Objective:To examine the feasibility and clinical effect of all-inside endoscopic procedure through two portals combined with double-hemisection Achilles tendon lengthening for Achilles tendon contracture.Methods:This is a retrospective case series study. From February 2021 to February 2023, the clinical data of 24 patients (30 feet) with Achilles tendon contracture treated with all-inside endoscopic procedure through two portals combined with double-hemisection Achilles tendon lengthening were analyzed retrospectively. There were 10 males and 14 females, aged (32.8±16.1) years (range: 9 to 62 years). There were 8 cases of left side only, 10 cases of right side only and 6 cases of bilateral. There were 14 cases (16 feet) of foot varus, 4 cases (6 feet) of foot valgus, and 6 cases (8 feet) without deformity. All patients underwent all-inside endoscopic procedure through two portals combined with double-hemisection Achilles tendon lengthening. The surgical effects were evaluated using the maximum dorsal extension angle of ankle joint in knee extension position, the visual analogue scale (VAS) of pain, the American Orthopedic Foot and Ankle Society ankle-hindfoot score(AOFAS-AH). Paired sample t test was used to compare the scores before and after operation.Results:All patients successfully completed the operation, and the operation time of Achilles tendon lengthening was (22.0±5.7)minutes (range: 15 to 35 minutes) and the intraoperative blood loss was (6.5±2.7)ml (range: 2 to 15 ml). All patients primarily healing without any complications such as sural nerve injury, Achilles tendon rupture, important blood vessel injury, and obvious decrease of lift heel strength of achilles tendon. All 24 patients were followed up for (17.2±4.5) months (range: 12 to 28 months). One patient suffered from lift heel′s weakness in one foot after operation, and recovered after repeated lift heel functional exercises. The ankle dorsiflexion function of two patients with calf triceps spasm were not improved after operation, and it was obviously improved after botulinum toxin injection. At the last follow-up, the maximum dorsal extension angle of ankle joint in knee extension position increased from -9.2°±7.6°(range:-25° to 5°) preoperatively to 14.5°±7.0°(range:0° to 28°)( t=24.83, P<0.01); the VAS score was reduced from (4.5±1.7) points (range:1 to 8 points) preoperatively to (1.5±0.9) points (range:0 to 3 points) ( t=9.53, P<0.01), the AOFAS-AH was increased from (60.5±11.4)points (range:38 to 85 points) to (90.8±5.4) points (range:80-100 points)( t=14.21, P<0.01). Conclusions:All-inside endoscopic procedure through two portals combined with double-hemisection Achilles tendon lengthening for Achilles tendon contracture not only provides Achilles tendon lengthening, but also avoids complications such as Achilles tendon rupture and sural nerve injury. It is an effective method for the treatment of Achilles tendon contracture.

Objective:To explore the genetic basis of a child with mental retardation and developmental delay.Methods:A child who had attended the genetic clinic of Linyi People′s Hospital from October 2023 to April 2024 was selected as the study subject. Intelligence and development were assessed with simplified Peabody scale. Electroencephalogram and imaging data were collected. Peripheral blood samples of the child and her parents were collected for the screening of genetic metabolic diseases, chromosomal karyotyping, and trio-whole genome sequencing (trio-WGS) analysis. Candidate variant was verified by Sanger sequencing, and RNAseq was carried out to verify the alternative splicing due to the candidate variant. This study has been approved by the Medical Ethics Committee of Linyi People′s Hospital (No. YX200083).Results:The patient was an 8-year-and-11-month-old girl. Both of her parents had normal phenotypes. The child was assessed by the simplified Peabody scale as having intellectual disability and developmental delay. MRI showed no definite abnormal signals within the brain parenchyma, and electroencephalogram was normal. Screening of genetic metabolic diseases showed no obvious abnormality. Chromosomal karyotype was normal. Trio-WGS has detected a c. 697+ 1G>A variant in the intron 4 of the NFIX gene, along with 9 other variants within eight genes. The c. 697+ 1G>A variant may cause abnormal splicing of the NFIX gene transcript. Based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), the c. 697+ 1G>A variant was predicted to be pathogenic (PVS1+ PS2+ PM2_Supporting), while the evidence for pathogenicity of the other 9 variants was insufficient. Conclusion:The novel de novo c. 697+ 1G>A variant of the NFIX gene probably underlay the pathogenesis of the child, which may have caused the disease by leading to abnormal splicing.

