Machine‐learning‐based approach for predicting postoperative skeletal changes for orthognathic surgical planning

xlomafota13 shared this article with you from Inoreader Machine‐learning‐based approach for predicting postoperative skeletal changes for orthognathic surgical planning Via The International Journal of Medical Robotics and Computer Assisted Surgery Abstract Background Manually surgical planning becomes an increasing workload of surgeons because of the fast-growing patient population. This study introduced a machine-learning-based approach to assist surgical planning in orthognathic surgery. Methods Both preoperative and one-year-later postoperative CT images of 56 patients were collected. A 12-layers cascaded deep neural network structure with two successive models was proposed to yield an end-to-end solution, where the first model extracts landmarks from 2D patches of 3D volume and the second model predicts postoperative skeletal changes. Results The experimental results showed that the model obtained a prediction accuracy of 5.4 mm at the landmark level in 42.9 s. It also represented 74.4% of 3D regions at volume level when compared with the ground truth of human surgeons. Conclusions This study demonstrated the feasibility of predicting postoperative skeletal changes for orthognathic surgical planning by using machine learning, showing great potential for reducing the workload of surgeons. This article is protected by copyright. All rights reserved. View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Functional imaging in thyroid cancer patients with metastases and therapeutic implications

xlomafota13 shared this article with you from Inoreader Functional imaging in thyroid cancer patients with metastases and therapeutic implications Via radioactive iodine Presse Med. 2022 Feb 4:104113. doi: 10.1016/j.lpm.2022.104113. Online ahead of print. ABSTRACT Functional imaging plays a central role in the management of thyroid cancer patients. In patients with a differentiated thyroid cancer (DTC), radioactive iodine (RAI) is used mostly with a therapeutic intent, either post-operatively or as the first line systemic treatment in patients with known structural disease. A whole body scan is performed a few days after the RAI administration, and this procedure is very sensitive to detect all tumor foci with RAI uptake. PET/CT with 18F-FDG complements the use of RAI at the initial evaluation of patients with high-risk DTC, during follow-up in those with rising serum thyroglobulin levels over time, for the work-up of patients with documented structural disease and for assessing the efficacy of focal or systemic treatment modalities. 18F-FDG uptake is a prognostic indicator in all these clinical conditions. A dosimetric approach with 124I PET/CT showed encouraging results. Several functional imaging modalities are currently available for medullary thyroid carcinoma (MTC) patients. 18F-FDG-PET/CT may be sensitive in MTC patients with high FDG uptake that signals aggressive disease. 18F-DOPA is the most sensitive imaging technique to visualize small tumor foci, and is also highly specific in patients with a known MTC, but should be complemented by a CT scan of the chest and by a MRI of the liver to detect small metastases. PMID:35131318 | DOI:10.1016/j.lpm.2022.104113 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Convulsive Syncope From Carotid Sinus Syndrome as a Manifestation of Laryngeal Cancer

xlomafota13 shared this article with you from Inoreader Convulsive Syncope From Carotid Sinus Syndrome as a Manifestation of Laryngeal Cancer Via otol rhinol Ann Otol Rhinol Laryngol. 2022 Feb 7:34894221076573. doi: 10.1177/00034894221076573. Online ahead of print. ABSTRACT OBJECTIVE: Carotid sinus syndrome (CSS) is a rare yet serious presentation of head and neck malignancy. To our knowledge, syncope and seizure-like episodes as a manifestation of carotid sinus syndrome secondary to laryngeal cancer has not been reported to date. We report a case of laryngeal cancer causing convulsive syncope masquerading as seizures due to CSS. METHODS: Case report. The patient's medical record was reviewed for demographic and clinical information. RESULTS: A 62-year-old male presented with multiple episodes of syncope and hoarseness of voice. On nasoendoscopic examination, left vocal cord palsy and left aryepiglottic fold tumor were visualized. Computerized tomography (CT) neck showed a large 2.4 × 3.6 cm left supraglottic tumor with local invasion and extensive cervical lymphadenopathy compressing the carotid sinus. CT guided biopsy of the tumor revealed invasive squamous cell carcinoma. While undergoing evaluation, the patient developed seizure-like episodes. Inpatient telemetry monitoring revealed significant bradycardia and hypotension during these episodes. A permanent pacemaker was inserted which resulted in resolution of the syncopal and seizure-like episodes. CONCLUSION: In patients with unexplained syncope or seizure-like episodes and a background of head and neck cancer, clinicians should con sider the diagnosis of CSS. CSS is a poor prognostic factor due to the associated higher stage of disease. PMID:35130751 | DOI:10.1177/00034894221076573 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Racial disparities in short-term outcomes after breast reduction surgery-A National Surgical Quality Improvement Project Analysis with 23,268 patients using Propensity Score Matching

