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school:SOM

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Direct inkjet writing of polylactic acid/β-tricalcium phosphate composites for bone tissue regeneration: A proof-of-concept study

Nayak, Vasudev Vivekanand; Sanjairaj, Vijayavenkataraman; Behera, Rakesh Kumar; Smay, James E; Gupta, Nikhil; Coelho, Paulo G; Witek, Lukasz
There is an ever-evolving need of customized, anatomic-specific grafting materials for bone regeneration. More specifically, biocompatible and osteoconductive materials, that may be configured dynamically to fit and fill defects, through the application of an external stimulus. The objective of this study was to establish a basis for the development of direct inkjet writing (DIW)-based shape memory polymer-ceramic composites for bone tissue regeneration applications and to establish material behavior under thermomechanical loading. Polymer-ceramic (polylactic acid [PLA]/β-tricalcium phosphate [β-TCP]) colloidal gels were prepared of different w/w ratios (90/10, 80/20, 70/30, 60/40, and 50/50) through polymer dissolution in acetone (15% w/v). Cytocompatibility was analyzed through Presto Blue assays. Rheological properties of the colloidal gels were measured to determine shear-thinning capabilities. Gels were then extruded through a custom-built DIW printer. Space filling constructs of the gels were printed and subjected to thermomechanical characterization to measure shape fixity (Rf) and shape recovery (Rr) ratios through five successive shape memory cycles. The polymer-ceramic composite gels exhibited shear-thinning capabilities for extrusion through a nozzle for DIW. A significant increase in cellular viability was observed with the addition of β-TCP particles within the polymer matrix relative to pure PLA. Shape memory effect in the printed constructs was repeatable up to 4 cycles followed by permanent deformation. While further research on scaffold macro-/micro-geometries, and engineered porosities are warranted, this proof-of-concept study suggested suitability of this polymer-ceramic material and the DIW 3D printing workflow for the production of customized, patient specific constructs for bone tissue engineering.
PMID: 38520704
ISSN: 1552-4981
CID: 5641092

Commentary on: Complication Profiles of Smooth vs Textured Tissue Expanders in Breast Reconstruction: A Systematic Review and Meta-Analysis [Comment]

Karp, Nolan S
PMID: 38085072
ISSN: 1527-330x
CID: 5589162

Reduced mouth opening in patients with head and neck cancer treated with radiation therapy: An analysis of the Clinical Registry of Dental Outcomes in Head and Neck Cancer Patients (OraRad)

Sollecito, Thomas P; Helgeson, Erika S; Lalla, Rajesh V; Treister, Nathaniel S; Schmidt, Brian L; Patton, Lauren L; Lin, Alexander; Brennan, Michael T
OBJECTIVE:Trismus/reduced mouth opening (RMO) is a common side effect of radiotherapy (RT) for head and neck cancer (HNC). The objective was to measure RMO, identify risk factors for RMO, and determine its impact on quality of life (QOL). STUDY DESIGN/METHODS:OraRad is an observational, prospective, multicenter cohort study of patients receiving curative intent RT for HNC. Interincisal mouth opening measurements (n = 565) and patient-reported outcomes were recorded before RT and every 6 months for 2 years. Linear mixed-effects models were used to evaluate change in mouth opening and assess the relationship between trismus history and change in QOL measures. RESULTS:Interincisal distance decreased from a mean (SE) of 45.1 (0.42) mm at baseline to 42.2 (0.44) at 6 months, with slight recovery at 18 months (43.3, 0.46 mm) but no additional improvement by 24 months. The odds of trismus (opening <35 mm) were significantly higher at 6 months (odds ratio [OR] = 2.21, 95% CI: 1.30 to 3.76) and 12 months (OR = 1.87, 95% CI: 1.08 to 3.25) compared with baseline. Females were more likely to experience trismus at baseline and during follow-up (P < .01). Patients with oral cavity cancer had the highest risk for trismus at baseline and post-RT (P < .01). RMO was associated with higher RT dose to the primary site and receiving concomitant chemotherapy (P < .01). Trismus was associated with self-reported difficulty opening the mouth and dry mouth (P < .01). CONCLUSIONS:A decrease in mouth opening is a common treatment-related toxicity after RT, with some recovery by 18 months. Trismus has a significant impact on survivor QOL.
PMID: 38262773
ISSN: 2212-4411
CID: 5625602

