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1.
J Surg Oncol ; 129(1): 26-31, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38018354

RESUMO

Hydrocephalus is routinely treated with ventriculoperitoneal shunt drainage of cerebrospinal fluid (CSF), a procedure plagued by high morbidity and frequent revisions. Vascularized submental lymph node (VSLN) transplants act as lymphatic pumps to drain interstitial fluid (ISF) from lymphedematous extremities. As the field of neuro-lymphatics comes to fruition, we hypothesize the efficacy of VSLN in the drainage of intracranial CSF-ISF. We report novel placement of VSLN in the temporal subdural space in two patients diagnosed with symptomatic communicating hydrocephalus. At a minimum follow-up of 1 month postoperatively, both experienced radiological and clinical improvements.


Assuntos
Hidrocefalia , Linfedema , Humanos , Hidrocefalia/cirurgia , Linfonodos/transplante , Linfedema/cirurgia , Extremidades , Pescoço
2.
J Mater Chem B ; 11(33): 8007-8019, 2023 08 24.
Artigo em Inglês | MEDLINE | ID: mdl-37530140

RESUMO

Craniofacial/jawbone deformities remain a significant clinical challenge in restoring facial/dental functions and esthetics. Despite the reported therapeutics for clinical bone tissue regeneration, the bioavailability issue of autografts and limited regeneration efficacy of xenografts/synthetic bone substitutes, however, inspire continued efforts towards functional conjugation and improvement of bioactive bone graft materials. Regarding the potential of nitric oxide (NO) in tissue engineering, herein, functional conjugation of NO-delivery dinitrosyl iron complex (DNIC) and osteoconductive bone graft materials was performed to optimize the spatiotemporal control over the delivery of NO and to activate synergistic osteogenesis and angiogenesis in rat calvaria bone defects. Among three types of biomimetic DNICs, [Fe2(µ-SCH2CH2COOH)2(NO)4] (DNIC-COOH) features a steady kinetics for cellular uptake by MC3T3-E1 osteoblast cells followed by intracellular assembly of protein-bound DNICs and release of NO. This steady kinetics for intracellular delivery of NO by DNIC-COOH rationalizes its biocompatibility and wide-spectrum cell proliferation effects on MC3T3-E1 osteoblast cells and human umbilical vein endothelial cells (HUVECs). Moreover, the bridging [SCH2CH2COOH]- thiolate ligands in DNIC-COOH facilitate its chemisorption to deproteinized bovine bone mineral (DBBM) and physisorption onto TCP (ß-tricalcium phosphate), respectively, which provides a mechanism to control the kinetics for the local release of loaded DNIC-COOH. Using rats with calvaria bone defects as an in vivo model, DNIC-DBBM/DNIC-TCP promotes the osteogenic and angiogenic activity ascribed to functional conjugation of osteoconductive bone graft materials and NO-delivery DNIC-COOH. Of importance, the therapeutic efficacy of DNIC-DBBM/DNIC-TCP on enhanced compact bone formation after treatment for 4 and 12 weeks supports the potential for clinical application to regenerative medicine.


Assuntos
Óxido Nítrico , Osteogênese , Ratos , Humanos , Animais , Bovinos , Ferro/farmacologia , Células Endoteliais da Veia Umbilical Humana , Crânio
3.
Front Cardiovasc Med ; 10: 1214116, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37469481

RESUMO

Secondary lymphedema is a common condition among cancer survivors, and treatment strategies to prevent or treat lymphedema are in high demand. The development of novel strategies to diagnose or treat lymphedema would benefit from a robust experimental animal model of secondary lymphedema. The purpose of this methods paper is to describe and summarize our experience in developing and characterizing a rat hindlimb model of lymphedema. Here we describe a protocol to induce secondary lymphedema that takes advantage of micro computed tomography imaging for limb volume measurements and visualization of lymph drainage with near infrared imaging. To demonstrate the utility of this preclinical model for studying the therapeutic benefit of novel devices, we apply this animal model to test the efficacy of a biomaterials-based implantable medical device.