xlomafota13 shared this article with you from Inoreader Racial disparities in short-term outcomes after breast reduction surgery-A National Surgical Quality Improvement Project Analysis with 23,268 patients using Propensity Score Matching Via Journal of plastic, reconstructive & aesthetic surgery : JPRAS J Plast Reconstr Aesthet Surg. 2022 Jan 16:S1748-6815(22)00014-6. doi: 10.1016/j.bjps.2022.01.001. Online ahead of print. ABSTRACT BACKGROUND: Evidence of widespread disparities in healthcare for racial and ethnic minorities is well documented. This study aims to evaluate differences in surgical outcomes after breast reduction surgery (BRS) according to patients' ethnicities. METHODS: The American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) database (2005-2018) was utilized to analyze two propensity score matched patient cohorts-White and non-White-that underwent BRS. Preoperative variables assessed included demographic data and comorbidities such as diabetes mellitus, hypertension, and obesity. Postoperative outcomes assessed were medical complications, minor and major surgical complications, as well as mortality. RESULTS: In total, 23268 patients underwent BRS and met the inclusion criter ia. After propensity score matching, the two cohorts were matched with respect to these preoperative variables, and 7187 patients were included in each cohort of White and non-White patients (total 14374). After matching, overall 30-day major complications were not significantly different between White and non-White cohort (2.25% vs 2.14%, p=0.65). After accounting for differences in confounding variables at the patient and socioeconomic level, racial and ethnic minorities who underwent breast reduction were found to experience fewer minor surgical complications. The analysis of temporal trends identified an overall rise in the number of patients seeking BRS, with a higher increase noted in the non-White population. CONCLUSION: Overall, our findings are reassuring exemptions to prevalent racial and ethnic health inequalities and can serve as a positive example for adequate and fair provision of surgical care. PMID:35131191 | DOI:10.1016/j.bjps.2022.01.001 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Quantification of near-infrared fluorescence imaging with indocyanine green in free flap breast reconstruction

xlomafota13 shared this article with you from Inoreader Quantification of near-infrared fluorescence imaging with indocyanine green in free flap breast reconstruction Via Journal of plastic, reconstructive & aesthetic surgery : JPRAS J Plast Reconstr Aesthet Surg. 2022 Jan 14:S1748-6815(22)00003-1. doi: 10.1016/j.bjps.2021.12.004. Online ahead of print. ABSTRACT BACKGROUND: One of the complications of free flap breast reconstruction is the occurrence of skin and fat necrosis. Intra-operative use of near-infrared (NIR) fluorescence imaging with Indocyanine Green (ICG) has the potential to predict these complications. In this study, the quantification of the fluorescence intensity measured in free flap breast reconstruction was performed to gain insight into the perfusion patterns observed with ICG NIR fluorescence imaging. METHODS: ICG NIR fluorescence imaging was performed in patients undergoing free flap breast reconstruction following mastectomy. After completion of the arterial and venous anastomosis, 7.5 mg ICG was administered intravenously. The fluorescence intensity over time was recorded using the Quest Spectrum Platform®. Four regions of interest (R OI) were selected based on location and interpretation of the NIR fluorescence signal: (1) The perforator, (2) normal perfusion, (3) questionable perfusion, and (4) low perfusion. Time-intensity curves were analyzed, and two parameters were extracted: Tmax and Tmax slopes. RESULTS: Successful ICG NIR fluorescence imaging was performed in 13 patients undergoing 17 free flap procedures. Region selection included 16 perforators, 17 normal perfusions, 8 questionable perfusions, and 5 low perfusion ROIs. Time-intensity curves of the perforator ROIs were comparable to the ROIs of normal perfusion and demonstrated a fast inflow. No outflow was observed for the ROIs with questionable and low perfusion. CONCLUSION: This study provides insight into the perfusion patterns observed with ICG NIR fluorescence imaging in free flap breast reconstruction. Future studies should correlate quantitative parameters with clinical perfusion assessment and outcome. PMID:35131194 | DOI:10.1016/j.bjps.2021.12.004 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Predicting outcomes from sentinel node biopsy for melanoma in the UK: Is the MIA nomogram the answer?

