patients with isolated CLP undergoing CT imaging prior to orthognathic surgery were retrospectively reviewed. Maxillary and mandibular positioning and dimensional symmetry were evaluated. Incidence of clinically significant asymmetry, correlations between areas of asymmetry, and associations with clinical history were analyzed.

RESULTS

Fifty-eight patients, with mean age 17 years were analyzed, including 32 patients with unilateral CLP and 26 with bilateral CLP. Twenty (34%) patients demonstrated chin deviation ≥4mm and 21 (36%) had a ≥5% discrepancy in mandibular ramus lengths. Horizontal occlusal plane cant of ≥2° was seen in 20 (34%) maxillae and 28 (48%) mandibles, with dental arch yaw ≥2° noted in 32 (55%) of both maxillae and mandibles. Chin deviation correlated with maxillary cant, discrepancy in ramus length, discrepancy in mandibular body length, and discrepancy in condylar volume (p<0.05). Bilateral and unilateral CLP did not show significantly different asymmetry on any measure (p>0.05).

CONCLUSIONS

Both maxillary and mandibular asymmetry is common in skeletally mature patients with CLP and frequently results in notable chin deviation. Preoperative three-dimensional imaging and virtual surgical planning of orthognathic surgery aid in recognition of facial asymmetries and reveal opportunities to optimize results in this population.

ImageAssist: A Novel Smartphone Application for Standardized Clinical Photography That Implements and Automates American Society of Plastic Surgery/Plastic Surgery Foundation Photographic Guidelines With Background Deletion

STATEMENT OF THE PROBLEM

Standardized medical photography of the face is a vital part of patient documentation, clinical evaluation, and scholarly dissemination. Because digital photography is a mainstay in clinical care, there is a critical need for an easy-to-use mobile device application that could assist users in taking a standardized clinical photograph. ImageAssist was developed to answer this need. The mobile application is integrated into the electronic medical record (EMR); it implements and automates American Society of Plastic Surgery/Plastic Surgery Research Foundation photographic guidelines with background deletion.

INITIAL PRODUCT DEVELOPMENT

A team consisting of a craniofacial plastic surgeon and the Health Information Technology product group developed and implemented the pilot application of ImageAssist. The application launches directly from patients' chart in the mobile version of the EMR, EPIC Haiku (Verona, Wisconsin). Standard views of the face (90-degree, oblique left and right, front and basal view) were built into digital templates and are user selected. Red digital frames overlay the patients' face on the screen and turn green once standardized alignment is achieved, prompting the user to capture. The background is then digitally subtracted to a standard blue, and the photograph is not stored on the user's phone.

EARLY USER EXPERIENCE

ImageAssist initial beta user group was limited to 13 providers across dermatology, ENT, and plastic surgery. A mix of physicians, advanced practice providers, and nurses was included to pilot the application in the outpatient clinic setting using Image Assist on their smart phone. After using the app, an internal survey was used to gain feedback on the user experience. In the first 2 years of use, 31 users have taken more than 3400 photographs in more than 800 clinical encounters. Since initial release, automated background deletion also has been functional for any anatomic area.

CONCLUSIONS

ImageAssist is a novel smartphone application that standardizes clinical photography and integrated into the EMR, which could save both time and expense for clinicians seeking to take consistent clinical images. Future steps include continued refinement of current image capture functionality and development of a stand-alone mobile device application.

Psychosocial Status and Self-Perception in Patients with Cleft Lip and/or Palate

OBJECTIVE

To describe how the psychosocial status of patients with cleft lip and/or palate (CL/P) relates to patient-reported outcomes (PROs).

DESIGN

Cross-sectional retrospective chart review.

SETTING

Tertiary care pediatric hospital.

PATIENTS/PARTICIPANTS

Patients aged 8 to 29 years attending cleft team evaluations during a 1-year period.

MAIN OUTCOME MEASURES

CLEFT-Q.

RESULTS

Patients (N = 158) with isolated or syndromic CL/P and mean age 13.4 ± 3.0 years were included. Fifteen (9%) patients had siblings who also had CL/P. Of 104 patients who met with the team psychologist, psychosocial concerns were identified in 49 (47%) patients, including 25 (24%) with Attention-Deficit/Hyperactivity Disorder or behavior concerns, 28 (27%) with anxiety, and 14 (13%) with depression or mood concerns. Younger age and having siblings with cleft were associated with better PROs, while psychosocial concerns were associated with worse PROs on Speech, Psychosocial, and Face Appearance scales.

CONCLUSIONS

Patient perception of cleft outcomes is linked to psychosocial factors.

Putting our heads together: The future of craniopagus twin separation

Computer-assisted design and computer-assisted modeling (CAD/CAM), virtual surgical planning (VSP) and augmented/virtual reality (AR/VR) aid our ability to plan and perform complex craniofacial procedures. This study seeks to define the role of the aforementioned techniques in the separation of craniopagus conjoined twins. Six teams were identified who had successfully performed craniopagus twin separation with the use of CAD/CAM, VSP and/or AR/VR. Surgeons involved in separating craniopagus twins have increasingly utilized tools such as CAD/CAM models, VSP and AR/VR to plan and execute successful separation, and these tools are associated with higher success rates than historical controls.

Sociodemographic Factors Predict Long-Term Attrition from Multidisciplinary Cleft Clinic

OBJECTIVE

Identify and describe factors associated with retention and attrition of patients during longitudinal follow-up at multidisciplinary cleft clinic.

DESIGN

Retrospective cohort study.

SETTING

Single, tertiary care center.

PATIENTS, PARTICIPANTS

Patients born between 1995 and 2007 with a diagnosis of cleft palate with or without cleft lip attending multidisciplinary cleft clinic.

INTERVENTIONS

None tested, observational study.

MAIN OUTCOME MEASURE(S)

Age at last clinical appointment with a multidisciplinary cleft team provider. Attrition was defined as absence of an outpatient appointment following 15 years of age.

RESULTS

Six hundred seventy-eight patients were included. The average age at last appointment across the entire cohort was 13.1 years (IQR 6.6-17.2). Patients who were Black (HR 1.60, 95% CI 1.10-2.32, p = 0.014) and other races (HR 1.90, 95% CI 1.22-2.98, p = 0.004) were more likely to be lost to follow-up compared to white patients. Publicly insured patients were more likely to experience attrition than those who were privately insured (HR 1.30, 95% CI 1.03-1.65, p = 0.030). Estimated income was not significantly associated with length of follow-up (p = 0.259). Those whose residence was in the fourth quartile of driving distance from our center experienced loss to follow-up significantly more than those who lived the closest (HR 2.04, 95% CI 1.50-2.78, p < 0.001).

