BACKGROUND:Breast reconstruction following prophylactic mastectomy in women with ptotic or hypertrophic breasts often poses challenges. We describe a combined technique of large-volume fat grafting (>100 mL) and an inferior dermal flap, aiming to improve aesthetic outcomes and patient satisfaction. METHODS:We conducted a retrospective analysis of 21 patients undergoing immediate breast reconstruction with the described technique. All patients were asked to complete the BREAST-Q questionnaire preoperatively and at least 12 months postoperatively (median interval: 20 months). Statistical analysis (Wilcoxon signed-rank test) was used to assess changes in satisfaction and well-being; aesthetic outcomes were scored by an independent, multidisciplinary team. RESULTS:Among 13 patients with complete BREAST-Q data, satisfaction with the breasts increased significantly from a median score of 38-85 (p = 0.002), psychosocial well-being from 57-70 (p = 0.045), and physical well-being (chest) from 68 to 81 (p = 0.045). Sexual well-being rose from 47-63 (p = 0.023). Aesthetic evaluation by an independent panel showed notable improvements in breast symmetry, shape, and overall appearance. Minimal and asymptomatic fat necroses or oil liponecrotic pseudocysts were observed. CONCLUSIONS:Combining large-volume fat grafting with an inferior dermal flap appears promising for women with ptotic breasts, yielding high satisfaction and low complication rates. Despite requiring multiple operative stages, this autologous reconstruction technique may offer a less invasive alternative for high-risk patients seeking natural outcomes without implants.

3D bioprinting is transforming tissue engineering by enabling spatial arrangement of cells and cell aggregates within supportive hydrogels. Among available materials, alginate remains widely used for its biocompatibility, printability, and cost-effectiveness. However, its bioinert nature and lack of adhesive moieties restrict its capacity to support essential processes like cell adhesion, migration, and proliferation. In this study, we propose a comprehensive approach to enhance alginate hydrogels focusing on stem, stromal, and endothelial cell types to support extended growth and vascular network formation. Key innovations include the incorporation of the TYRAY peptide in 3D alginate hydrogels─its first application in this context─to promote cell adhesion and migration, accompanied by Ca(OH)2-modified surfaces for stable hydrogel anchoring and an ultrasonic mist cross-linking to preserve 3D structure fidelity. Functionalization with the TYRAY peptide significantly enhanced cell proliferation, promoted multicellular spheroid fusion, and supported endothelial network development in comparative culture setting. Together, these findings establish this defined, xeno-free alginate system as a versatile bioink material suitable for 3D culture and bioprinting applications.

AIM:The reconstruction of large skin tumors in the head and neck region is performed in our center with pedicled flap or free flap. In microvascular reconstructive surgery, the choice of the flap must consider many factors, such as the size and composition of the tissue defect, the distance between the recipient vessels and the defect, or even the donor site morbidity. Taking the resulting quality of life and the donor site morbidity into the account when choosing a reconstructive method is an important pillar of modern reconstructive surgery. METHODS:In this publication, we present a case report of a rarely used SCIP (superficial circumflex iliac artery perforator) flap for the reconstruction of the defect after squamous cell skin cancer tumor resection in temporal region (8×9 cm). RESULTS:The successful SCIP flap is first published in our national literature in this case report. CONCLUSIONS:SCIP flap usefully completes our reconstructive options due to its low donor site morbidity and its possibility to be harvested in parallel with primary surgery.

Background: Donor nerve selection is a crucial factor in determining clinical outcomes of facial reanimation. Although dual innervation approaches using two neurotizers have shown promise, there is a lack of evidence-based comparison in the literature. Furthermore, no animal model of dual reinnervation has yet been published. This study aimed to establish such a model and verify its technical and anatomical feasibility by performing dual-innervated reanimation approaches in Wistar rats. Methods: Fifteen Wistar rats were divided into four experimental groups and one control group. The sural nerve was exposed and used as a cross-face nerve graft (CFNG), which was then anastomosed to the contralateral buccal branch of the facial nerve through a subcutaneous tunnel on the forehead. The CFNG, the masseteric nerve (MN), and the recipient nerve were coapted in one or two stages. The length and width of the utilized structures were measured under an operating microscope. Return of whisker motion was visually confirmed. Results: Nine out of the eleven rats that underwent surgery survived the procedure. Whisker motion was observed in all experimental animals, indicating successful reinnervation. The mean duration of the surgical procedures did not differ significantly between the experimental groups, ensuring similar conditions for all groups. Conclusions: Our experimental study confirmed that the proposed reanimation model in Wistar rats is anatomically and technically feasible, with a high success rate, and shows good prospects for future experiments.

