Improving Fat Transplantation Survival and Vascularization with Adenovirus E4+ Endothelial Cell-Assisted Lipotransfer.

Autologous fat transplantation is plagued by an unpredictable and often significant degree of graft loss. AdE4+ endothelial cells (ECs) are human endothelial cells that have been transduced with the E4ORF1 region of human adenovirus type 5, resulting in long-term preservation of EC proliferation and angiogenic capability without immortalization. We hypothesized that AdE4+ EC-enriched fat grafts would demonstrate improved volume retention secondary to enhanced angiogenesis. Three experimental groups were prepared by admixing 400 µL of patient lipoaspirate with 100 µL of AdE4+ EC suspensions (high AdE4+ EC concentration-enriched [5 × 106/mL], low AdE4+ EC concentration-enriched [1.25 × 106/mL], or PBS) and injected subcutaneously into the bilateral dorsa of nude mice. Fat transplants were explanted at 90 and 180 days for volumetric and histologic analyses. After both 90 and 180 days, AdE4+ EC-enriched fat grafts showed greater mean volume preservation compared to control grafts (p < 0.05). Regions of focal necrosis were only noticed in low AdE4+ EC concentration-enriched and control groups after 180 days. Histologic analysis demonstrated the presence of healthy adipocytes in all AdE4+ EC-enriched fat grafts in which both human and host ECs were evident after 90 and 180 days. AdE4+ EC enrichment improved fat graft volume preservation and vascularization in this murine xenograft model. Though further study is warranted, AdE4+ ECs demonstrated to be promising as a potential off-the-shelf adjunct for improving the volume, quality, and consistency of fat engraftment.

Essential inpatient otolaryngology: what COVID-19 has revealed.

PURPOSE: To identify areas of critical otolaryngology contributions to inpatient care resistant to disruption by the COVID-19 pandemic. METHODS: Medical records of 614 otolaryngology consults seen between January and June of 2019 and 602 seen between January and June of 2020 were reviewed. Extracted data included patient demographics, SARS-CoV-2 status, medical comorbidities, consult location, consult category, reason for consult, procedures performed, and overall outcome. Prevalence of data items was compared using t tests and Chi-squared tests. RESULTS: The number of monthly consults to the otolaryngology service remained approximately stable after the onset of the COVID-19 pandemic. However, there was a substantial increase in ICU consults and a decrease in ER and floor consults. The proportion of otology, rhinology, and head and neck consults decreased while that of airway consults-most of which were tracheostomy-related-greatly increased. While the top ten reasons for consult remained essentially the same, they dramatically increased as a percentage of consults during COVID-19 (55-92%), whereas there was a dramatic decrease in the proportion of less frequent consults. CONCLUSION: The changes in otolaryngology consultation patterns seen after the onset of the pandemic are multifactorial, but may be attributed to novel pathologies, attitudes, and policies. Nonetheless, these patterns reveal that a set of core otolaryngologic issues, including acute airway issues, head and neck lesions, severe sinusitis and epistaxis, are essential and need to be addressed in the inpatient setting, whereas the significant drop in other consults suggests that they may be appropriately managed on an outpatient basis.

Utilization of Facebook for support and education by patients with skin cancer.

The expanding role of social media in medical care has resulted in dermatology patients seeking support online regarding personal experience with diagnosis and treatment of skin cancer. Owing to increased privacy settings in closed Facebook groups, the current study analyzed themes of keratinocyte carcinoma patients' posts within a relatively private social media network. Although the majority of messages included sharing personal experience and provided psychosocial support (50%), there were a significant number of posts offering medical advice (35%), with the majority of such replies being unsupported by evidence-based medicine (87%). The level of medical misinformation and potential harm to patients seeking advice online is important for medical practitioners treating skin cancer and provides impetus for possible further research into online support and education groups that are moderated for misinformation.

3D-printed poly-4-hydroxybutyrate bioabsorbable scaffolds for nipple reconstruction.

Nearly all autologous tissue techniques and engineered tissue substitutes utilized for nipple reconstruction are hindered by scar contracture and loss of projection of the reconstructed nipple. The use of unprocessed costal cartilage (CC) as an internal support for the reconstructed nipple has not been widely adopted because of the excessively firm resultant construct. Herein we use a 3D-printed Poly-4-Hydroxybutyrate (P4HB) bioabsorbable scaffold filled with mechanically processed patient-derived CC to foster ingrowth of tissue in vivo to protect the regenerated tissue from contractile forces as it matures. After 6 months in vivo, newly formed spongy fibrovascular cartilaginous tissue was noted in processed CC filled 3D-printed scaffolds, which maintained significantly greater projection than reconstructions without scaffolds. Interestingly, 3D-printed P4HB scaffolds designed with an internal 3D lattice of P4HB filaments (without CC) displayed the fastest material absorption and vascularized adipose-fibrous tissue as demonstrated by SEM and histological analysis, respectively. Using 3D-printed P4HB scaffolds filled with either processed CC, a 3D P4HB lattice or no fills, we have engineered neo-nipples that maintain projection over time, while approximating the biomechanical properties of the native human nipple. We believe that this innovative 3D-printed P4HB nipple reconstruction scaffold will be readily translatable to the clinic. STATEMENT OF SIGNIFICANCE: Nearly all autologous tissue techniques and engineered tissue substitutes utilized for nipple reconstruction are hindered by scar contracture and substantial loss of projection of the reconstructed nipple, leading to significant patient dissatisfaction. Using 3D-printed P4HB scaffolds filled with either processed costal cartilage or 3D P4HB lattices, we have engineered neo-nipples that resist the forces induced by scar contracture, resulting in maintenance of neo-nipple projection over time and biomechanically approximating human nipples after 6 months in vivo implantation. This novel 3D-printed bioabsorbable P4HB scaffold will be readily translatable to the clinic to reconstruct nipples with patient-specific dimensions and long-lasting projection.

Ex vivo confocal microscopy: a diagnostic tool for skin malignancies.

Confocal microscopy is an imaging tool that uses a laser system to image the skin noninvasively with cellular resolution. With both in vivo and ex vivo systems, tissue can be imaged rapidly without damaging the sample. Herein, we discuss the capabilities of the ex vivo confocal microscope and its implementation for treatment and management of cutaneous malignancies.