CONCLUSIONS

There is a high degree of follow-up attrition among patients with cleft lip and palate. Race, insurance status, and driving distance to our center were associated with attrition in a large, retrospective cohort of patients who have reached the age of cleft clinic graduation.

Severity of Mandibular Dysmorphology in Treacher Collins Syndrome for Stratification of Perioperative Airway Risk

BACKGROUND

Patients with Treacher Collins syndrome (TCS) and attendant airway dysmorphology may be predisposed to airway complications in the perioperative period. However, limited data correlates severity of mandibular hypoplasia and airway status. This study aims to improve risk stratification for perioperative airway insufficiency in TCS by using a previously proposed mandibular severity index.

METHODS

Patient demographics, perioperative airway status, difficulty of intubation, and Cormack Lehane grade were collected and compared using a TCS mandibular hypoplasia severity grading scale in patients with TCS treated between 2000 and 2022.

RESULTS

Twenty-six patients underwent 222 procedures with institutional mandibular severity gradings as follows: 23% Grade I, 31% Grade II, 39% Grade III, 8% Grade IV. Our severity index was associated with intubation difficulty ( P <0.001) and difficult airway status ( P <0.001), with 72% of difficult airways found in grade III and grade IV patients. Mandibular retrusion and ramal hypoplasia subscores were positively correlated with measures of airway severity ( P <0.001), whereas the gonial angle was negatively correlated ( P <0.001). Age was negatively correlated with difficult visualization for endotracheal intubation ( P =0.02) but had no association with difficult airway status ( P =0.2).

CONCLUSIONS

This study found a positive correlation between severity of maxillomandibular dysmorphology and perioperative airway difficulty in TCS patients. Our findings suggest that severely affected patients require heightened vigilance throughout life, as difficult airways may not completely resolve with aging. Given the risk of morbidity and mortality associated with airway complications, proper identification and preparation for challenging airways is critical for TCS patients.

Oxycephaly-systematic review, case presentation, and diagnostic clarification

PURPOSE

Oxycephaly is a specific phenotype of multi-suture craniosynostosis that is often misrepresented. This study aims to review the relevant literature, clarify the diagnostic criteria, and present an alternate approach to its management.

METHODS

Published literature regarding oxycephaly was reviewed from 1997, when the largest series was published, until 2022. All cases at a single institution were then retrospectively reviewed.

RESULTS

Over the last 25 years, four studies met the inclusion criteria, none of which specifically defined oxycephaly. One case, in one study, was potentially consistent with the phenotype. An institutional review yielded two patients who met the original diagnostic criteria set forth by Renier and Marchac. Both patients had unexplained speech delays, mild retinal nerve fiber layer thickening, and diffuse inner table scalloping, along with the characteristic oxycephalic phenotype. One patient also had a direct intracranial pressure (ICP) measurement of 25 mmHg, and the other had a Chiari I malformation. Both were treated with posterior vault distraction osteogenesis (PVDO) to alleviate the cephalo-cranial disproportion while simultaneously allowing for turricephaly correction.

CONCLUSIONS

Oxycephaly presents with late onset multi-suture fusion. Patients have patent sutures at birth. Midface hypoplasia and known syndromic associations are absent. Patients demonstrate supraorbital recession, an obtuse fronto-nasal angle, and turricephaly without substantial brachycephaly. Over 60% of patients have symptomatic ICP elevation, the presentation of which ranges from headaches to rapidly progressive blindness. This rare form of craniosynostosis is particularly virulent and likely often missed due to diagnostic ambiguity and its relatively mild phenotype.

Pharyngeal Airway Changes Following Mandibular Distraction Osteogenesis as Evaluated with Laryngoscopy

PURPOSE

Mandibular distraction osteogenesis (MDO) may improve airway grade in patients with Robin Sequence (RS), but little is known about the response of the oropharyngeal airway to the distraction process in cases of tongue base obstruction (TBAO). This study used drug-induced sleep endoscopy (DISE) to evaluate the impact of MDO on the oropharynx.

METHODS

RS patients with severe obstructive sleep apnea (OSA) were prospectively enrolled, and underwent DISE prior to MDO, and at the time of distractor removal. Laryngoscopy views, glossoptosis degree, polysomnography (PSG) results, oxygen saturations and airway measurements were compared pre- and post-MDO.

RESULTS

Twenty patients met inclusion criteria. At the time of distractor placement, a grade II laryngoscopic view was most frequently observed (63%), and one patient (5%) had a grade I view. Median obstructive apnea hypopnea index (OAHI) improved after MDO (49.1 [30.2-74.0] to 9.1, [3.9-18.0], p ≤ .001). Median oxygen saturation nadir also improved (preoperative 69% [60-76] to 85% [82-91], p ≤ .001). At distractor removal, mean laryngoscopic view improved (p ≤ .002) with no views that were grade 3 or higher. Median intraoperative oropharyngeal width improved, (3.1 mm [2.8-4.4] to 6.0 mm [4.4-6.8], p ≤ .021), as did median cephalometric anteroposterior oropharyngeal width (3.5 mm [2.7-4.1] to 6.3 mm [5.6-8.2], p ≤ .002).

CONCLUSION

Following MDO, RS patients with TBAO have an approximate doubling of oropharyngeal width and an improvement in laryngoscopic grade. These findings likely contribute to improved oxygenation, OAHI and ease of intubation.

(Epi)genotype and Timing of Tongue Reduction Predict Safety and Long-Term Outcomes in Beckwith-Wiedemann Syndrome

INTRODUCTION

Macroglossia is a cardinal feature of Beckwith-Wiedemann syndrome (BWS) with a clinical spectrum where the indication and timing for surgery remain to be validated. This study leverages a cohort of molecularly characterized patients with BWS to correlate epigenetic diagnosis with phenotype and treatment outcome.

METHODS

Patients with BWS seen in consultation for macroglossia from 2009-2022 were reviewed for phenotype, molecular diagnosis, tongue reduction status, timing of surgery (early = under 12 months), and perioperative complications.

RESULTS

Two hundred thirty-seven patients were included. Imprinting control region 2 loss of methylation (IC2 LOM) was the most common epigenotype (61%). Paternal uniparental isodisomy for chromosome 11 (pUPD11) comprised a larger proportion of patients undergoing tongue reduction (18%) than those not undergoing surgery (8%, p = 0.024) and was associated with need for repeat surgery (OR 4.49, 95% CI 1.06-18.98, p = 0.041). Complications including wound dehiscence, ventilator associated pneumonia, and unplanned extubation were more common in patients undergoing early surgery (20%) than late surgery (4%, OR 5.70, 95% CI 1.14-28.55, p = 0.034).