xlomafota13 shared this article with you from Inoreader Predicting outcomes from sentinel node biopsy for melanoma in the UK: Is the MIA nomogram the answer? Via Journal of plastic, reconstructive & aesthetic surgery : JPRAS J Plast Reconstr Aesthet Surg. 2022 Jan 21:S1748-6815(22)00031-6. doi: 10.1016/j.bjps.2022.01.017. Online ahead of print. NO ABSTRACT PMID:35131192 | DOI:10.1016/j.bjps.2022.01.017 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Preliminary study of virtual touch tissue imaging quantification in diffuse testicular diseases of male infertility

xlomafota13 shared this article with you from Inoreader Preliminary study of virtual touch tissue imaging quantification in diffuse testicular diseases of male infertility Via histochem Acta Histochem. 2022 Feb 4;124(2):151860. doi: 10.1016/j.acthis.2022.151860. Online ahead of print. ABSTRACT Objective To explore the preliminary application method and diagnostic value of virtual touch tissue imaging quantification (VTIQ) in diffuse testicular diseases of male infertility. A total of 70 male examiners in our hospital from June 2019 to March 2020 were selected as the research objects. According to whether the subjects are sick (testicular microlithiasis, vari cocele), all subjects are divided into three groups: normal group, testicular microlithiasis group, and varicocele group. Whether there is a difference between the groups, and analyze whether there is a correlation between the index reflecting the quality of the semen and the testicular shear wave velocity. The measurement of different positions in the testis will affect the magnitude of the shear wave velocity (P < 0.05). The shear wave velocities of the testes of different diseases are obviously different from the normal side. At the same time, postural changes will have a certain impact on the shear wave velocities of both testes (all P < 0.05). There is a certain correlation between the testicular shear wave velocity and the conventional semen quality index (total sperm motility (P < 0.05)) of the subjects. Acoustic palpation tissue imaging quantitative technology can be applied to the diagnosis of male testes and testicular-related diseases (especially diffuse testicul ar diseases), and is more suitable for male infertility, which can provide clinical diagnosis and treatment options certain imaging basis. PMID:35131591 | DOI:10.1016/j.acthis.2022.151860 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Depleting hsa_circ_0000567 suppresses acquired gefitinib resistance and proliferation of lung adenocarcinoma cells through regulating the miR-377-3p / ZFX axis: an in vitro and in vivo study