Objective:To examine the feasibility and clinical effect of all-inside endoscopic procedure through two portals combined with double-hemisection Achilles tendon lengthening for Achilles tendon contracture.Methods:This is a retrospective case series study. From February 2021 to February 2023, the clinical data of 24 patients (30 feet) with Achilles tendon contracture treated with all-inside endoscopic procedure through two portals combined with double-hemisection Achilles tendon lengthening were analyzed retrospectively. There were 10 males and 14 females, aged (32.8±16.1) years (range: 9 to 62 years). There were 8 cases of left side only, 10 cases of right side only and 6 cases of bilateral. There were 14 cases (16 feet) of foot varus, 4 cases (6 feet) of foot valgus, and 6 cases (8 feet) without deformity. All patients underwent all-inside endoscopic procedure through two portals combined with double-hemisection Achilles tendon lengthening. The surgical effects were evaluated using the maximum dorsal extension angle of ankle joint in knee extension position, the visual analogue scale (VAS) of pain, the American Orthopedic Foot and Ankle Society ankle-hindfoot score(AOFAS-AH). Paired sample t test was used to compare the scores before and after operation.Results:All patients successfully completed the operation, and the operation time of Achilles tendon lengthening was (22.0±5.7)minutes (range: 15 to 35 minutes) and the intraoperative blood loss was (6.5±2.7)ml (range: 2 to 15 ml). All patients primarily healing without any complications such as sural nerve injury, Achilles tendon rupture, important blood vessel injury, and obvious decrease of lift heel strength of achilles tendon. All 24 patients were followed up for (17.2±4.5) months (range: 12 to 28 months). One patient suffered from lift heel′s weakness in one foot after operation, and recovered after repeated lift heel functional exercises. The ankle dorsiflexion function of two patients with calf triceps spasm were not improved after operation, and it was obviously improved after botulinum toxin injection. At the last follow-up, the maximum dorsal extension angle of ankle joint in knee extension position increased from -9.2°±7.6°(range:-25° to 5°) preoperatively to 14.5°±7.0°(range:0° to 28°)( t=24.83, P<0.01); the VAS score was reduced from (4.5±1.7) points (range:1 to 8 points) preoperatively to (1.5±0.9) points (range:0 to 3 points) ( t=9.53, P<0.01), the AOFAS-AH was increased from (60.5±11.4)points (range:38 to 85 points) to (90.8±5.4) points (range:80-100 points)( t=14.21, P<0.01). Conclusions:All-inside endoscopic procedure through two portals combined with double-hemisection Achilles tendon lengthening for Achilles tendon contracture not only provides Achilles tendon lengthening, but also avoids complications such as Achilles tendon rupture and sural nerve injury. It is an effective method for the treatment of Achilles tendon contracture.

The 18th National Postgraduate Symposium on Environmental and Occupational Medicine, co-sponsored by the Editorial Board of Journal of Environmental and Occupational Medicine and the School of Public Health of Sun Yat-sen University, was successfully held on August 22 to 25, 2024 in Guangzhou, Guangdong Province, China. Adhering to the theme of “Research and practice: Healing the schism”, the symposium aims to enliven academic thinking, expand research horizons, encourage innovation, enhance inter-university exchanges, and strengthen talent cultivation, especially to promote the close integration of academic research and public health practice. A total of 105 papers were received from 38 universities. The symposium also gathered about 160 participants, mainly authors postgraduates from universities and experts and professors in the field of environmental and occupational medicine. All the participants discussed the latest research advances and future development trends of environmental and occupational medicine, and endeavor to apply the research results in public health practice.