4.
BMC Womens Health ; 23(1): 200, 2023 04 28.
Artigo em Inglês | MEDLINE | ID: mdl-37118756

RESUMO

BACKGROUNDS: Gynaecological cancer survivors may develop lower limb lymphoedema after surgery, which negatively impacts quality of life. The purposes of this study were (1) to assess the levels of symptom distress, depression, body image, and health-related quality of life (HRQoL); (2) to recognize factors associated with HRQoL related in gynaecologic cancer survivors with lower limb lymphoedema. METHODS: A cross-sectional study was conducted with convenience sampling of gynaecologic cancer survivors with lower limb lymphoedema. Gynaecologic cancer survivors were assessed for symptom distress, depression, body image, and HRQoL. Multiple regression analysis was conducted to recognize the factors associated with HRQoL. Independent-samples t-test was used to compare symptom distress, depression, body image, and HRQoL by grade of lymphoedema. RESULTS: The most common distressing symptoms of lower limb lymphoedema were lower extremity oedema, lower extremity tightness, and lower extremity stiffness. Worse HRQoL was associated with more symptom distress, less satisfaction with body image, a high grade of lymphoedema, and a longer duration of lower limb lymphoedema. These factors explained 76.5% of the variance in HRQoL. Gynaecologic cancer survivors with late grade lymphoedema experienced lower HRQoL and higher levels of symptom distress, depression, and greater dissatisfaction with body image than those who had early grade lymphoedema. CONCLUSIONS: Symptom distress had the strongest association with overall HRQoL and with all individual domains of HRQoL, except mental function. These results suggest that educating gynaecologic cancer survivors to assess lower limb lymphoedema-related problems, providing symptom management, and guiding survivors in physical activity to relieve lower extremity discomfort can improve HRQoL.


Assuntos
Sobreviventes de Câncer , Neoplasias dos Genitais Femininos , Linfedema , Feminino , Humanos , Qualidade de Vida , Estudos Transversais , Taiwan , Linfedema/etiologia , Sobreviventes , Neoplasias dos Genitais Femininos/complicações , Extremidade Inferior , Inquéritos e Questionários
5.
J Surg Oncol ; 127(7): 1103-1108, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-36912899

RESUMO

BACKGROUND: The study investigated the anatomy of the retroauricular lymph node (LN) flap and evaluate its surgical feasibility as a new donor site for a free LN flap in lymphedema surgery. METHODS: Twelve adult cadavers were examined. The course and perfusion of the anterior auricular artery (AAA) and the location and sizes of the retroauricular LNs were studied. RESULTS: The AAA was available in 87% and absent in 13% specimens. The AAA's origin had a mean vertical distance of 12.2 ± 6.9 mm and a mean horizontal distance of 19.1 ± 4.2 mm from the superior attachment of the ear. The mean diameter of the AAA was 0.8 ± 0.2 mm. The mean number of LN per region was 7.7 ± 2.3, with an average LN size of 4.1 ± 1.9 × 3.2 ± 1.7 mm. The LN were categorized into anterior (G1) and posterior (G2) groups, with a total of 59 and 10 LN, respectively. In a cluster analysis, three LN clusters could be detected across the anterior group (G1). CONCLUSIONS: The retroauricular LN flap is a delicate but feasible flap with reliable anatomy, containing a mean of 7.7 LNs.


Assuntos
Retalhos de Tecido Biológico , Vasos Linfáticos , Linfedema , Adulto , Humanos , Estudos de Viabilidade , Linfonodos/irrigação sanguínea , Retalhos de Tecido Biológico/irrigação sanguínea , Linfedema/cirurgia
6.
Plast Reconstr Surg ; 151(5): 1005-1015, 2023 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-36534068