xlomafota13 shared this article with you from Inoreader Depleting hsa_circ_0000567 suppresses acquired gefitinib resistance and proliferation of lung adenocarcinoma cells through regulating the miR-377-3p / ZFX axis: an in vitro and in vivo study Via Cellular and Molecular Biology Histol Histopathol. 2022 Feb 8:18431. doi: 10.14670/HH-18-431. Online ahead of print. ABSTRACT BACKGROUND: Circular RNAs (circRNAs) expression profile has been reported in lung adenocarcinoma (LUAD) cells resistant to gefitinib, and hsa_circ_0000567 was abnormally upregulated. However, its precise role in gefitinib resistance remains unclarified. METHODS: Levels of hsa_circ_0000567, microRNA (miR)-377-3p and zinc finger protein X-linked (ZFX) were detected by real-time quantitative PCR. Direct attachment was confirmed by dual-luciferase reporter assay and RNA immunoprecipitation assay. Gefitinib resistance was measured by MTT assay, colony formation assay, flow cytometry, western blotting, and xenograft in mice. RESULTS: Expression of hsa_circ_0000567 was upreguated in human gefitinib-resistant human LUAD tissues and cells (HCC827/GR and PC9/GR). Clinically, higher hsa_circ_0000567 correlated with advanced tumor burden. Blo ckage of hsa_circ_0000567 suppressed cell viability, half maximal inhibitory concentration (IC₅₀) value, colony formation ability, and expression of Bcl-2 and proliferating cell nuclear antigen (PCNA) in HCC827/GR and PC9/GR cells under gefitinib treatment or not, accompanied with enhanced apoptosis rate and Bax expression. In vivo, tumor growth of PC9/GR cells untreated and treated with gefitinib was restrained by silencing hsa_circ_0000567. miR-377-3p was directly regulated by hsa_circ_0000567, and then targeted ZFX. Similar to hsa_circ_0000567 knockdown, overexpressing miR-377-3p inhibited chemoresistance in genitinib-resistant LUAD cells in vitro, whereas, depleting miR-377-3p was able to promote gefitinib resistance in spite of hsa_circ_0000567 knockdown. Moreover, restoring ZFX abrogated miR-377-3p-mediated chemosensitivity in genitinib-resistant LUAD cells in vitro. CONCLUSION: The hsa_circ_0000567/miR-377-3p/ZFX axis might contribute to acquired gefitinib resistanc e in LUAD cells both in vitro and in vivo, suggesting hsa_circ_0000567 as a novel therapeutic target in treatment of gefitinib-resistant LUAD. PMID:35133000 | DOI:10.14670/HH-18-431 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Harmine reinforces the effects of regorafenib on suppressing cell proliferation and inducing apoptosis in liver cancer cells

xlomafota13 shared this article with you from Inoreader Harmine reinforces the effects of regorafenib on suppressing cell proliferation and inducing apoptosis in liver cancer cells Via Experimental and therapeutic medicine Exp Ther Med. 2022 Mar;23(3):209. doi: 10.3892/etm.2022.11132. Epub 2022 Jan 7. ABSTRACT The overall outcomes for patients with advanced liver cancer are far from satisfactory, and the development of more effective therapeutic strategies for liver cancer is required. Sulforhodamine blue and colony formation assays were performed to detect the proliferation of liver certain cancer cells, including HepG2 and Hep3B. Western blotting was also preformed to detect the expression of indicated proteins, including cleaved-caspase-3, cleaved-poly (ADP-ribose) polymerase, dual-specificity tyrosine phosphorylation kinase 1A (DYRK1A), PARP-1/2, GAPDH, myeloid cell leukemia-1, phosphorylated-AKT (Ser473), caspase-3, α-tubulin and AKT. PI staining was used to detect cell death. In the present study, DYRK1A knockdown significantly enhanced the anti-liver cancer effect of regorafenib in vitro. Furthermore, DYRK1A inhibitor harmine together with regorafenib provided synergistic anti-liver cancer activity by suppressing cell proliferation. In addition, harmine significantly enhanced regorafenib-induced cell death in liver cancer cells. It has been reported that AKT signaling is activated in regorafenib-resistant cancer cells and plays a crucial role in the regulation of cellular sensitivity to regorafenib. In the present study, AKT was activated in regorafenib-treated cells, and harmine could suppress the activation of AKT and reinforce the anti-cancer effects of regorafenib via regulating AKT in liver cancer cells. These data indicated that harmine enhanced the anti-cancer effects of regorafenib on suppressing cell proliferation and inducing apoptosis in liver cancer cells via regulating the activation of AKT, and harmine plus regorafenib may be a potential therapeutic regimen for treating patients with liver cancer. PMID:35126712 | PMC:PMC8796640 | DOI:10.3892/etm.2022.11132 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Minimally invasive treatment and internal fixation vs. extended lateral approach in calcaneus fractures of thalamic interest