CONCLUSIONS

This study presents one of the largest cohorts correlating molecular diagnosis with clinical course of macroglossia treatment in BWS. Macroglossia in patients with pUPD11 is associated with higher rates of reoperation. Relief of obstructive sleep apnea with early tongue reduction must be weighed against risk of perioperative complications, most of which are non-surgical. This study highlights how molecular diagnosis advances clinical care by risk stratifying clinical outcomes in a center providing integrated multidisciplinary care for the BWS population.

Genetic Subtypes of Apert Syndrome Are Associated With Differences in Airway Morphology and Early Upper Airway Obstruction

BACKGROUND

Apert syndrome is predominantly caused by 2 paternally inherited gain-of-function mutations in the FGFR2 gene, Pro253Arg, and Ser252Trp. Studies comparing phenotypic features between these 2 mutations have established differences in syndactyly severity and incidence of cleft palate. Obstructive sleep apnea can be debilitating in a subset of patients with Apert syndrome, yet is not well understood. This study aims to determine whether FGFR2 mutations impart differential effects on airway physiology and morphology.

METHODS

Patients with Apert syndrome and confirmatory molecular testing were reviewed for polysomnography, nasal endoscopy, microlaryngoscopy and bronchoscopy, and computed tomography imaging. Obstructive apnea-hypopnea index and oxygen saturation nadir, nasal airway volumes, choanal cross-sectional area, and midfacial cephalometric dimensions were compared across mutation types.

RESULTS

Twenty-four patients (13 Ser252Trp, 11 Pro253Arg) were included. Severe obstructive sleep apnea (obstructive apnea-hypopnea index>10) occurred in 8 (62%) patients with Ser252Trp mutations compared with 1 (9%) patient with Pro253Arg mutations ( P =0.009). Computed tomography imaging at 1 year of age demonstrated that nasopharyngeal airway volumes were 5302±1076 mm 3 in the Ser252Trp group and 6832±1414 mm 3 in the Pro253Arg group ( P =0.041). Maxillary length (anterior nasal spine-posterior nasal spine, P =0.026) and basion-anterior nasal spine ( P =0.007) were shorter in patients with Ser252Trp mutations.

CONCLUSIONS

The findings suggest that the Ser252Trp mutation in Apert syndrome is associated with higher severity obstructive sleep apnea and decreased nasopharyngeal airway volume. Heightened clinical awareness of these associations may inform treatment planning and family counseling.

Associations Between Medicaid Expansion and Timely Repair of Cleft Lip and Palate

The expansion of Medicaid under the Affordable Care Act (ACA) increased access to health care for many low-income children. However, the impact of this expansion on the timing of primary cleft lip and palate repair remains unclear. This study aimed to evaluate whether Medicaid expansion improved access to timely cleft lip and palate repair and whether it reduced preexisting ethnoracial disparities. Using a quasi-experimental design, the study analyzed data from 44 pediatric surgical centers across the United States. The results showed that Medicaid expansion was associated with a 9.0 percentage-point increase in delayed cleft lip repairs, resulting in an average delay of 16 days. Non-White patients were disproportionately affected by this delay, experiencing a 14.8 percentage-point increase compared with a 4.9 percentage-point increase for White patients. In contrast, Medicaid expansion had no significant effect on the timing of palate repair or on ethnoracial disparities in palate repair. The study underscores the importance of monitoring unintended consequences of large-scale health system changes, especially those affecting disadvantaged populations. Delayed cleft lip repair can lead to worse outcomes for patients, and the disproportionate impact on non-White patients is concerning. Further research is needed to identify the reasons for this delay and to mitigate its effects. Overall, the study highlights the need for ongoing vigilance to ensure that health care policies and interventions do not inadvertently worsen health disparities.

How does CLEFT-Q change the way we practice? A prospective study integrating patient-reported outcomes

OBJECTIVE

The CLEFT-Q is a validated instrument designed to elicit patient-reported outcomes among people affected by cleft lip and/or palate. However, it has not been reported how use of CLEFT-Q data alters routine cleft care. This study analyzed the impact of CLEFT-Q data integration on patient care and clinical decision making.

METHODS

Patients were sequentially, prospectively evaluated during scheduled cleft team visits. The CLEFT-Q was completed prior to the clinic encounter but results were initially masked from the surgeon and family. In the encounter, a study observer characterized patients' verbalized attitudes across seven specific domains of appearance and function and the provisional assessment and plan was noted. CLEFT-Q data was then introduced in the clinical encounter and discussed. Discordance between patients' initially verbalized attitudes and their self-reported scores on the CLEFT-Q was documented along with any resultant modifications to their care plan.

RESULTS

Seventy patient visits were observed; mean patient age was 12.7 years (range 8-19). Forty-one patients (59%) had cleft lip and palate/alveolus and 29 (41%) had isolated cleft palate. Discordance was observed in 36% of visits and in 9.2% of specific domains assessed. Highest discordance rates were observed in domains of psychosocial function (12.5%,) speech function/distress (11.6%,) and lips/lip scar appearance (11.6%). No age group or gender was associated with increased discordance. Integration of CLEFT-Q results altered the assessment and plan in 11 (16%) visits.

CONCLUSIONS

The CLEFT-Q provides clinically-relevant insight into patient perspectives that are not captured by routine interview and examination alone, and regularly leads to a change in the management plan.

Associations between the timing of tongue reduction surgery, (Epi)genotype, and dentoskeletal development in patients with Beckwith-Wiedemann syndrome

Tongue reduction surgery is often pursued to manage the adverse effects of macroglossia in patients with Beckwith-Wiedemann syndrome (BWS). This study characterized dental outcomes in patients with BWS based on surgical timing and molecular diagnosis. A retrospective study was designed to include patients with BWS over the age of two who had clinical or radiographic documentation of dental development. Patients were grouped by history of tongue reduction surgery and surgical timing (early: <12 months). One hundred three patients were included (55 no tongue reduction, 18 early, 30 late). Patients who underwent late surgery had lower odds of class I occlusion (OR 0.11, 95% CI 0.02-0.58, p = 0.009) and higher odds of anterior open bite (OR 7.5, 95% CI 1.14-49.4, p = 0.036). Patients with clinical diagnoses and negative molecular testing had anterior open bite less frequently than patients with imprinting center 2 loss of methylation and paternal uniparental isodisomy of 11p15.5 (p = 0.009). Compared to reference values, patients who had tongue reductions had an increased mandibular plane angle (32.0 ± 4.5° versus 36.9 ± 5.0°, p = 0.001), indicative of hyperdivergent growth. The results of this study help to understand the complex nature of dentoskeletal growth in BWS and shed insight on how surgical timing and molecular diagnosis influence prognosis.