RESUMO

BACKGROUND: The pathophysiology of adipose proliferation or differentiation in extremity lymphedema has not been thoroughly studied. This study investigated the impacts of the lymph harvested from lymphedematous limbs on the adipogenesis of adipose-derived stem cells (ASCs). METHODS: ASCs were isolated from the adipose tissue of normal extremities and cultured with lymph collected from Cheng lymphedema grade III to IV patients or adipogenic differentiation medium (ADM) and further subjected to differentiation and proliferation assay. The expression of adipogenesis genes was examined by real-time polymerase chain reaction to investigate the effect of lymph on ASCs. The level of adipogenic cytokines in the lymph was also evaluated. RESULTS: The adipocytes were significantly larger in lymphedema fat tissue compared with that in normal fat tissues ( P < 0.00). The adipogenesis of ASCs cultured in lymph was significantly enhanced compared with in ADM ( P = 0.008) on day 10, suggesting that the adipogenesis of ASCs was promoted under the lymph-cultured environment. The expression of adipogenesis genes, peroxisome proliferator-activated receptor ( P = 0.02), CAAT/enhancer-binding protein α ( P = 0.008); fatty-acid binding protein ( P = 0.004), and lipoprotein lipase ( P = 0.003), was statistically elevated when the ASCs were cultured with lymph. The insulin content in lymph was statistically higher in lymph ( P < 0.001) than in plasma. CONCLUSIONS: The adipogenesis of ASCs was promoted under the lymph-cultured environment with statistically increased adipogenesis genes of peroxisome proliferator-activated receptor, CAAT/enhancer-binding protein α, fatty-acid binding protein, and lipoprotein lipase. The excess lymph accumulated in the lymphedematous extremity contained a greater insulin/insulin-like growth factor-2. These adipogenic factors promoted the expression of early adipogenesis genes and led ASCs to undergo adipogenesis and differentiated into adipocytes. CLINICAL RELEVANCE STATEMENT: The accumulation of adipose tissue in the lymphedema region was contributed from the content of excess lymph.


Assuntos
Insulinas , Linfedema , Humanos , Adipogenia/fisiologia , Lipase Lipoproteica/metabolismo , Lipase Lipoproteica/farmacologia , Receptores Ativados por Proliferador de Peroxissomo/metabolismo , Receptores Ativados por Proliferador de Peroxissomo/farmacologia , Adipócitos/fisiologia , Tecido Adiposo , Diferenciação Celular/genética , Células-Tronco/fisiologia , Insulinas/metabolismo , Insulinas/farmacologia , Células Cultivadas
7.
J Surg Oncol ; 126(7): 1169-1175, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35950942

RESUMO

BACKGROUND: This study investigated the effect of nanofibrillar collagen scaffold (BioBridge) implantation from the affected limb to the unaffected contralateral femoral vein or lymph node in a rat model. METHODS: Hind limb lymphedema in Lewis rats was created with lymphadenectomy and inguinal circumcision without radiation. The volumetric difference (greater than 5%) using computed tomography and indocyanine green fluorescence evaluated the progress of lymphedema at 4 weeks. The lymphedema rats have separated into Group I: Controls; Group II: implanted BioBridge to the contralateral femoral vein; and Group III: implanted BioBridge to the contralateral inguinal lymph node. RESULTS: A total of 14 of 30 (46.7%) rats developed hind limb lymphedema with a mean volume difference of 5.83 ± 0.99% and showed diffuse dermal backflow at 4 weeks postlymphadenectomy. Four weeks postimplantation of BioBridge, the mean volumetric difference was 5.62 ± 2.11%, 4.97 ± 0.59%, and -2.47 ± 2.37% in Group I, II, and III, respectively (p < 0.05). The dermal backflow on the affected limb increased in Groups I and II but decreased in Group III. CONCLUSIONS: Implantation of BioBridge from the affected limb to the contralateral inguinal lymph node significantly reduced the hind limb lymphedema at 4 weeks.


Assuntos
Linfangiogênese , Linfedema , Masculino , Animais , Ratos , Ratos Endogâmicos Lew , Linfonodos/cirurgia , Linfonodos/irrigação sanguínea , Linfedema/cirurgia , Colágeno
8.
J Surg Oncol ; 126(7): 1162-1168, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35960614

RESUMO

BACKGROUND: This study investigated breast cancer-related lymphedema (BCRL) and its correlation with the incidence of cellulitis and mortality in the National Health Insurance (NHI) database in Taiwan. METHODS: Between 2004 and 2014, the NHI database of patients with breast cancer who underwent surgical procedures, adjuvant therapies, BCRL, cellulitis, and mortality were retrospectively reviewed. Cox regression was used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) for incidence of BCRL and cellulitis in different treatment groups. The associations of BCRL with the incidence of cellulitis and mortality were further analyzed using the Kaplan-Meier curve. RESULTS: Among 100 301 patients, 5464 (5.4%) developed BCRL with a median onset of 1.3 years. At a mean follow-up of 4.77 years, the incidence of cellulitis in the BCRL group (12.7%, 694/5464 patients) was significantly higher than in the no-BCRL group (2.73%, 2589/94 837 patients) (HR: 3.74; 95% CI: 3.43-4.08; p < 0.0001). At a mean follow-up of 5.77 years, the mortality rate in the cellulitis group (34.21%, 1123/3283 patients) was significantly greater than in the no-cellulitis group (16.29%, 15 804/97 018 patients) (HR: 1.17; 95% CI: 1.1-1.24; p < 0.0001). CONCLUSIONS: BCRL had a significantly higher incidence of cellulitis and mortality.


