OBJECTIVES: To establish a three-dimensional (3D) visualization-based classification of the left hepatic portal vein (LHPV) and left hepatic vein (LHV) systems using 3D reconstruction technology to facilitate precise segmental/subsegmental resection of left liver lesions. METHODS: Thin-slice contrast-enhanced CT datasets from 244 patients were reconstructed using MI-3DV Works software. The spatial anatomy (origins, branching patterns, and spatial relationships) of the LHPV and LHV branches was analyzed to determine their 3D classifications and segmental liver divisions for guiding surgical planning for anatomical left liver resections. RESULTS: The 3D models of the third- and fourth-order branches of the LHPV and LHV were successfully reconstructed for all the 244 patients. Two types of the LHPV system were identified, where the LHPV either had independent origins [242 cases (99.1%)] or had right anterior portal branches arising from the LHPV trunk [2 cases (0.9%)]. 3D classifications identified two types of the Segment II of the LHPV (based on branch number), 3 types of the Segment III (by spatial distribution of the branches), compact vs dispersed types of the left lateral lobe (determined by Segment II/III branches proximity), 3 types of the Segment IV (by branch number and origin), and 3 types the fourth hilar vessels (transverse branches of the left portal vein) for their supplied segments. The LHV system had two drainage types into the inferior vena cava, and the umbilical fissure veins were classified into 3 types by drainage patterns and distance to the venous roots. These classifications combined with liver segmentations allowed individualized surgical planning for segment-specific resections. CONCLUSIONS The 3D classification of the LHPV and LHV provides valuable clinical guidance for precise anatomical resections of left liver lesions using liver segments or subsegments as anatomical units to enhance surgical accuracy and improve the outcomes of hepatobiliary surgery.
Humans ; Hepatectomy/methods* ; Imaging, Three-Dimensional ; Hepatic Veins/anatomy & histology* ; Portal Vein/anatomy & histology* ; Liver/surgery* ; Liver Neoplasms/blood supply* ; Tomography, X-Ray Computed ; Female

Radiochemotherapy-induced oral mucositis (OM) is a common oral complication in patients with tumors following head and neck radiotherapy or chemotherapy. Erosion and ulcers are the main features of OM that seriously affect the quality of life of patients and even the progress of tumor treatment. To date, differences in clinical prevention and treatment plans for OM have been noted among doctors of various specialties, which has increased the uncertainty of treatment effects. On the basis of current research evidence, this expert consensus outlines risk factors, clinical manifestations, clinical grading, ancillary examinations, diagnostic basis, prevention and treatment strategies and efficacy indicators for OM. In addition to strategies such as basic oral care, anti-inflammatory and analgesic agents, anti-infective agents, pro-healing agents, and photobiotherapy recommended in previous guidelines, we also emphasize the role of traditional Chinese medicine in OM prevention and treatment. This expert consensus aims to provide references and guidance for dental physicians and oncologists in formulating strategies for OM prevention, diagnosis, and treatment, standardizing clinical practice, reducing OM occurrence, promoting healing, and improving the quality of life of patients.
Humans ; Chemoradiotherapy/adverse effects* ; Consensus ; Risk Factors ; Stomatitis/etiology*