Long-Term Patient-Reported Outcomes in Internationally Adopted Children with Cleft Lip and Palate

OBJECTIVE

To compare patient-reported outcomes (PROs) in internationally adopted patients with cleft lip and palate to those in non-adopted peers.

DESIGN

Cross-sectional study.

SETTING

Multidisciplinary cleft team at tertiary care hospital.

PATIENTS

Patients aged ≥ 8 with cleft lip and palate attending routine cleft team evaluations September 2021 - September 2022.

MAIN OUTCOME MEASURE

CLEFT-Q PRO scores.

RESULTS

Sixty-four internationally adopted patients and 113 non-adopted patients with a mean age of 13 years were included. Compared to non-adopted peers, adopted patients demonstrated worse satisfaction with face appearance (mean 59 vs. 66, p = .044), speech function (mean 69 vs. 78, p = .005), and speech distress (mean 80 vs. 84, p = .032). No significant differences were observed on the nose, nostrils, teeth, lips, lip scar, jaws, psychological function, or social function scales (p > .05). Objective clinical evaluation corroborated these findings, with adopted patients demonstrating worse Pittsburgh Weighted Speech scores (mean 3.0 vs 1.9, p = .027) and greater incidence of articulation errors (64% vs 46%, p = .021). No significant differences were observed in rates of mood, anxiety, or behavior concerns identified on psychosocial assessment (p = .764). Among adopted patients, undergoing palatoplasty prior to adoption was associated with worse satisfaction with speech, appearance, school, and social function (p < .05).

CONCLUSIONS

Patient-reported outcomes among internationally adopted adolescents and young adults with cleft lip and palate show slightly lower satisfaction with facial appearance and speech but otherwise demonstrate similar results to non-adopted peers on most appearance and psychosocial measures. PRO data correlated well with objective speech assessment and did not portend worse psychosocial function.

Radiographic Evidence of Dental Complications Following Mandibular Distraction Osteogenesis: Inverted-L versus Oblique Osteotomy

INTRODUCTION

Patients with micrognathia undergoing mandibular distraction osteogenesis (MDO) for functional and aesthetic improvement are at significant risk for dental complications. This study investigates association of two osteotomy patterns-oblique and inverted-L-with risk to developing dentition.

METHODS

Our senior orthodontist performed a retrospective review of dental radiographs of patients undergoing MDO with confirmed oblique or inverted-L osteotomies between 2012 and 2022. Images were assessed for evidence of missing, damaged, or displaced teeth, and proportion of affected hemimandibles by injury type and median number of affected teeth per hemimandible were compared between groups using appropriate statistical methodology.

RESULTS

Analysis included 44 patients (23 oblique, 21 inverted-L) and 85 hemimandibles (45 and 40). Mean age at surgery was 3.1±4.6 years, and mean time to imaging was 4.9±4.1 years; there was no difference between groups (p=0.23, p=0.34, respectively). Oblique osteotomy was associated with greater odds of missing teeth (OR 13.3, p<0.001), damaged teeth (OR 3.2, p=0.02), and any dental injury (OR 39.9, p<0.001) compared to inverted-L, as well as greater number of missing teeth (β=0.6, p<0.01), damaged teeth (β=0.3, p=0.02), and total number of affected teeth (β=0.9, p<0.001). There was no difference in incidence (p=0.5) or number (p=0.4) of displaced teeth between groups.

CONCLUSION

Inverted-L osteotomies were associated with fewer dental complications as compared to oblique osteotomy at all ages studied. While longer-term follow up and prospective data are needed prior to making definitive recommendations, this data is helpful to surgeons as they plan MDO.

Long-Term Outcomes and Growth Analysis of Costochondral Grafts for Hemifacial Microsomia: 24-Year Experience of a Single Surgeon

BACKGROUND

Costochondral grafts (CCGs) can be used in mandibular reconstruction of Kaban-Pruzansky IIB/III hemifacial microsomia (HFM). Their growth is variable, occasionally necessitating secondary surgery. This study examined one surgeon's 24-year experience to better quantify long-term outcomes and surgical care required in CCG reconstruction of HFM mandibles.

METHODS

Serial three-dimensional computed tomography scans, from preoperative to most recent, were analyzed in patients with minimum four years of clinical follow-up following CCG reconstruction. Graft/ramus height, length, volume, bilateral mandibular body length, and chin deviation were measured. Changes in measurements were analyzed at preoperative, immediate postoperative, most recent imaging prior to secondary surgery, and most recent imaging overall. Growth rates per measure were calculated utilizing scans after CCG, but before secondary surgery.

RESULTS

Thirteen patients were analyzed. Median clinical follow-up was 10.0 (5.1) years. One patient developed temporomandibular joint ankylosis secondary to stacked-graft malposition, which was repaired without further complications. CCG reconstruction led to immediate improvement in graft/ramus height (p=0.03), length (p=0.002), and volumetric symmetry (p=0.02). No difference was found between graft and native ramus height (p=0.4) and length measures (p=0.5), while graft volume and affected mandibular body grew significantly more slowly. By latest imaging, 63% of patients required secondary surgery, including distraction osteogenesis and/or orthognathic surgery due to differential graft/hemimandible growth behavior. By most recent clinical follow-up, this proportion increased to 93%.

CONCLUSION

CCGs provide significant short-term mandibular and facial symmetry improvement in HFM IIB/III. Long-term analysis reveals frequent undergrowth requiring secondary intervention to promote and maintain symmetry.

Kaban-Pruzansky Grade Predicts Airway Severity in Hemifacial Microsomia

BACKGROUND

Children born with hemifacial microsomia (HFM) can suffer from airway compromise. There is a paucity of data correlating degree of HFM severity with airway difficulty. This study aims to determine the relationship between degree of micrognathia and airway insufficiency in the HFM population.

METHODS

Patient demographics, airway function, Kaban-Pruzansky (KP) grade, and Cormack Lehane (CL) grade were collected and compared with appropriate statistics for HFM patients treated between 2000 and 2022.