The Department of Plastic and Aesthetic Surgery, St. Anne's University Hospital in Brno, and Faculty of Medicine of Masaryk University, Brno, has a long history of surgical treatment of lymphedema and elephantiasis, which started in 1970s. There were many types of surgeries described and performed at our department - starting with prof. Bařinka's radical operation of elephantiasis, then lower limb end-to-side lymphovenous anastomosis pulled through the wall to the great saphenous vein, and genital lymphedema reduction. We call this era "the first period" of surgical lymphedema treatment. "The second period" started in 2016 by using free flaps with lymph nodes or vascularized lymph nodes and using microsurgical techniques of end-to-end, end-to-side and side-to-end lymphovenous anastomoses to the subcutaneous veins of a small calibre, which then drain the lymph into the blood stream. "The third period" started 2 years ago after the visit of prof. Yang from Taiwan - we started to use the method of single stitch end-to-side anastomosis to big subcutaneous veins like the great saphenous vein or the cephalic vein.

Background: The recovery of the spontaneous smile has become a primary focus in facial reanimation surgery and its major determinant is the selected neurotizer. We aimed to compare the spontaneity outcomes of the most preferred neurotization methods in free functional muscle transfer for long-standing facial paralysis. Methods: The Embase, Ovid Medline, and PubMed databases were queried with 21 keywords. All clinical studies from the last 20 years reporting the postoperative spontaneity rate for specified neurotization strategies [cross-face nerve graft (CFNG), contralateral facial nerve (CLFN), motor nerve to the masseter (MNM), and dual innervation (DI)] were included. A metaanalysis of prevalence was performed using Freeman-Tukey double arcsine transformation, I2 statistic, and generic inverse variance with a random-effects model. Risk Of Bias In Non-randomized Studies of Interventions and Newcastle-Ottawa scale were used to assess bias and study quality. Results: The literature search produced 2613 results and 473 unique citations for facial reanimation. Twenty-nine studies including 2046 patients were included in the systematic review. A meta-analysis of eligible data (1952 observations from 23 studies) showed statistically significant differences between the groups (CFNG: 0.94; 95% confidence interval [CI], 0.76-1.00, CLFN: 0.91; 95% CI, 0.49-1.00, MNM: 0.26; 95% CI, 0.05-0.54, DI: 0.98; 95% CI, 0.90-1.00, P < 0.001). In pairwise comparisons, statistically significant differences were found between MNM and other neurotization strategies (P < 0.001 in CFNG compared with MNM, P = 0.013 for CLFN compared with MNM, P < 0.001 for DI compared with MNM). Conclusions: DI- and CLFN-driven strategies achieved the most promising outcomes, whereas MNM showed the potential to elicit spontaneous smile at a lower extent. Our meta-analysis was limited primarily by incongruency between spontaneity assessment systems. Consensus on a standardized tool would enable more effective comparisons of the outcomes. (c) 2023 British Association of Plastic, Reconstructive and Aesthetic Surgeons. Published by Elsevier Ltd. All rights reserved.

Cleft lip and cleft palate are among the most common congenital defects of the head. The treatment of clefts is centralized, multidisciplinary, and involves a plastic surgeon, orthodontist, anesthesiologist, clinical speech therapist, and other specialists. While the incidence of cleft lip and cleft palate remains approximately unchanged, the approach to their treatment is evolving. Modern treatment methods increasingly include 3D printing and the associated therapeutic and educational possibilities.

The effect of silica (SiO2) addition (0 wt%-20 wt%) on the microstructural and mechanical properties, as well as the in vitro response of calcium phosphate scaffolds for potential application in bone tissue engineering (BTE) was investigated in this research. Scaffolds characterized by high porosity (77%-88 %) and interconnected spherical pores with a broad range of pore sizes (5-600 mu m) were fabricated using in-situ foaming method. Incorporated silica affected the phase transformation of hydroxyapatite (HA) to beta-tricalcium phosphate (beta-TCP) and led to the development of new crystalline silica-rich phases like silicocarnotite and wollastonite. The reinforcement of silica became apparent during the tests of mechanical properties. Scaffolds with 5 wt% of SiO2 exhibited compressive strength (1.13 MPa) higher than pure HA scaffolds (0.93 MPa). Bone bonding potential of the materials was tested in simulated body fluid (SBF), demonstrating this potential in silica-doped samples. Additionally, degradation experiments showed gradual material degradation, making it suitable for BTE applications. Furthermore, cell culture studies using human mesenchymal stromal cells (MSC) confirmed the scaffold's non- toxicity and provided insights into how the silica content influences cell viability, morphology, and osteogenic potential. The findings of this study offer valuable insights into the design and development of advanced scaffolds with tailored properties for effective BTE applications.