Objective To investigate the prevalence of Cryptosporidium infection and the distribution of parasite species and genotypes among HIV-positive individuals in Jiangxi Province. Methods HIV-positive individuals' sociodemographic and clinical data were collected from three AIDS designated hospitals in Jiangxi Province from January 2022 to March 2023. Subjects' stool samples were collected, and genomic DNA was extracted from stool samples. Nested PCR assay was performed based on the small subunit ribosomal RNA (SSU rRNA) gene of Cryptosporidium, and Cryptosporidium gp60 gene was amplified in stool samples positive for the SSU rRNA gene. The second-round PCR amplification product was checked with 1.5% agarose gel electrophoresis, and the products of suspected positive amplifications were sequenced, followed by sequence alignment. The phylogenetic tree was created using the Neighbor-Joining method with the software MEGA 11.0, to characterize the species, genotypes and sub-genotypes of Cryptosporidium. Results A total of 382 HIV-positive individuals were enrolled, with two cases identified with Cryptosporidium infection (0.52% prevalence), and both cases had no abdominal pain or diarrhea. Following sequencing and sequence alignment, the gene sequences of these two Cryptosporidium isolates shared 99.76% and 99.88% similarity with the gene sequence of C. meleagridis isolates. Phylogenetic analysis based on the Cryptosporidium SSU rRNA gene sequence identified the species of these two Cryptosporidium-positive stool samples as C. meleagridis. Following nested PCR amplification of the Cryptosporidium gp60 gene, sequencing and sequence alignment, the two C. meleagridis isolates were characterized as III eA17G2R1 and III bA25G1R1a sub-genotypes, and the sub-genotype III bA25G1R1a was firstly described in humans. Conclusion The prevalence of Cryptosporidium is low among HIV-positive individuals in Jiangxi Province. The likelihood of Cryptosporidium infection cannot be neglected among HIV-positive individuals without diarrhea.

Due to the low contrast of CT images,irregular shape of the liver,and blurred boundaries with adjacent organs,the existing methods based on convolutional neural network underperform in liver segmentation tasks,especially for boundary recognition and small object detection.A novel liver segmentation method is proposed based on multi-scale feature fusion and attention,namely MFFA UNet.Multi-scale feature fusion is firstly employed to acquire abundant segmentation details,while spatial and channel attention mechanisms are utilized to capture global spatial and inter-channel relationships.Additionally,a deep supervision module fully leverages the output of intermediate hidden layers,enhancing the learning capability of the network,which in turn accelerates the network's convergence speed.Moreover,a hybrid loss function is adopted to address the issue of class imbalance,further boosting the model's segmentation efficacy.Experimental results demonstrate that the proposed MFFA UNet outperforms the prevailing segmentation networks on the public LITS dataset,producing results that are closer to the ground truth.

Objective:The pain-relieving effect and safety of compound aminopyrine phenacetin tab-lets,tramcontin(tramadol hydrochloride sustained-release tablets)and dolantin in the early stage of au-tologous tendon reconstruction of the anterior cruciate ligament(ACL)of the knee joint were compared.Methods:Retrospective analysis of postoperative pain and drug analgesia in 45 patients performed by the same group from November 2018 to February 2019.The random area group design was divided into two groups according to whether ACL rupture was combined with meniscal injury,group A was 24 patients with ACL reconstruction of knee joint and group B was 21 patients with ACL fracture combined with me-niscus injury.The two groups were divided into three subgroups respectively according to the actual treat-ment of postoperative analgesic drugs received by the patients,including 4 cases of compound aminopy-rine phenacetin tablets,11 cases of oral tramcontin,9 cases of intramuscular dolantin combined with phenergan in group A;3 cases of compound aminopyrine phenacetin tablets,10 cases of oral tramcontin,and 8 cases of intramuscular dolantin combined with phenergan in group B.When the early postoperative patients complain about pain and actively ask for analgesia.When the patients complained about pain af-ter the operation and actively asked for analgesia,they were randomly given painkillers,tramcontin or do-lantin combined with phenergan to relieve pain.Pain visual analogue scale(VAS)was used to evaluate pain relief and observe the occurrence of adverse reactions.Results:There were no significant dif-ferences in gender,age,body mass index,and time of hospital stay between the two groups of patients(P＞0.05).In the patients who used tramcontin and dolantin combined with phenergan to relieve pain judging by VAS score before and 1 h after taking the drug,it was found that the pain situation of the pa-tient was significantly relieved,and the difference before and after taking the drug had statistical signifi-cance(P＜0.05).Pairwise comparisons of the three drugs applied in the two groups showed significantly greater pain relief in the dolantin combined with phenergan group than in the remaining two drugs.There was no significant difference(P＞0.05).Dolantin was prone to nausea and vomiting,but the application of phenergan was also used to reduce side effects.In terms of adverse reactions,only 1 case of nausea oc-curred in the tramcontin group for simple ACL reconstruction,and none of the patients in the other groups showed serious complications and allergic reactions.Conclusion:Whether in cruciate ligament recon-struction alone or combined with meniscus molding or suture,compound aminopyrine phenacetin tablets,tramcontin,dolantin combined with phenergan can effectively relieve pain.Among the three drugs,do-lantin caused the largest pain relief.At the same time,the combination of phenergan effectively reduced the adverse reactions,such as vomiting and nausea,and increased the drug safety.