RESULTS

Seventy patients underwent 365 operations with KP grading as follows: 34% I, 23% IIA, 11% IIB, and 33% grade III. Goldenhar syndrome was present in 40% of patients and 16% had bilateral disease. KP grade (p<0.001) predicted mean number of airway-affecting procedures undergone and difficult airway status (p<0.001), with 75% of difficult airways in KP III patients. There was no association of airway compromise with Goldenhar syndrome, laterality, or age (p>0.05). Most CL grades were I (61%) or IIA (13%), with fewer IIB, III, and IV (4-7%). KP grade predicted CL grade (p<0.001), with 71% of grade IV views and 64% of grade III views seen in KP III patients.

CONCLUSIONS

Kaban-Pruzansky grade correlated with airway severity in HFM. Patients do not appear to outgrow their CL grade, as previously hypothesized, suggesting that KP III patients remain at increased risk for airway insufficiency into the teen years. Given the potential significant morbidity associated with airway compromise, proper identification and preparation for challenging airway is a critical part of caring for patients with HFM.

Utilization of carbonated calcium phosphate cement for contouring cranioplasty in patients with syndromic craniosynostosis

PURPOSE

Carbonated calcium phosphate (CCP) cement is an alloplastic material which has been increasingly utilized for cranioplasty reconstruction; however, there is a paucity of data investigating its use in patients with syndromic craniosynostosis. The purpose of this study was to characterize our institutional experience with CCP cement for secondary contouring cranioplasty in these patients to establish safety and aesthetic efficacy.

METHODS

Patients with syndromic craniosynostosis undergoing cranioplasty with CCP cement from 2009 to 2022 were retrospectively reviewed for prior medical and surgical history, cranioplasty size, cement usage, and postoperative complications. Aesthetic ratings of the forehead region were quantified using the Whitaker scoring system at three timepoints: preoperative (T1), < 6 months postoperative (T2), and > 1 year postoperative (T3).

RESULTS

Twenty-one patients were included. Age at surgery was 16.2 ± 2.8 years, forehead cranioplasty area was 135 ± 112 cm², and mass of cement was 17.2 ± 7.8 g. Patients were followed for 3.0 ± 3.1 years. Whitaker scores decreased from 1.9 ± 0.4 at T1 to 1.4 ± 0.5 at T2 (p = 0.005). Whitaker scores at T2 and T3 were not significantly different (p = 0.720). Two infectious complications (9.5%) were noted, one at 4.5 months postoperatively and the other at 23 months, both requiring operative removal of CCP cement.

CONCLUSION

Our results suggest that aesthetic forehead ratings improve after CCP contouring cranioplasty and that the improvement is sustained in medium-term follow-up. Complications were uncommon, suggesting that CCP is relatively safe though longer-term follow-up is needed before reaching definitive conclusions.

Characterizing Interventions and Family Assistance of a Nurse Navigation Program in Orofacial Cleft Care

OBJECTIVE

Characterize the interventions and assistance employed by a cleft nurse navigator (CNN) which have mediated improvement in care equity at our institution.

DESIGN

Retrospective study.

SETTING

Academic tertiary care center.

PATIENTS, PARTICIPANTS

Patients presenting with cleft lip and/or cleft palate presenting between August 2020 and August 2021 with exclusions for syndromic diagnosis, Pierre-Robin sequence, late (> 6 months) presentation, and prior cleft surgery at outside institutions.

INTERVENTIONS

Multidisciplinary cleft nurse navigator program.

MAIN OUTCOME MEASURE(S)

Family interactions with the CNN by phone, text, and email across the first year of life including feeding support, nasoalveolar molding (NAM) assistance, appointment scheduling, financial assistance, addressing perioperative concerns, and facilitating physician consults. Patient weight and surgical timing were also recorded.

RESULTS

Sixty-nine patients were included with a total of 639 interactions between the CNN and families. Scheduling support (30%), addressing perioperative concerns (22%), and feeding support (20%) were the most common interactions. Feeding support and NAM assistance were heavily distributed in the first 3 months of life compared to after 3 months (P < .001). Median age at first contact was 1 week (range: 22 weeks gestation-14 weeks). There was no difference in the proportion of families receiving feeding support, NAM assistance, or scheduling assistance based on insurance status or race (P > .05 for all).

CONCLUSIONS

Scheduling assistance, addressing perioperative concerns, and feeding support are the predominant methods by which the CNN interacts with and assists families of patients with cleft conditions. CNN service distribution is largely equitable between demographic groups.

Intrauterine closure of myelomeningocele defects with primary linear repair versus bipedicle fasciocutaneous flaps: a post-MOMS cohort study with long-term follow-up

OBJECTIVE

The objective of this study was to determine the effects of in utero bipedicle flaps on maternal-fetal morbidity/mortality, the need for CSF diversion, and long-term functional outcomes.

METHODS

Eighty-six patients who underwent fetal myelomeningocele repair from 2011 to 2021 at a single institution were reviewed. Primary outcomes included intrauterine fetal demise, postnatal death, postnatal myelomeningocele repair dehiscence, and CSF diversion by final follow-up.

RESULTS

The cohorts were no different with regard to race, ethnicity, maternal age at fetal surgery, body mass index, gravidity, parity, gestational age at fetal surgery, estimated fetal weight at fetal surgery, or fetal lesion level. Of the 86 patients, 64 underwent primary linear repair and 22 underwent bipedicle flap repair. There were no significant differences in rates of intrauterine fetal demise, postnatal mortality, midline repair site dehiscence, or the need for CSF diversion by final follow-up. Operative times were longer (32.5 vs 18.7 minutes, p < 0.001) and gestational age at delivery was lower (232 vs 241 days, p = 0.01) in the bipedicle flap cohort, but long-term functional outcomes were not different.

CONCLUSIONS

Analysis of the total cohort affirms the long-term benefits of fetal myelomeningocele repair. In utero bipedicle flaps are safe and can be used for high-tension lesions without increasing perioperative risks to the mother or fetus. In utero flaps preserve the long-term benefits seen with primary linear repair and may expand inclusion criteria for fetal repair, providing life-changing care for more patients.

Perspectives of Orthopedic Surgery Program Directors on the USMLE Step 1 Scoring Change

The orthopedic surgery residency application process is highly competitive, and residency programs rely on objective measures, such as the United States Medical Licensing Examination (USMLE) Step 1 score, to assist in applicant selection. To deemphasize standardized test scores and improve student well-being, governing bodies have elected to change the Step 1 examination to a pass/fail grading system beginning in 2022. Given the utility of Step 1 in the orthopedic surgery residency application process, this change will significantly affect how applicants are assessed. To determine how this change will affect the process, we developed and validated a 19-item anonymous electronic survey and invited program directors (PDs) from orthopedic surgery residency programs accredited by the Accreditation Council for Graduate Medical Education to respond. The 86 surveys that were completed represented a 43.2% response rate (86 of 199). Only 4.7% of orthopedic surgery PDs believe that this change is a good idea, and 91.7% of PDs believe that the change will make it more difficult to compare applicants objectively. In addition, 90.7% of PDs report that they will increase emphasis on the Step 2 CK (clinical knowledge) examination in comparing residency applicants for their program, with 90.4% of PDs reporting that they will require students to submit their Step 2 scores via the Electronic Residency Application Service. These results indicate that changing the Step 1 scoring to pass/fail is unpopular among orthopedic surgery PDs. Further, losing the numeric Step 1 score will increase reliance on Step 2 scores and emphasis on less objective measures, such as where an applicant attended medical school. [Orthopedics. 2022;45(5):e257-e262.].