Assuntos
Linfedema Relacionado a Câncer de Mama , Neoplasias da Mama , Linfedema , Humanos , Feminino , Linfedema/epidemiologia , Linfedema/etiologia , Linfedema/terapia , Incidência , Neoplasias da Mama/complicações , Neoplasias da Mama/cirurgia , Estudos Retrospectivos , Linfedema Relacionado a Câncer de Mama/epidemiologia
9.
J Surg Oncol ; 126(6): 970-977, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35811436

RESUMO

BACKGROUND: This study investigated the outcomes of the distal facial vein catheterization (DFVC) to manage venous thrombosis in vascularized submental lymph nodes (VSLN) flap transplantations. METHODS: Between March 2017 and December 2020, patients who underwent VSLN flaps were divided into Group I: combined delayed primary retention sutures (DPRS) with DFVC, and Group II: DPRS alone. Primary outcomes were early (within 72 h) and late venous thrombosis. Secondary outcomes included other nonvascular complications and mechanical factors of the thrombosis. RESULTS: A total of 105 patients who underwent 106 VSLN flaps, including 37 and 69 flaps in Groups I and II, respectively, were included. There were no statistically significant differences in age, body mass index, Taiwan lymphoscintigraphy staging, and surgical factors between the two groups (all p > 0.05). Early venous thrombosis requiring re-exploration developed in one (2.7%) and three (4.3%) flaps in Groups I and II, respectively (p = 0.20). One flap (2.7%) and eight (11.5%) flaps developed late venous thrombosis in Groups I and II, respectively (p < 0.01). There was no statistically significant difference in total complication rates between both groups (p = 0.9). CONCLUSION: VSLN flap transplantation had a significantly higher risk of late venous thrombosis. DFVC significantly decreased the late venous thrombosis.


Assuntos
Linfedema , Trombose , Cateterismo , Humanos , Linfonodos/patologia , Linfedema/cirurgia , Retalhos Cirúrgicos/irrigação sanguínea
10.
Ann Surg Oncol ; 29(12): 7868-7878, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35780215

RESUMO

BACKGROUND: Secondary lymphedema is a debilitating morbidity. This study investigated the outcomes of vascularized lymph node transfer (VLNT) in elderly patients with secondary upper extremity lymphedema. METHODS: Between 2008 and 2018, elderly (≥65 years) patients with secondary upper extremity lymphedema who underwent VLNT were retrospectively reviewed. Cheng's Lymphedema Grading, Taiwan Lymphoscintigraphy Staging, and indocyanine green lymphography were used to select the procedures. Outcome measurements included complications, circumferential difference, episodes of cellulitis, and the Lymphedema-Specific Quality of Life questionnaire (LYMQoL). RESULTS: Eleven patients with a mean age of 70.2 ± 5.3 years (range 65-80 years) who underwent VLNT survived and no major complications were encountered. At a mean follow-up of 6.5 ± 3.6 years (range 2-13 years), the mean limb circumferential difference was significantly improved from 25.6 ± 11.5% to 8.3 ± 4.2% (p = 0.016), and the mean episode of cellulitis was statistically reduced from 2.4 ± 1.3 to 0.4 ± 0.9 times/year (p = 0.007). At a follow-up of 24 months, four domains of Function (from 30.6 ± 2.8 to 14.5 ± 2.5), Appearance (from 18.2 ± 1.9 to 8.5 ± 2.1), Symptoms (from 30.4 ± 5.9 to 10.9 ± 1.0) and Mood (from 29.2 ± 4.4 to 10.7 ± 1.0), as well as overall LYMQoL score (from 3.9 ± 1.1 to 7.4 ± 0.5), showed statistical improvement (all p < 0.05). CONCLUSIONS: VLNT for secondary upper extremity lymphedema in elderly patients significantly decreased the limb circumferential difference and frequency of cellulitis and improved quality of life without using compression garments postoperatively.