AIM: To explore the clinical features, diagnosis and treatment experience and the distribution characteristics of pathogenic microorganisms of primary canaliculitis, and provide reference for its diagnosis and treatment. METHODS: Retrospective clinical study. A total of 119 cases(120 eyes)diagnosed as primary canaliculitis in the department of ophthalmology of Wuxi No.2 People's Hospital from June 2019 to February 2023 were included. The treatment methods were mainly divided into conservative treatment(removing canaliculus stones through lacrimal punctum combined with injecting antibiotic eye ointment into the tube)and surgical treatment. The inspection methods of pathogenic microorganisms included secretion smear microscopy and microbial culture.RESULTS: Primary canaliculitis was more common in middle-aged and older female, mainly manifested by long-term red eye and increased secretion; however, the majority was not accompanied by tearing. Totally, 118 cases(99.2%)had monocular disease, while 63 cases(63 eyes; 52.5%)had inferior lacrimal canaliculus disease. Laboratory examination: Among 119 cases(120 eyes), 4 cases(4 eyes)did not undergo laboratory examination, and the other 115 cases(116 eyes)were as follows: Gram staining microscopy of secretion smear showed that Actinomyces were detected in 102 cases(103 eyes; 88.8%), while no fungus was detected; Microbial culture: 85 cases(86 eyes; 74.1%)were positive for bacterial culture. A total of 111 bacterial strains were cultured, which contained 26 types of bacteria. Among them, 32 strains were aerobic(28.8%); 26 strains were anaerobic(23.4%); and 53 strains were facultative anaerobic(47.7%). The most common bacteria were streptococcus(20 strains), staphylococcus(13 strains), Propionibacterium(10 strains), and capnocytophaga(10 strains). Only 4 cases(4 eyes; 3.4%)of microbial cultures were positive for Actinomyces. Fungus was negative in all microbial cultures. Treatment: Of the 119 cases(120 eyes), 114 cases(115 eyes; 95.8%)were cured by conservative treatment of removing lacrimal canaliculus stones through lacrimal punctum and intracanalicular ointment infiltration(IOI), while 5 cases(5 eyes)were not effective in conservative treatment; however, all of them were cured after surgical treatment, and the cure rate for primary canaliculitis was 100.0%.CONCLUSION: The incidence of primary canaliculitis is low, and it is prevalent in middle-aged and older female. Single lacrimal canaliculus is more common, which could be missed and misdiagnosed in clinic. Actinomyces is the major pathogen observed mostly in mixed infections, with heterogeneous strains, mainly anaerobic or facultative anaerobic bacteria. Streptococcus and Staphylococcus are the most common whereas fungal canaliculitis is rare. The cure rate of primary canaliculitis is high after diagnosis, and IOI method is recommended as the initial treatment of canaliculitis.

Objective:To investigate the functional outcomes of posterior arthroscopic subtalar arthrodesis (PASTA) for adult patients presenting with symptomatic talocalcaneal coalition.Methods:The study was a retrospective case-series research.The data of 17 adult patients (17 feet) with symptomatic talocalcaneal coalitions,treated with PASTA from March 2018 to February 2022 in Xuzhou Central Hospital were collected.This procedure involved 10 males and 7 females,aged (42.4±7.5) years(range:31 to 58 years).There were 9 cases on the right side and 7 cases on the left side.According to the Rozansky classification,there were 4 cases of type Ⅰ,7 cases of type Ⅱ, 3 cases of type Ⅲ,3 cases of type Ⅳ.The following items such as wound healing and bony union of the subtalar joint were observed.Clinical assessment was performed using pain visual analogue scale (VAS),American Orthopaedic Foot & Ankle Society (AOFAS) ankle-hindfoot scores and 36-item short form health survey (SF-36) scores.The paired t test was used for data comparison. Results:The follow-up time was (24.8±6.9) months(range:12 to 40 months).There were no complications such as wound infection,deep vein thrombosis,nonunion,or screw breakage.One patient with preoperative spasm,relieved after the second surgical procedure (peroneal brevis tendon lengthening).The union time of the subtalar joint was (8.8±2.2) weeks(range:6 to 12 weeks).At the final follow-up,the VAS decreased from 6.4±1.3 to 1.3±0.9 ( t=14.114, P<0.01), the AOFAS ankle-hindfoot score increased from 49.0±8.1 to 90.0±5.1 ( t=38.782, P<0.01),and the SF-36 score increased from 50.8±9.5 to 91.0±4.9 ( t=20.468, P<0.01). Conclusion:PASTA for adult patients presenting with symptomatic talocalcaneal coalition offers advantages of minimal trauma,fast recovery,and few complications,which is an effective method.