Background::Visual inputs are critical for locomotor navigation and sensorimotor integration in the elderly; however, the mechanism needs to be explored intensively. The present study assessed the gait pattern after cataract surgery to investigate the effects of visual restoration on locomotion.Methods::The prospective study recruited 32 patients (70.1 ± 5.2 years) with bilateral age-related cataracts in the Department of Ophthalmology at Peking University Third Hospital from October 2016 to December 2019. The temporal-spatial gait parameters and kinematic parameters were measured by the Footscan system and inertial measurement units. Paired t-test was employed to compare data normally distributed and Wilcoxon rank-sum test for non-normally distributed. Results::After visual restoration, the walking speed increased by 9.3% (1.19 ± 0.40 m/s vs. 1.09 ± 0.34 m/s, P=0.008) and exhibited an efficient gait pattern with significant decrease in gait cycle (1.02 ± 0.08 s vs. 1.04 ± 0.07 s, P=0.012), stance time (0.66 ± 0.06 s vs. 0.68 ± 0.06 s, P=0.045), and single support time (0.36 ± 0.03 s vs. 0.37 ± 0.02 s, P=0.011). High amplitude of joint motion was detected in the sagittal plane in the left hip (37.6° ± 5.3° vs. 35.5° ± 6.2°, P=0.014), left thigh (38.0° ± 5.2° vs. 36.4° ± 5.8°, P=0.026), left shank (71.9° ± 5.7° vs. 70.1° ± 5.6°, P=0.031), and right knee (59.1° ± 4.8° vs. 56.4° ± 4.8°, P=0.001). The motor symmetry of thigh improved from 8.35 ± 5.30% to 6.30 ± 4.73% ( P=0.042). Conclusions::The accelerated gait in response to visual restoration is characterized by decreased stance time and increased range of joint motion. Training programs for improving muscle strength of lower extremities might be helpful to facilitate the adaptation to these changes in gait.