Assuntos
Linfedema , Qualidade de Vida , Idoso , Idoso de 80 Anos ou mais , Celulite (Flegmão)/complicações , Celulite (Flegmão)/patologia , Humanos , Verde de Indocianina , Linfonodos/cirurgia , Linfedema/etiologia , Linfedema/patologia , Linfedema/cirurgia , Estudos Retrospectivos , Extremidade Superior/patologia , Extremidade Superior/cirurgia
12.
J Surg Oncol ; 126(4): 633-639, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35678754

RESUMO

BACKGROUND: This study investigated the long-term effects of arterial ischemia and venous occlusion on lymph node drainage function in a rat model. METHODS: Bilateral groin lymph node flaps of 18 Lewis rats were dissected. The pedicle artery was clamped for 4, 5, and 6 h (A4, A5, and A6 groups), and the vein for 3, 4, and 5 h (V3, V4, and V5 groups) in six flaps. At 4 weeks, the evaluations included gross morphomics, indocyanine green (ICG) lymphography, histological section, immunofluorescence of terminal deoxynucleotidyl transferase assay, and heme oxygenase-1 (HO-1) stain. RESULTS: The lymph node flaps developed shrinkage and partial necrosis in A5, A6, V4, and V5 groups. Hemorrhage in the lymph node cortex and medulla was observed histologically in A5, A6, and V5 groups. ICG lymphography showed loss of lymphatic drainage function in 2 of 6 flaps in A6 and V5 groups. Cell death was shown partly in cortical follicles in A5 and V4 groups and completely in A6 and V5 groups. The HO-1 expression was statistically increased in A5 and V5 groups, respectively (p < 0.05). CONCLUSIONS: The critical arterial ischemia and venous occlusion time were 4 h at 4 weeks of follow-up.


Assuntos
Linfedema , Doenças Vasculares , Animais , Virilha , Verde de Indocianina , Isquemia , Linfonodos/irrigação sanguínea , Linfedema/cirurgia , Ratos , Ratos Endogâmicos Lew
13.
J Surg Oncol ; 125(8): 1202-1210, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35298037

RESUMO

BACKGROUND: This study investigated the outcomes of nipple-sparing mastectomy (NSM) with a deep inferior epigastric perforator (DIEP) flap using delayed primary retention suture (DPRS) to achieve superior breast esthetics. METHODS: Between December 2010 and March 2021, patients who underwent NSM with DIEP flap were inset with or without a skin paddle (using DPRS) as Group A or B, respectively. Demographics, operative findings, complications, BREAST-Q questionnaire, and Manchester scar scale were compared between two groups. RESULTS: Twelve patients underwent 12 unilateral reconstructions in Group A, while 12 patients underwent 13 DIEP flaps in Group B. There was no significant difference in demographics, ischemia time, flap-used weight and percentage, complications of hematoma, infection, re-exploration, partial flap loss, and total flap loss (All p > 0.05, respectively). At a mean 9 months of follow-up, the Breast-Q "Satisfaction with surgeon" domain was significant in Group B (p = 0.04). At a mean 12 months of follow-up, the overall Manchester scar scale of 10.3 in Group B was statistically superior to 12.6 in Group A (p = 0.04). CONCLUSIONS: The NSM with a DIEP flap using DPRS is a reliable and straightforward technique. It can provide greater cosmesis of the reconstructed breast mound in a single-stage procedure.


Assuntos
Neoplasias da Mama , Mamoplastia , Retalho Perfurante , Neoplasias da Mama/cirurgia , Cicatriz/cirurgia , Artérias Epigástricas/cirurgia , Feminino , Humanos , Mamoplastia/métodos , Mastectomia/métodos , Mamilos/cirurgia , Satisfação do Paciente , Retalho Perfurante/cirurgia , Estudos Retrospectivos , Suturas
14.
J Surg Oncol ; 125(6): 958-967, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35107827