Pronator syndrome and anterior interosseous nerve palsy due to neurolymphomatosis: a case report

Leung, Sophie L; Daniels, Steven P; Hacquebord, Jacques H; Ward, Nicholas; Adler, Ronald S
Pronator syndrome is a median nerve entrapment neuropathy that can be difficult to diagnose due to its variable presentation and objective findings. Neurolymphomatosis is an uncommon disease in which malignant lymphocytes infiltrate central or peripheral nerve endoneurium and is often missed for prolonged periods prior to diagnosis. We present a rare case of pronator syndrome and anterior interosseous nerve palsy due to neurolymphomatosis that was occult on initial MRI in spite of the presence of a median nerve mass discovered intra-operatively during neurolysis. This case demonstrates the value of ultrasound for the examination of peripheral nerve pathology and illustrates its utility as an adjunct to MRI, in part due to the ability to screen a large region.
PMID: 37566147
ISSN: 1432-2161
CID: 5619112

Postoperative Magnesium Sulfate Repletion Decreases Narcotic Use in Abdominal-Based Free Flap Breast Reconstruction

Lu, Yi-Hsueh; Jeon, Jini; Mahajan, Lakshmi; Yan, Yufan; Weichman, Katie E; Ricci, Joseph A
BACKGROUND:Microsurgical breast reconstruction after mastectomy is now the standard of care for breast cancer patients. However, the costs and resources involved in free flap reconstruction can vary across different medical settings. To enhance patient outcomes in a cost-effective manner, we investigated the effect of intravenous magnesium sulfate (IV Mg) on postoperative opioid usage in this context. METHODS:A retrospective chart review was performed on all consecutive patients who underwent abdominal-based free flap breast reconstruction in a single institute following an enhanced recovery after surgery (ERAS) protocol. Patients who received IV Mg were compared with those who did not receive supplementation. Serum magnesium levels at different time points, narcotic consumption in units of oral morphine milligram equivalents (MMEs), and other postoperative recovery parameters were compared. RESULTS:82 patients were included. Those who received IV Mg on postoperative day 0 (n=67) showed significantly lower serum magnesium levels before repletion (1.5 mg/dL vs. 1.7 mg/dL, p=0.004) and significantly higher levels on postoperative day 1 after repletion (2.2 mg/dL vs. 1.7 mg/dL, p=0.0002) compared to patients who received no magnesium repletion (n=13). While both groups required a similar amount of narcotics on postoperative day 0 (20.2 MMEs vs. 13.2 MMEs, p=0.2), those who received IV Mg needed significantly fewer narcotics for pain control on postoperative day 1 (12.2 MMEs for IV Mg vs. 19.8 MMEs for No Mg, p=0.03). Recovery parameters, including maximal pain scores, postoperative mobilization, and length of hospital stay, did not significantly differ between the two groups. CONCLUSION This is the first study to describe the potential analgesic benefits of routine postoperative magnesium repletion in abdominal-based free flap reconstruction, although further research is necessary to fully understand the role of perioperative magnesium supplementation as part of an ERAS protocol.
PMID: 38272058
ISSN: 1098-8947
CID: 5625262

Transpalpebral/Blepharoplasty Incision and Supraorbital Craniotomy for the Treatment of Ethmoidal Dural Arteriovenous Fistulas: A Case Series