xlomafota13 shared this article with you from Inoreader Minimally invasive treatment and internal fixation vs. extended lateral approach in calcaneus fractures of thalamic interest Via Experimental and therapeutic medicine Exp Ther Med. 2022 Mar;23(3):196. doi: 10.3892/etm.2022.11119. Epub 2022 Jan 5. ABSTRACT The extended lateral side approach is a common technique in the surgical treatment of calcaneal fractures, with thalamic collapse offering a good exposure of the fractured site; however, it can be burdened with complications due to soft tissue trauma. The present study aimed to compare patients treated with minimally invasive osteosynthesis through a minimum lateral approach and internal fixation with patients that were treated using internal fixation with an extended lateral side approach in cases of intra-articular calcaneal fractures with thalamic fracture. Patients were evaluated preoperatively and postoperatively by performing clinical and imagistic examinations, with radiography scans of the anterior-posterior calcaneal profile and computer tomography. Furthermore, preoperative and postoperative analyses of the Böhler angle on the radiologic al profile, complications and duration of the hospital admission for both groups were performed. There were 36 patients (39 calcaneal fractures) in group 1 and 24 patients (29 calcaneal fractures) in group 2. The results demonstrated no statistically significant differences in the preoperative (P=0.72) and postoperative (P=0.20) Böhler angle values. The postoperative Böhler angle average values were 26.9 in group 1 and 29.3 in group 2. A total of 11 patients were treated with Kirschner wires inserted in the calcaneus, and in 2/ll cases, one of the brooches registered a migration movement. There were no cases of material migration in the fractures that were stabilized by inserting Kirschner brooches up to the astragalus and cuboid bones. Taken together, the results of the present study demonstrated no significant differences in the Böhler angle values between the minimally invasive and open reduction techniques. However, the antibiotic therapy period, as well as the infection rate were lower in patients that were treated using the minimally invasive technique, suggesting that this technique was superior with respect to lower complication rates and improved functional results. PMID:35126699 | PMC:PMC8794544 | DOI:10.3892/etm.2022.11119 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

An original method of simulating the articular cartilage in the context of in vitro biomechanical studies investigating the proximal femur

xlomafota13 shared this article with you from Inoreader An original method of simulating the articular cartilage in the context of <em>in vitro</em> biomechanical studies investigating the proximal femur Via Experimental and therapeutic medicine Exp Ther Med. 2022 Mar;23(3):202. doi: 10.3892/etm.2022.11125. Epub 2022 Jan 5. ABSTRACT Biomechanical testing is a necessity given the development of novel implants used in the osteosynthesis of hip fractures. The purpose of biomechanical testing is to recreate realistic conditions similar to the in vivo conditions. Although biomechanical testing of hip arthroplasty has been standardized since the 1970s, there is no consensus at present on testing methodology for osteosynthesis of hip fractures. Most biomechanical studies examining the fractures of the proximal femur in order to optimize implants opt for loading the bone-implant ensemble directly on the femoral head or using a metallic loading part. This loading technique fails to perform a mechanical stress distribution similar to in vivo conditions, which could alter the outcome. The present study aimed to design loading/unloading cups with mechanical properties that r esemble those of the cartilage at the hip level. Through the impression and scanning of the cast models obtained, a digital 3D model was created in STL format and this was processed in order to obtain the computer numerical control (CNC) trajectories of the printing head. For prototyping using additive manufacturing technology, a thermoplastic polymer with biochemical properties, such as tensile strength, that resemble those of the adult hip and a Stratasys FORTUS 250 mc CNC machine were used. Loading/unloading cups with similar anatomy and biomechanical forces compared with those of the adult hip were created, which allowed the experimental simulation of the conditions during walking. PMID:35126705 | PMC:PMC8794553 | DOI:10.3892/etm.2022.11125 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.