RESUMO

BACKGROUND: Heparin-induced thrombocytopenia and thrombosis (HITT) may result in microsurgical flap failure. This study investigated the outcomes of HITT in primary lymphedema patients who underwent vascularized lymph node transplantations (VLNT). METHODS: Between 2012 and 2019, primary lymphedema patients who underwent VLNTs were retrospectively included. The 4Ts score was used to categorize patients into HITT (scores of 5-7) and non-HITT (score < 5) groups. Outcome evaluations included the re-exploration rate, success rate, circumferential differences, cellulitis episodes, and Lymphedema Specific Quality of Life Questionnaire (LYMQoL) scores. RESULTS: Twenty-six and 15 patients with 31 and 16 VLNTs were included in the HITT and non-HITT groups, respectively. The HITT group had significantly greater first, second and third re-exploration rates of 38.7% (12/31), 25.7% (8/31), and 6.5% (2/31) than the non-HITT group (6.3%, 0%, and 0%, all p < 0.01), respectively. The platelet counts significantly decreased by 21.0% in the HITT group compared with the non-HITT group (14%) on postoperative Day one (p < 0.01) with a cutoff value of 17% and AUC = 0.88. CONCLUSIONS: HITT may cause a high re-exploration rate of VLNTs in primary lymphedema patients. The 17% reduction in platelets on postoperative day one was an early sign for detecting HITT.


Assuntos
Linfedema , Trombocitopenia , Trombose , Humanos , Linfonodos , Linfedema/etiologia , Linfedema/cirurgia , Qualidade de Vida , Estudos Retrospectivos , Trombocitopenia/induzido quimicamente , Trombose/induzido quimicamente
15.
Front Med (Lausanne) ; 8: 772424, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34790684

RESUMO

Vaccination plays an important role during the COVID-19 pandemic. Vaccine-induced thrombotic thrombocytopenia (VITT) is a major adverse effect that could be lethal. For cancer patients, cancer-related thromboembolism is another lethal complication. When cancer patients receive their COVID-19 vaccines, the following thromboembolic events will be more complicated. We presented a case recently diagnosed with pancreatic cancer, who had received the mRNA-1273 (Moderna) vaccination 12 days prior. Ischemic stroke and VITT were also diagnosed. We aggressively treated the patient with steroids, immunoglobulin, and plasma exchange. The titer of anti-platelet factor four and d-dimer level decreased, but the patient ultimately died. The complicated condition of VITT superimposed cancer-related thromboembolism was considered. To our knowledge, only one case of mRNA-1273 related VITT was reported, and this case study was the first to report a cancer patient who was diagnosed with VITT after mRNA-1273 vaccination. Therefore, when the need for vaccination among cancer patients increased under the current COVID-19 pandemic, the possible risk of VITT for cancer patients should be carefully managed. Further studies of the risk evaluation of the COVID-19 vaccine in cancer patients might be required in the future.

16.
Plast Reconstr Surg Glob Open ; 9(9): e3822, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34549009

RESUMO

Demand for gender-affirming phalloplasty continues to grow worldwide, and the extended radial forearm flap phalloplasty remains one of the most commonly performed techniques. One potential morbidity that has emerged is postoperative donor site lymphedema, which was susceptible to develop after harvest of extended radial forearm flap. In the setting of preventative or immediate lymphovenous bypass (LVB) with axillary lymph node dissection for the treatment of breast cancer, it is possible that a subset of patients undergoing gender-affirmation surgery would benefit from immediate lymphatic reconstruction at the time of primary phalloplasty. Here, we report a case in which intraoperative indocyanine green lymphography demonstrated lymphatic obstruction within the left donor hand after flap harvest, and was treated with immediate LVB at the time of extended radial forearm phalloplasty. Two surgical teams operated simultaneously: the reconstructive urology team performed the vaginectomy, perineal urethral lengthening, scrotoplasty, and perineal reconstruction; and the microsurgery team harvested the extended radial forearm, constructed the penile urethra, shaped the phallus, and performed the immediate LVB. Lymphography showed no dermal backflow at 5 months follow-up; at 13 months, the patient demonstrated no signs or symptoms of lymphedema in the left forearm or hand. To the authors' best knowledge, this is the first report of confirmed donor site lymphedema following extended radial forearm flap harvest, which was successfully treated with immediate LVB. Careful evaluation of lymphatic vessels with indocyanine green lymphography in the forearm before and after extended flap harvest may be warranted.