Resorbable Versus Titanium Rigid Fixation for Pediatric Mandibular Fractures: A Systematic Review, Institutional Experience and Comparative Analysis

Study Design

Pediatric mandible fractures mandate special consideration because of unerupted teeth, mixed dentition, facial growth and the inability to tolerate maxillomandibular fixation. No consensus exists as to whether resorbable or titanium plating systems are superior with regards to clinical outcomes.

Objective

This study aims to systematically review and compare the outcomes of both material types in the treatment of pediatric mandible fractures.

Methods

After PROSPERO registration, studies from 1990-2020 publishing on outcomes of ORIF of pediatric mandible fractures were systematically reviewed according to PRISMA guidelines. An additional retrospective review was conducted at a pediatric level 1 trauma center.

Results

1,144 patients met inclusion criteria (30.5% resorbable vs. 69.5% titanium). Total complication rate was 13%, and 10% required a second, unplanned operation. Complication rates in the titanium and resorbable groups were not significantly different (14% vs. 10%; P = 0.07), and titanium hardware was more frequently removed on an elective basis (P < 0.001). Condylar/sub-condylar fractures were more often treated with resorbable hardware (P = 0.01); whereas angle fractures were more often treated with titanium hardware (P < 0.001). Within both cohorts, fracture type did not increase the risk of complications, and comparison between groups by anatomic level did not demonstrate any significant difference in complications.

Conclusions

Pediatric mandible fractures requiring ORIF are rare, and hardware-specific outcomes data is scarce. This study suggests that titanium and resorbable plating systems are equally safe, but titanium hardware often requires surgical removal. Surgical approach should be tailored by fracture anatomy, age-related concerns and surgeon preference.

Otolaryngology Program Director, House-Staff, and Student Opinions: Step 1 Pass/Fail Score Reporting

OBJECTIVE(S)

To compare otolaryngology program director, house-staff, and medical student perspectives on the score reporting change of USMLE Step 1 to pass/fail.

METHODS

Separate electronic surveys were sent to program directors of ACGME-accredited otolaryngology programs (Cronbach's alpha = .87), otolaryngology house-staff (Cronbach's alpha = .91), and medical students interested in otolaryngology (Cronbach's alpha = .76).

RESULTS

Among the 51 otolaryngology program directors that completed the survey (response rate of 46.8%), 17.6% favored reporting USMLE Step 1 as pass/fail. A majority believed the reporting change would make it more difficult to screen (74.5%) and objectively compare applicants (82.4%). Step 2 CK scores will be more important to most program directors due to the reporting change (83.7%). Of the 93 house-staff that completed surveys, most did not favor the reporting change (61.3%). Over half (54.0%) of the 87 medical students that completed surveys did not support the scoring change, and most (65.5%) did not feel that it would decrease anxiety around residency applications (65.5%). Most house-staff and medical students felt that the scoring change would put non-U.S. MD students at a disadvantage (65.6% of house-staff, 69.8% of medical students).

CONCLUSION

Most survey respondents do not agree with the decision to report Step 1 as pass/fail. Despite its intended goals, most do not believe pass/fail Step 1 reporting will improve medical student well-being and believe it will put certain student populations at a greater disadvantage.

Orphaned Trainees: A Vulnerable Population in an Inequitable System

Two years ago, Hahnemann University Hospital (HUH) closed, orphaning the largest group of trainees in the history of graduate medical education (GME). Last month, the plastic surgery community learned of the forthcoming closure of two plastic surgical residencies (2.4% of all integrated plastic surgery residencies), while most programs were in the final stages of planning the 2021-2022 academic year. Recounting the turmoil experienced by orphaned HUH trainees and their families, left alone to relocate amidst funding-related legal battles, one cannot help but wonder, how could this happen again? Trainees deserve transparency, funding protection and support when training programs close or lose accreditation. Moreover, applicants deserve to know if a program is on the brink of collapse before they sign their rank list. Applicants and trainees deserve to have their funding protected in the event of a program closure, so their ability to relocate is not held hostage by a sponsoring institution. Trainees deserve to be supported by a central organization that is responsible their relocation in the event of an orphanage. These changes are overdue and their absence has already resulted in academic and emotional adversities for trainees and their families.

Comprehensive Reform and Greater Equity in Applying to Residency-Trainees' Mixed Responses to a Pass/Fail USMLE Step 1

BACKGROUND

Pass/fail USMLE Step 1 score reporting may have varying implications for trainees of different demographic and training backgrounds.

OBJECTIVE

To characterize the perspectives of a diverse cohort of trainees on the impact of pass/fail Step 1 score reporting.

METHODS

In 2020, 197 US and international medical school deans and 822 designated institutional officials were invited to distribute anonymous electronic surveys among their trainees. Separate surveys for medical students and residents/fellows were developed based on the authors' prior work surveying program directors on this topic. Underrepresented in medicine (UiM) was defined in accordance with AAMC definitions. Descriptive and comparative analyses were performed, and results were considered statistically significant with P < .05.

RESULTS

A total of 11 633 trainees responded (4379 medical students and 7254 residents/fellows; 3.3% of an estimated 285 000 US trainees). More students favored the score reporting change than residents/fellows (43% vs 31%; P < .001; 95% CI 0-24). Trainees identifying as UiM were more likely to favor the change (50% vs 34%; P < .001; 95% CI 0-32) and to agree it would decrease socioeconomic disparities (44% vs 25%; P < .001; 95% CI 0-38) relative to non-UiM trainees. Nearly twice as many osteopathic and international medical graduate students felt they would be disadvantaged compared to MD students because of pass/fail score reporting (61% vs 31%; P < .001; 95% CI 0-60).

CONCLUSIONS

Trainee perspectives regarding USMLE Step 1 score reporting are mixed. UiM trainees were more likely to favor the score reporting change, while osteopathic and international medical students were less in favor of the change.