Objective:To explore the value of apparent diffusion coefficient (ADC) and renal volume in assessing fetal kidney development and disease.Methods:From January 2016 to October 2020, 84 fetuses with congenital anomalies of the kidney and urinary tract (CAKUT) were identified with MRI (CAKUT group), and 97 fetuses with no significant abnormalities on MRI or postnatal follow-up (control group) from the Obstetrics and Gynecology Hospital of Fudan University were enrolled and analyzed retrospectively. ADC value and renal volume were measured to compare the two groups, and the relationship was analyzed between these two parameters in the control group with gestational age, location (left or right kidney), and fetal gender. Two independent or paired sample t-tests, and linear correlation analyses, were adopted for the statistical analysis. Results:(1) There were 84 pregnant women in the CAKUT group, including a twin pregnancy, with an average age of (29±4) years old, ranging from 21 to 39 years old. The gestational age at MRI was (26±4) weeks with a range of 21-34 weeks. Of the 85 fetuses, 52 were male (61.2%), and 33 were female (38.8%). The polycystic dysplastic kidney was found in 32 cases (37.6%), hydronephrosis in 29 cases (34.1%), and an isolated kidney in 24 cases (28.2%). There were 97 singleton pregnancies in the control group, including 45 (46.4%) male and 52 (53.6%) female fetuses. The average maternal age was (30±5) years old, with a range of 19-41 years old, and the gestational week at MRI was (27±4) weeks, with a range of 21-34 weeks. (2) In the control group, the mean ADC value and renal volume were (1.255±0.112)×10 －3 mm2/s and (4 747±2 479) mm 3, which were negatively ( R 2=0.30, P<0.01) and positively correlated ( R 2=0.80, P<0.01) with the gestational age, respectively. There was no significant difference between ADC value and renal volume between different fetal gender in the control group. (3) The ADC value and the renal volume of fetuses with polycystic dysplastic kidney [(1.720±0.200) ×10 －3 mm2/s and (8 154±8 337) mm 3] were higher than those in the control group ( t=－13.11 and－3.08, P<0.001 and P=0.004). Compared with the control group, ADC of fetuses with hydronephrosis [(1.333±0.171) ×10 －3 mm2/s] was higher ( t=－3.90, P<0.001); and the renal volume [(7 201±4 460) mm 3] was larger but without statistical significance. The fetuses with an isolated kidney had an increasing trend in renal volume [(5 239±4 244) mm 3] and a decreasing trend in the ADC value [(1.239±0.125) ×10 －3 mm2/s] when compared with the normal fetuses, but neither difference was significant. Conclusions:In normal fetuses, the ADC value decreases, and the renal volume increases with the gestational age. Fetuses with CAKUT may have a larger kidney than normal.

The complexity of oral ulcerations poses considerable diagnostic and therapeutic challenges to oral specialists. The expert consensus was conducted to summarize the diagnostic work-up for difficult and complicated oral ulcers, based on factors such as detailed clinical medical history inquiry, histopathological examination, and ulceration-related systemic diseases screening. Not only it can provide a standardized procedure of oral ulceration, but also it can improve the diagnostic efficiency, in order to avoid misdiagnosis and missed diagnosis.
Consensus ; Humans ; Oral Ulcer/therapy*

In the era of Internet +, teaching models in universities are undergoing changes due to the rapid development of information technology. Blended teaching, combining online with offline teaching, is being implemented and developed in universities. In order to reform teaching mode and improve teaching effect, the curriculum team carried out the exploration of blended teaching reform for the "Introduction to Life Sciences" for non-biology students. The course combined high-level MOOC (Massive Open Online Course), small class teaching, diversified platform and multi-dimensional teaching mode, built a multi-disciplinary collaborative teaching team, formed a multi-dimensional evaluation system focusing on process and ability, practiced the education concept of combining knowledge teaching and value leading, gained valuable practical experience, and achieved the expected teaching results. It can provide reference for the reform and construction of similar courses in other colleges and universities. The development of blended teaching expands the breadth and depth of teaching, stimulates students' interest and potential for learning, opens up students' thinking and perspective, cultivates students' scientific literacy and comprehensive ability, and plays a positive role in the cultivation of innovative and inter-disciplinary talents.
Biological Science Disciplines ; Curriculum ; Humans ; Learning ; Students ; Universities

Management of bone defects caused by fractures，bone tumors or infections is clinically difficult as well as a hot topic in current studies. With further researches over bone defects，the construction of tissue-engineered bone has played a great role in the treatment of bone defects. Blood vessels not only provide the necessary nutritional mineral salts，growth factors，hormones for bone formation，also are able to mediate the interaction among osteoblasts and osteoclasts，osteocytes，bone autonomic nerve and endothelial cells，since bone formation exist spatially and temporally connection with angiogenesis. Therefore，the authors make a systematic literature review on the research progress of the coupling mechanism of angiogenesis and osteogenic differentiation，blood vessels and related signal pathways on osteogenic differentiation and angiogenesis-related molecules in osteogenic differentiation during the process of traumatic bone defects，so as to provide new ideas for the treatment of bone defects.