17.
Plast Reconstr Surg ; 148(3): 425e-436e, 2021 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-34432699

RESUMO

BACKGROUND: Vascularized lymph node transfer is an efficacious treatment for extremity lymphedema. This study investigated the outcome of retrograde manual lymphatic drainage for vascularized lymph node transfer to distal recipient sites. METHODS: Lymphedema patients who underwent either complete decongestive therapy or vascularized lymph node transfer between 2013 and 2018 were retrospectively included. Retrograde manual lymphatic drainage was started with intermittent manual compression and the assistance of a sphygmomanometer and proximal-to-distal massage of the limb 1 month postoperatively. Outcomes evaluations used the circumferential reduction rate and the Lymphedema-Specific Quality-of-Life Questionnaire. Outcomes of vascularized lymph node transfer to proximal versus distal recipient sites in the literature between 2006 and 2018 were also compared. RESULTS: One hundred thirty-eight unilateral extremity lymphedema patients, including 68 patients in the complete decongestive therapy group and 70 patients in the vascularized lymph node transfer group, were included. The mean circumferential reduction rate of 38.9 ± 2.5 percent in the vascularized lymph node transfer group was statistically greater than the 13.2 ± 10.1 percent rate in the complete decongestive therapy group (p = 0.01). At a mean follow-up of 36 months, the improvement of overall Lymphedema-Specific Quality-of-Life Questionnaire score from 3.8 ± 0.3 to 7.5 ± 1.8 in the vascularized lymph node transfer group was statistically greater than that in the complete decongestive therapy group (from 4.7 ± 0.9 to 5.0 ± 1.9; p < 0.01). In total, 536 lymphedema patients who underwent 548 vascularized lymph node transfers in 23 published articles were reviewed; the distal recipient-site group was found to have more efficacious results than the proximal recipient-site group. CONCLUSION: Vascularized lymph node transfer to a distal recipient site with standard retrograde manual lymphatic drainage significantly improved circumferential reduction rates and Lymphedema-Specific Quality-of-Life Questionnaire scores. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.


Assuntos
Linfonodos/transplante , Linfedema/terapia , Drenagem Linfática Manual/métodos , Retalho Perfurante/transplante , Extremidades , Feminino , Humanos , Linfonodos/irrigação sanguínea , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do Tratamento
18.
Nanomaterials (Basel) ; 11(7)2021 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-34209111

RESUMO

Anticancer nanomedicines have been studied over 30 years, but fewer than 10 formulations have been approved for clinical therapy today. Despite abundant options of anticancer drugs, it remains challenging to have agents specifically target cancer cells while reducing collateral toxicity to healthy tissue. Nanocompartments that can be selective toward points deeply within malignant tissues are a promising concept, but the heterogeneity of tumor tissue, inefficiency of cargo loading and releasing, and low uniformity of manufacture required from preclinical to commercialization are major obstacles. Technological advances have been made in this field, creating engineered nanomaterials with improved uniformity, flexibility of cargo loading, diversity of surface modification, and less inducible immune responses. This review highlights the developmental process of approved nanomedicines and the opportunities for novel materials that combine insights of tumors and nanotechnology to develop a more effective nanomedicine for cancer patients.

19.
J Surg Oncol ; 124(4): 510-520, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34133023

RESUMO

BACKGROUND: Advantages of one-stage implant-based reconstructions include expedited surgery and recovery. This study aimed to investigate clinical and patient-reported outcomes in one-stage implant-based breast reconstructions without acellular dermal matrix (ADM). METHODS: A prospectively collected database from 2002 to 2018 was retrospectively reviewed. One-stage and two-stage groups were compared for demographics, implant properties, early complications (hematoma, seroma, poor wound healing, implant removal), late complications (skin necrosis, capsular contracture, implant exposure, implant rupture), revision procedures, and Breast-Q questionnaire outcomes. RESULTS: A total of 223 patients, 187 one-stage (84%) and 36 two-stage (16%) patients were recruited. At a mean follow-up of 124.9 and 92.5 months, respectively (p < .01), there were no differences in early (p = .85) or late (p = .23) complications or revision procedures (p = .12). Eighty patients (36%) returned the Breast-Q questionnaire (60 one-stage, 20 two-stage patients). There were no statistical differences in patient reported outcomes in breast well-being (p = .07), psychosocial well-being (p = .84), or sexual well-being (p = .78). CONCLUSIONS: One-stage implant-based breast reconstruction without an ADM is a viable reconstruction providing comparable outcomes to two-stage procedures, with the benefit of minimal complications, a shorter reconstructive journey, and satisfactory quality of life.


Assuntos
Implante Mamário/métodos , Neoplasias da Mama/cirurgia , Mamoplastia/métodos , Medidas de Resultados Relatados pelo Paciente , Qualidade de Vida , Expansão de Tecido/métodos , Derme Acelular , Adulto , Idoso , Neoplasias da Mama/patologia , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Fatores de Tempo
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