Background: One of the critical factors in facial reanimation is selecting the donor nerve. The most favored neurotizers are the contralateral facial nerve with a cross-face nerve graft (CFNG) and motor nerve to the masseter (MNM). A relatively new dual innervation (DI) method has shown successful results. This study aimed to compare the clinical outcomes of different neurotization strategies for free gracilis muscle transfer (FGMT). Methods: The Scopus and WoS databases were queried with 21 keywords. Three-stage article selection was performed for the systematic review. Articles presenting quantitative data for commissure excursion and facial symmetry were included in meta-analysis, using random-ef- fects model. ROBINS-I tool and Newcastle-Ottawa scale were used to assess bias and study quality. Results: One hundred forty-seven articles containing FGMT were systematically reviewed. Most studies indicated CFNG as the first choice. MNM was primarily indicated in bilateral palsy and in elderly. Clinical outcomes of DI studies were promising. 13 studies including 435 observations (179 CFNG, 182 MNM, 74 DI) were eligible for meta-analysis. The mean change in commissure excursion was 7.15 mm (95% CI: 4.57-9.72) for CFNG, 8.46 mm (95% CI: 6.86-10.06) for MNM, and 5.18 mm (95% CI: 4.01-6.34) for DI. In pairwise comparisons, a significant difference was found between MNM and DI (p = 0.0011), despite the superior outcomes described in DI studies.

Introduction: The growing incidence and recurrence rate of breast cancer has influenced multiple strategies such as surgical interventions that serve as preventive measures for women at high risk. Prophylactic mastectomy seems to be the most effective tool in the primary prevention of breast cancer, but opinions are not uniform, especially among specialists. The goal of this presentation is to examine the effect of risk-reducing mastectomy, including breast cancer incidence, breast cancer mortality, disease-free survival, physical morbidity, and psychosocial outcomes in cohort of patients who underwent prophylactic mastectomy. Materials and Methods: We retrospectively reviewed the outcomes of 20 years of experience with prophylactic mastectomies performed at the department from 1999 to 2019. In this study were included patients who underwent bilateral prophylactic mastectomy with no breast cancer, and patients with breast cancer, if they underwent contralateral risk-reducing mastectomy, however, only the prophylactic side was considered in the analysis. Patients with bilateral breast cancer were excluded. Results: A total of 749 risk-reducing prophylactic mastectomy in 545 patients were performed at our department from 1999 to 2019. Bilateral prophylactic mastectomies were performed in 204 patients (37,4%), and 341 (62,6%) underwent a unilateral risk-reducing mastectomy secondary to cancer in the contralateral breast. Overall, 243 patients with BRCA1 mutations and 113 with BRCA2 mutations were included. Conclusion: Prophylactic mastectomy is highly preventive against breast cancer. Although further clinical studies are needed to determine the effectiveness of prophylactic mastectomies in individual indications. With the effectiveness of prophylactic mastectomy should also be taken into consideration the quality of life after the immediate breast reconstruction, and the associated complications.

Background: Identifying relevant perforators is crucial in planning a deep inferior epigastric perforator (DIEP) flap. Color Doppler ultrasonography (CDU) has gained popularity for localizing perforators; however, current evidence on its efficiency is still inconclusive. This study aimed to compare the efficiency of CDU with that of computed tomography angiography (CTA) in localizing and selecting the relevant perforators.Methods: In this randomized controlled trial, 60 patients undergoing DIEP flap breast reconstruction (uni- or bilateral) were randomly assigned to the CDU group (i.e., CDU was performed to map and select the relevant perforators preoperatively) or the CTA+CDU group (i.e., mapping was based on CTA and supplemented by CDU). CDU was performed by the same surgeon with a well-defined sonography experience from our previous study. The reference XY coordinates of the dissected perforators were measured intraoperatively, and deviations from preoperatively deducted coordinates were calculated (Delta CDU or Delta CTA+CDU). The flaps were categorized according to the number of dissected perforators, and adherence to the pre-operative strategy was evaluated.Results: Overall, 22 patients (30 flaps) in the CTA+CDU group and 27 (39 flaps) patients in the CDU group were evaluated. The average Delta CDU (0.6 cm) was significantly lower than the average Delta CTA+CDU (1.0 cm) (p < 0.001). Adherence to the mapping-based dissection strategy was higher in the CDU group; however, the difference was insignificant (p = 0.092).Conclusion: CDU is not inferior to CTA + CDU in localizing and selecting relevant DIEA perforators. Therefore, CDU mapping is a possible complementary or substitute modality for CTA mapping.(c) 2023 Published by Elsevier Ltd on behalf of British Association of Plastic, Reconstructive and Aesthetic Surgeons.