Managing Bilateral Oro-Sino-Orbital Fistulae in the Setting of Bilateral Tessier IV Clefts

ABSTRACT

The number IV orofacial cleft is extremely rare, and reports on long-term outcomes are limited. Here we present the management of a child born with bilateral Tessier number IV clefts and microphthalmia, who developed bilateral oro-sino-orbital fistulae. He presented 8 years after his index procedure with persistent ocular drainage and radiographic evidence of bilateral oro-sino-orbital fistulae. His globes maintained light perception, and in order to protect them from chemical reflux he underwent fistula obliteration with demineralized bone matrix and acellular dermal matrix. His orbits were reconstructed by Imre and conjunctival flaps. In the presence of marginally functioning globes, the importance of timely intervention is critical in order to preserve residual ocular function. Light perception vision assists in the maintenance of circadian rhythm and physiologic functions that are critical to the developing pediatric patient. This case also emphasizes the importance of a multi-disciplinary team in the correction of complex craniofacial deformities.

Pediatric Orbital Entrapment: Radiographic Findings and Their Predictive Values

INTRODUCTION

Although orbital fractures are less common in children than adults, the literature suggests that orbital entrapment occurs more frequently in the pediatric population. Orbital entrapment is an emergency, and early diagnosis and prompt management are critical. Specific radiographic manifestations such as herniation of extraocular muscles (EOMs) through orbital fractures have led to increased suspicion and overdiagnosis of orbital entrapment. This study evaluated the value of specific radiographic findings in predicting clinical findings after pediatric orbital floor fractures.

METHODS

A retrospective review at a pediatric level 1 trauma center was performed. ICD-9 and ICD-10, codes identified patients with orbital fractures. Computed tomography (CT) reports were queried for the following terms: "herniation," "herniated," "entrapped," and "entrapment." Patients 16 years and older were excluded, as were all patients who were unable to undergo EOM evaluation on presentation. Electronic medical records were reviewed for fracture type, mechanism of injury, clinical and radiographic findings, surgical interventions, and demographic information. Medical diagnosis tests, including positive and negative predictive values, sensitivity, as well as specificity, were calculated to identify the relationship between radiographic findings and specific symptomology.

RESULTS

One hundred fifty-three patients with 265 orbital fractures were included. "Entrapment" was mentioned in 34.6% of CT reports, whereas the incidence of clinical entrapment was 12.4% (19/153). Radiographic fat herniation, EOM herniation, and EOM irregularity had positive predictive values of 25%, 31%, and 10%, respectively, for clinical entrapment diagnosis at the initial examination. Overall, 32.7% (50/153) of patients with orbital fractures required surgery.

CONCLUSIONS

Although the radiographic description of soft tissue herniation has become interchangeable with entrapment, these CT findings alone are poorly predictive. Orbital entrapment should be diagnosed preoperatively by physical examination, with radiographs as an adjunct only. Radiographic statements without clinical correlation may lead to the improper management of pediatric facial trauma patients.

The Change of USMLE Step 1 to Pass/Fail: Perspectives of the Surgery Program Director

OBJECTIVE

This study sought to evaluate the perspectives of surgical program directors regarding the change of USMLE Step 1 to pass/fail grading.

DESIGN

Validated electronic survey.

SETTING

Vanderbilt University Medical Center Department of Plastic Surgery.

PARTICIPANTS

Program directors of all ACMGE-accredited General Surgery, Integrated Vascular Surgery, Integrated Thoracic Surgery, and Integrated Plastic Surgery residency programs.

RESULTS

The overall response rate was 55.5%. Most PDs (78.1%) disagreed with the scoring change. Only 19.6% believe this change will improve medical student well-being. For 63.5% of PDs, medical school pedigree will become more important, and 52.7% believe it will place international medical graduates at a disadvantage. Only 6.2% believe Step 2 CK should also be pass/fail, while 88.7% will increase the weight of Step 2 CK and 88.4% will now require Step 2 CK score submission with the electronic residency application service.

CONCLUSIONS

While well-intentioned, changing USMLE Step 1 to pass/fail may have unintended consequences and may disadvantage certain groups of applicants. The emphasis on Step 1, and resulting test-taking apprehension, will likely shift to Step 2 CK. Proponents of equitable evaluation should direct their efforts toward increasing, not decreasing, the number of objective measures available for student assessment.

Pneumoscrotum: Value as an early diagnostic sign of tension pneumothorax in blunt thoracic trauma

Pneumoscrotum is a rare complication that can result from various etiologies and can be essential in the diagnosis of those causative factors, especially life-threatening ones such as infection or trauma. We present here a case of a patient who presented in posttraumatic cardiac arrest and an extensive, grossly obvious, and rapidly expanding pneumoscrotum. Based on our patient's clinical presentation and a history of a high-speed mechanism with obvious torso trauma, a diagnosis of tension pneumothorax was quickly made resulting in immediate treatment. We review the existing literature and highlight the importance of pneumoscrotum in aiding with differential diagnosis. The presence of pneumoscrotum is often benign; however, in the right clinical setting, it can be an extremely important and useful clinical tool for the early identification and timely treatment of life-threatening diagnoses, such as tension pneumothorax.

The Periosteal Medial Femoral Condyle Free Flap: A New Option for Soft Tissue Reconstruction of the Distal Lower Extremity

BACKGROUND

Small (<30 cm) soft tissue defects of the distal leg, foot, and ankle pose a complicated issue with regard to wound healing. Multiple flaps have been proposed for reconstruction of these wounds with varying levels of success. The medial femoral condyle flap is a free bone flap supplied by the descending geniculate artery. It is currently used in the treatment of fracture nonunion, infected bone defects, avascular necrosis, and osteoradionecrosis. This study proposes the use of the periosteal portion of the medial femoral condyle (PMFC) flap for soft tissue reconstruction of the distal leg, foot, and ankle.

METHODS

We performed a single-center, retrospective series of 6 patients with distal leg, foot, and ankle wounds. All patients underwent reconstruction using the PMFC flap.

RESULTS

Of the 6 patients, 5 had chronic wounds. There were no incidences of flap loss. Five patients healed without complication, four of which had undergone immediate skin grafting, whereas one had concomitant skin paddle reconstruction. The remaining patient required a second surgery with a rotation flap for recurrent osteomyelitis and wound infection 2 months after the initial surgery. Mean operative time decreased after a 2-case learning curve.

CONCLUSIONS

Small wounds of the distal extremity can be difficult to treat, with many requiring free or rotational flap coverage. We propose novel use of the PMFC flap for reconstruction of small soft tissue defects of the distal leg, foot, and ankle. In our series, we demonstrated no donor site morbidity, with excellent cosmetic and functional outcomes.