Hagstrom, Rory; Nossek, Erez; Rutledge, Caleb W; Ponchione, Elizabeth; Suryadevara, Carter; Kremer, Caroline; Alcon, Andre; Sharashidze, Vera; Shapiro, Maksim; Raz, Eytan; Nelson, Peter K; Staffenberg, David A; Riina, Howard A
BACKGROUND AND OBJECTIVES/OBJECTIVE:Inherent complex angioarchitecture associated with ethmoidal dural arteriovenous fistulas (dAVFs) can make endovascular treatment methods challenging. Many surgical approaches are accompanied by unfavorable cosmetic results such as facial scarring. Blepharoplasty incision of the eyelid offers a minimal, well-hidden scar compared with other incision sites while offering the surgeon optimal visualization of pathogenic structures. This case series aims to report an initial assessment of the safety and efficacy of supraorbital craniotomy by blepharoplasty transpalpebral (eyelid) incision for surgical disconnection of ethmoidal dAVFs. METHODS:Retrospective chart review was conducted for all patients who underwent blepharoplasty incision and craniotomy for disconnection of ethmoidal dAVFs at our institution between October 2011 and February 2023. Patient charts and follow-up imaging were reviewed to report clinical and angiographic outcomes as well as periprocedural and follow-up complications. RESULTS:Complete obliteration and disconnection of ethmoidal dAVF was achieved in all 6 (100%) patients as confirmed by intraoperative angiogram with no resulting morbidity or mortality. Periprocedural complications included one case of transient nasal cerebrospinal fluid leak that was self-limiting and resolved before discharge without intervention. CONCLUSION/CONCLUSIONS:Surgical treatment for ethmoidal dAVFs, specifically by transpalpebral incision and supraorbital craniotomy, is a safe and effective treatment option and affords the surgeon greater access to the floor of the anterior fossa when necessary. In addition, blepharoplasty incision addressed patient concerns for facial scarring compared with other incision sites by creating a more well-hidden, minimal scar in the natural folds of the eyelid for patients with an eyelid crease.
PMID: 38376155
ISSN: 2332-4260
CID: 5634152

Incidence, complications, and long-term outcomes of gender-affirming phalloplasty: analysis of a large statewide population-based dataset

Zhang, Tenny R; Harel, Daphna; Rivera, Adrian; Shahnawaz, Samia; Qian, Yingzhi; Berry, Carolyn; Zhao, Lee C; Radix, Asa; Bluebond-Langner, Rachel; Mmonu, Nnenaya A
OBJECTIVE:To evaluate the incidence of gender-affirming phalloplasty and complications in a large population-based dataset. METHODS:Retrospective cohort study was done using the California Department of Health Care Access and Information datasets which include patient-level data from all licensed hospitals, emergency departments, and ambulatory surgery facilities in California. Adult patients 18 years or older undergoing gender-affirming phalloplasty in California from January 1, 2009 to December 31, 2019 were included. We examined phalloplasty-related complications using International Classification of Disease diagnosis and procedure codes and Current Procedural Terminology codes. Unique record linkage number identifiers were used to follow patients longitudinally. Statistical analysis included Kaplan-Meier survival analysis and Cox proportional hazards analysis. RESULTS:We identified 766 patients who underwent gender-affirming phalloplasty in 23 facilities. Of 475 patients with record linkage numbers, 253 (55.3%) had subsequent re-presentations to the inpatient, emergency department, and ambulatory surgery settings related to phalloplasty complications. Survival analysis indicated that 50% of patients re-presented by 1 year post-phalloplasty. Asian/Pacific Islander patients had lower risk of complications, and California residents had higher risk of complications. CONCLUSIONS:This population-based study confirms that gender-affirming phalloplasty has a high complication rate, and demonstrates for the first time an association with high rates of return to hospitals, emergency departments, and ambulatory centers. These findings provide additional higher-level evidence that may aid patient counseling, shared surgical decision making, and institutional and government policy.
PMID: 38340965
ISSN: 1527-9995
CID: 5635512

Autoimmune, Autoinflammatory Disease and Cutaneous Malignancy Associations with Hidradenitis Suppurativa: A Cross-Sectional Study