ntroduction: Breast cancer is the leading cause of neoplasm mortality among women. Several revention strategies have been implemented to early detect and prevent the cancer occurrence. The most effective protocol includes prevention mastectomy for the high-risk patients. In our study, we have compared the efficacy of subcutaneous mastectomy (SCM) and skin sparing mastectomy (SSM) in long-term follow up. Methods: We have included 201 female patients who have been treated at our department over the course of 20 years between 2000 and 2019. All the patients were at high risk of developing breast cancer and therefore were indicated for the prophylactic mastectomy. The main indication was the presence of the mutation in the BRCA1 or BRCA2 cluster, however, even in the lack of such mutation, the family history was sufficient for the mastectomy indication. Patients underwent either SCM, SSM or areola sparing mastectomy (ASM), and were allocated to aforementioned groups, respectively. We have collected the data regarding the reconstruction method along with age, weight, height, body mass index (BMI) and presence of predisposing genetic mutations such as BRCA positivity. Results: The patients who underwent SSM compared to those who underwent SCM were of higher age, with higher BMI and body mass. The patients in SSM group had statistically significantly higher BMI than in ASM. There was no difference in efficacy between patients who underwent SSM and SCM. The majority of patients (91.5%) were positive for BRCA1 or BRCA2 mutation. In our study, only four patients were tested negative for known breast cancer inducing mutation (three in SCM and one in SSM). The most common reconstruction method was an abdominal flap and breast implant. Conclusions: Prophylactic mastectomy is a reliable strategy for significantly reducing the number of breast cancer incidence in high-risk patients regardless of the selected method of mastectomy. These operations allow for the subsequent reconstruction with the whole spectrum of reconstructive options.

BACKGROUND:Perforator mapping using diagnostic methods facilitates deep inferior epigastric perforator (DIEP) flap planning. Computed tomographic angiography (CTA) is a well-proven tool for perforator mapping. However, the benefits of color Doppler ultrasonography (CDU) are as follows: 1) CDU involves dynamic real-time examination and 2) does not use radiation. Comparing the accuracies of both methods in a cohort of patients, this study aimed to evaluate the learning curve of surgeon-conducted CDU perforator mapping. METHODS:Twenty patients undergoing DIEP flap breast reconstruction were enrolled in a cohort study. All patients underwent CTA perforator mapping preoperatively. XY coordinates of significant perforators were subtracted by a radiologist. A single surgeon (sonographer) with minimal experience with CDU performed CDU perforator mapping, including XY coordinates subtraction. The sonographer was blinded to the CTA data. The reference coordinates of dissected perforators were measured during surgery. Deviations from reference coordinates for both methods were compared, and CDU mapping learning curve was assessed using Joinpoint Regression. RESULTS:We included 20 women (32 DIEP flaps and 59 dissected perforators). The mean deviation between mapped and reference coordinates was 1.00 (0.50-1.12) cm for CDU and 0.71 (0.50-1.12) cm for CTA. The learning curve of CDU mapping showed the breaking point after the seventh patient (≈ 21 localized perforators). After the breaking point, no significant differences between the deviations of both methods were found (p = 0.980). CONCLUSION:A limited number of examinations were needed for the surgeon to learn CDU DIEA perforator mapping with accuracy similar to that of CTA mapping.

Background The progenitors to lung airway epithelium that are capable of long-term propagation may represent an attractive source of cells for cell-based therapies, disease modeling, toxicity testing, and others. Principally, there are two main options for obtaining lung epithelial progenitors: (i) direct isolation of endogenous progenitors from human lungs and (ii) in vitro differentiation from some other cell type. The prime candidates for the second approach are pluripotent stem cells, which may provide autologous and/or allogeneic cell resource in clinically relevant quality and quantity. Methods By exploiting the differentiation potential of human embryonic stem cells (hESC), here we derived expandable lung epithelium (ELEP) and established culture conditions for their long-term propagation (more than 6 months) in a monolayer culture without a need of 3D culture conditions and/or cell sorting steps, which minimizes potential variability of the outcome. Results These hESC-derived ELEP express NK2 Homeobox 1 (NKX2.1), a marker of early lung epithelial lineage, display properties of cells in early stages of surfactant production and are able to differentiate to cells exhibitting molecular and morphological characteristics of both respiratory epithelium of airway and alveolar regions. Conclusion Expandable lung epithelium thus offer a stable, convenient, easily scalable and high-yielding cell source for applications in biomedicine.