Investigation of meningomyovertebral structures within the upper cervical epidural space: a sheet plastination study with clinical implications

BACKGROUND CONTEXT

Over the past two decades, soft-tissue structures communicating with the dura mater within the epidural space have become the focus of many anatomical and histopathologic studies. The relationship between these bridging structures has yet to be evaluated in situ.

PURPOSE

This is the first study that used E12 sheet plastination to investigate the epidural space of the upper cervical spine in situ and its associated bridging structures. Given the complexity of this space, this study may prove useful to clinical anatomists and surgeons who operate within this region.

STUDY DESIGN

Anatomical and microscopic analyses of structures that communicate with the dura mater within the upper cervical region were carried out.

METHODS

Gross dissection in conjunction with microscopy was used to evaluate bridging communications of the upper cervical spine in 10 cadavers. To evaluate the in situ arrangement of these structures, E12 sheet plastination was used on 13 cadavers.

RESULTS

In all 23 specimens, suboccipital fascia coalesced with the dorsal meningovertebral ligament of the atlas, and inserted directly into the posterior surface of the dura as a single but separable laminar layer. At the level of the atlantoaxial interspace, suboccipital fasciae combined and coalesced with the dorsal meningovertebral ligament of the atlas and the axis. These structures inserted into the posterior surface of the dura mater as a single but separable layer. Microscopy validated these findings and E12 sheet plastination revealed the in situ organization of these soft-tissue structures. E12 sheet plastination also provided new information on dural arrangement at the craniocervical junction, which was observed to be composed of periosteum from the occiput but consisted mainly of deep fascia from the rectus capitis posterior minor.

CONCLUSIONS

E12 sheet plastination has provided in situ visualization of bridging structures within the cervical epidural space and offers new insight into these structures, as well as the composition and arrangement of the posterior atlantooccipital membrane and cerebrospinal dura at the craniocervical junction. This study aims to expand on the anatomical understanding of the upper cervical region while defining structures that may reduce neurosurgical complications, and aid in the understanding of the pathophysiology of certain neurogenic disorders.

Delayed presentation of a lumbar artery pseudoaneurysm resulting from isolated penetrating trauma

Lumbar artery pseudoaneurysms are infrequent complications of penetrating trauma. When present, they are often accompanied by other injuries; however, we report the case of an isolated traumatic lumbar artery aneurysm resulting from a single knife stab. The lesion was successfully treated with endovascular microcoil embolization. While these injuries are uncommon, the surgeon must maintain a high index of suspicion, even with seemingly uncomplicated injuries, as a missed traumatic pseudoaneurysm may be life threatening.

Defining the Morphology and Distribution of the Alar Fascia

Objectives:

This study aims to delineate the morphology, integrity, and distribution of the alar fascia using dissection and E12 sheet plastination. This is the first study that employs E12 sheet plastination to investigate the alar fascia and its adjacent potential spaces.

Methods:

Twenty-nine manual dissections and 3 sets of E12 sheet plastinations were used to examine the posterior pharyngeal region for the architecture and distribution of the alar fascia. Specimens were examined from the inferior nuchal line to C6.

Results:

The alar fascia originated as a well-defined midline structure at the level of C1 and could be identified down to C6. There was no evidence of the alar fascia between the inferior nuchal line and the base of the skull. Notably, the alar fascia permitted resistance to manual traction.

Conclusions:

E12 sheet plastination allowed for visualization of the alar fascia’s superior attachments within the deep cervical region. Resistance to traction suggests that the alar fascia may be more than just a loose fibroareolar matrix. The findings in this study suggest an alternative point of entry into the danger space. Understanding the continuity of this fascial layer is critically important with regard to the pathophysiology of deep neck space infections.

The cervical myodural bridge, a review of literature and clinical implications

The role of posterior cervical musculature in sensorimotor control, cervicocephalic pain, and stabilization of the spinal cord has been recently described. Anatomical soft tissue connections which cross the cervical epidural space link suboccipital muscle fascia and dura. These myodural bridges provide passive and active anchoring of the spinal cord. They may also be involved in a dural tension monitoring system to prevent dural infolding, and maintain patency of the spinal cord. Modulation of dural tension may be initiated via a sensory reflex to muscular contractile tissues. Unanticipated movements such as hyperflexion extension injuries stimulate deep suboccipital muscles and transmit tensile forces through the bridge to the cervical dura. Due to its larger cross sectional area, the rectus capitis posterior major myodural bridge may exert greater mechanical traction on the dura than the rectus capitis posterior minor. University ethics committee approval and anatomical donor consent was obtained for this study.

Histological analysis of the rectus capitis posterior major's myodural bridge

BACKGROUND CONTEXT

In recent literature, a soft-tissue communication between the rectus capitis posterior major (RCPma) muscle and the cervical dura mater has been identified. To the best of our knowledge, this communication has yet to be validated from a histological perspective nor has it been examined for neural tissue.

PURPOSE

The purpose of this study was to examine the composition and true continuity of the communication between the RCPma and the dura mater at a microscopic level. The communication was also inspected for the presence of proprioceptive neurons.

STUDY DESIGN

An anatomical and histological analysis of a novel structure in the atlantoaxial interspace.

METHODS

Gross dissection was performed on 11 cadavers to remove the RCPma, the soft-tissue communication, and a section of posterior cervical dura mater as one continuous unit. Paraffin embedding and sectioning followed by hematoxylin and eosin staining was conducted to validate the connection. Staining with antineurofilament protein fluorescent antibodies was performed to identify proprioceptive neural tissue on one specimen, and all findings were recorded via photographic documentation.

RESULTS

Histological investigation revealed a tendinous matrix inserting into both the RCPma and the posterior aspect of the cervical dura mater in all 11 specimens. In the one specimen examined for neural tissue, antineurofilament protein fluorescence revealed proprioceptive neurons within the communication. Immunoperoxidase staining demonstrated the insertion of these neurons into both the dura mater and the belly of the RCPma.

CONCLUSIONS

The existence of a true connection between the RCPma and the cervical dura mater provides new insight in understanding the complex anatomy of the atlantoaxial interspace. The presence of a neural component within this connection suggests that it may serve another function aside from simply anchoring this muscle to the dura mater. Such a connection may be involved in monitoring dural tension and may also play a role in certain cervicogenic pathologies. This study also supports previous reports that no true membrane joins the posterior arch of the atlas to the laminae of the axis and contradicts the conventional belief that the ligamentum flavum joins these two structures.