Brydges, Hilliard T; Onuh, Ogechukwu C; Friedman, Rebecca; Barrett, Joy; Betensky, Rebecca A; Lu, Catherine P; Caplan, Avrom S; Alavi, Afsaneh; Chiu, Ernest S
BACKGROUND:Hidradenitis suppurativa (HS) is a debilitating cutaneous disease characterized by severe painful inflammatory nodules/abscesses. At present, data regarding the epidemiology and pathophysiology of this disease are limited. OBJECTIVE:To define the prevalence and comorbidity associations of HS. METHODS:examining over 180 million US patients. Prevalences were calculated by demographic and odds ratios (OR) and identified comorbidity correlations. RESULTS:All examined metabolism-related, psychological, and autoimmune/autoinflammatory (AI) diseases correlated with HS. The strongest associations were with pyoderma gangrenosum [OR 26.56; confidence interval (CI): 24.98-28.23], Down syndrome (OR 11.31; CI 10.93-11.70), and polycystic ovarian syndrome (OR 11.24; CI 11.09-11.38). Novel AI associations were found between HS and lupus (OR 6.60; CI 6.26-6.94) and multiple sclerosis (MS; OR 2.38; CI 2.29-2.48). Cutaneous malignancies were largely not associated in the unsegmented cohort; however, among Black patients, novel associations with melanoma (OR 2.39; CI 1.86-3.08) and basal cell carcinoma (OR 2.69; CI 2.15-3.36) were identified. LIMITATIONS/CONCLUSIONS:International Classification of Diseases (ICD)-based disease identification relies on coding fidelity and diagnostic accuracy. CONCLUSION/CONCLUSIONS:This is the first study to identify correlations between HS with melanoma and basal cell carcinoma (BCC) among Black patients as well as MS and lupus in all patients with HS.
PMID: 38337127
ISSN: 1179-1888
CID: 5632132

AUTHOR REPLY TO COMMENTARY ON "INCIDENCE AND LONG-TERM OUTCOMES OF GENDER-AFFIRMING PHALLOPLASTY: ANALYSIS OF A LARGE STATEWIDE POPULATION-BASED DATASET" [Letter]

Zhang, Tenny R; Harel, Daphna; Rivera, Adrian; Shahnawaz, Samia; Qian, Yingzhi; Berry, Carolyn; Zhao, Lee C; Radix, Asa; Bluebond-Langner, Rachel; Mmonu, Nnenaya A
PMID: 38336134
ISSN: 1527-9995
CID: 5632062

Differential preferences in breast aesthetics by self-identified demographics assessed on a national survey

Boyd, Carter J; Bekisz, Jonathan M; Hemal, Kshipra; Sorenson, Thomas J; Karp, Nolan S
There is a paucity of literature examining how preferences differ amongst various demographic groups. This study aimed to assess how perceptions of the ideal breast differ between respondents stratified by self-identified demographic factors. A cohort of 25 patients from the senior surgeon's practice presenting for breast surgery was assembled. Pre-operative anteroposterior photographs of these patients were distributed via Qualtrics (Seattle, WA) to a large sample designed to be representative of the demographics of the United States. Survey questions aimed to measure respondents' impressions of 'breast attractiveness'. Respondents were asked to rate breasts on a Likert scale. Survey responses were analysed for differences in breast aesthetic preferences by sex, gender, sexual orientation, and race. Males rated all breasts higher on the Likert scale for attractiveness than females (2.8 vs 2.5, p < 0.001). Despite this discrepancy, ratings amongst male and female respondents were highly correlated with one another (R = 0.940; p < 0.0001). Considering sexual orientation, individuals attracted to women provided significantly higher attractiveness ratings to all breasts compared to individuals attracted to men only (2.8 vs 2.5, p < 0.001). White or Caucasian individuals ascribed significantly higher breast attractiveness ratings than Asian individuals (2.7 vs 2.2, p < 0.001), but not Black or African American individuals (2.7 vs 2.4, p = 0.23). Despite these racial discrepancies in mean breast attractiveness, ratings amongst the three groups were highly correlated. In a sample representative of the United States, a difference in breast aesthetic appraisal was observed by demographic factors. These findings merit further investigation to understand these trends and observations.
PMID: 38364668
ISSN: 1878-0539
CID: 5636042