The authors present a technique of bilateral breast reconstruction in case series of 5 patients, allowing simultaneous harvest of both latissimus dorsi myocutaneous flaps. Three patients underwent bilateral immediate reconstruction after prophylactic mastectomy. One patient underwent a delayed reconstruction, in 1 patient latissimus dorsi myocutaneous flap was used after prophylactic mastectomy and reconstruction with implants followed by bilateral necrosis of the skin flaps. The described technique enables safe breast reconstruction in one procedure. The average reconstruction time was about 4 hours, which represents bilateral latissimus dorsi procedure to the centre of the breast reconstructions range, between the reconstructions with double free tissue transfer and the breast implants.

BACKGROUND:Reconstruction of upper and lower extremity defects can be challenging. Especially in distal parts, relatively thin flaps are needed not to interfere with the function or aesthetic appearance of the extremity. The superficial circumflex iliac artery perforator (SCIP) flap represents a powerful but still not so commonly used tool for this kind of reconstruction. In this article, we present several cases of the use of the SCIP flap for extremity defect coverage.CASE SERIES:We present five cases (three men and two women) of upper or lower extremities defect coverage with a SCIP flap performed between January and June 2021 at our department. The mean age of the patients was 43 years (28-67 years). The body mass index was 28.6 on average. Two defects were located on hands and three defects on lower extremities. In three cases, the cause of the defect was trauma, and in the remaining two, it was a tumor resection. The mean thickness of the flap was 9.4 mm. We experienced no total flap loss and no revision surgery for ischemia or congestion was needed. One of the patients developed marginal flap necrosis, which was corrected by necrectomy and direct skin closure.CONCLUSION:Our case series demonstrates the possible use of the SCIP flap in the reconstruction of upper and lower extremities. With its thinness, low donor-site morbidity, and ease of harvest, we recommend the SCIP flap to be considered as one of the primary reconstructive options for various extremities defects.

MicroRNAs (miRNAs), a class of small, noncoding RNA molecules represent important regulators of gene expression. Recent reports have implicated their role in the cell specification process acting as "fine-tuners" to ensure the precise gene expression at the specific stage of cell differentiation. Here, we used retinal organoids differentiated from human pluripotent stem cells (hPSCs) as a model to closely investigate the role of a sensory organ-specific and evolutionary conserved miR-183/96/182 cluster. Using a miRNA tough decoy approach, we inhibited the miR-183/96/182 cluster in hPSCs. Inhibition of the miRNA cluster resulted in an increased expansion of neuroepithelium leading to abnormal "bulged" neural retina in organoids, associated with upregulation of neural-specific and retinal-specific genes. Importantly, we identifiedPAX6, a well-known essential gene in neuroectoderm specification, as a target of the miR-183/96/182 cluster members. Taken together, the miR-183/96/182 cluster not only represents an important regulator ofPAX6expression, but it also plays a crucial role in retinal tissue morphogenesis.

INTRODUCTIONThe bilobed flap was first described by Esser in 1918. He used it to reconstruct the defects of the nose. It has been used in the reconstructions of trunk and feet defects by many authors since then. Its principle is also advantageous in reconstructions of larger facial defects. Successful reconstruction of problematic suborbital area using the bilobed flap was reported by Yenidunya in 2007. The design of the flap can be successfully used in other atypical facial defects.MATERIAL AND METHODSThe bilobed flap was used to cover facial defects of 199 patients who underwent 203 tissue reconstructions from 1st January 2007 to 31st December 2016 at the Department of Plastic and Aesthetic Surgery St. Anne´s University Hospital in Brno.RESULTSThe flaps were equally distributed between the genders, men 101 and women 98. Ages of patients ranged from 39 to 98 years (mean 76 years). It was used in the reconstruction of the tip and alars defects of the nose 159 times, in the reconstruction of periorbital defects 16 times and in other atypical facial areas 28 times. The excision of malignant tumours of the face (basal cell carcinoma, squamous cell carcinoma, SSM) were usually the causes of the defects (89.7%). There were 80 cases with defects of the nasal tip and ala in men and 79 cases in women. Complications occurred 41 times of all reconstructions (20.2%). The most common complication was abundance of the flap (4.9%). The postoperative results were favourable due to the preservation of colour, texture and function of the reconstructed areas.CONCLUSIONBilobed flap in different modifications should always be considered in the reconstruction of extensive defects of the face, because unlike other techniques, it preserves good texture and colour of facial skin with minimal donor site morbidity.