BACKGROUND: Congenital scoliosis (CS) is a complex spinal malformation of unknown etiology with abnormal bone metabolism. Fibroblast growth factor 23 (FGF23), secreted by osteoblasts and osteocytes, can inhibit bone formation and mineralization. This research aims to investigate the relationship between CS and FGF23. METHODS: We collected peripheral blood from two pairs of identical twins for methylation sequencing of the target region. FGF23 mRNA levels in the peripheral blood of CS patients and age-matched controls were measured. Receiver operator characteristic (ROC) curve analyses were conducted to evaluate the specificity and sensitivity of FGF23. The expression levels of FGF23 and its downstream factors fibroblast growth factor receptor 3 (FGFr3)/tissue non-specific alkaline phosphatase (TNAP)/osteopontin (OPN) in primary osteoblasts from CS patients (CS-Ob) and controls (CT-Ob) were detected. In addition, the osteogenic abilities of FGF23-knockdown or FGF23-overexpressing Ob were examined. RESULTS: DNA methylation of the FGF23 gene in CS patients was decreased compared to that of their identical twins, accompanied by increased mRNA levels. CS patients had increased peripheral blood FGF23 mRNA levels and decreased computed tomography (CT) values compared with controls. The FGF23 mRNA levels were negatively correlated with the CT value of the spine, and ROCs of FGF23 mRNA levels showed high sensitivity and specificity for CS. Additionally, significantly increased levels of FGF23, FGFr3, OPN, impaired osteogenic mineralization and lower TNAP levels were observed in CS-Ob. Moreover, FGF23 overexpression in CT-Ob increased FGFr3 and OPN levels and decreased TNAP levels, while FGF23 knockdown induced downregulation of FGFr3 and OPN but upregulation of TNAP in CS-Ob. Mineralization of CS-Ob was rescued after FGF23 knockdown. CONCLUSIONS Our results suggested increased peripheral blood FGF23 levels, decreased bone mineral density in CS patients, and a good predictive ability of CS by peripheral blood FGF23 levels. FGF23 may contribute to osteopenia in CS patients through FGFr3/TNAP / OPN pathway.
Humans ; Osteopontin/genetics* ; Alkaline Phosphatase/metabolism* ; Receptor, Fibroblast Growth Factor, Type 3/metabolism* ; Scoliosis/genetics* ; Osteoblasts/metabolism* ; Calcinosis ; RNA, Messenger/metabolism* ; Bone Diseases, Metabolic/metabolism* ; Fibroblast Growth Factors/genetics*

Objective:To investigate the functional outcomes of posterior arthroscopic subtalar arthrodesis (PASTA) for adult patients presenting with symptomatic talocalcaneal coalition.Methods:The study was a retrospective case-series research.The data of 17 adult patients (17 feet) with symptomatic talocalcaneal coalitions,treated with PASTA from March 2018 to February 2022 in Xuzhou Central Hospital were collected.This procedure involved 10 males and 7 females,aged (42.4±7.5) years(range:31 to 58 years).There were 9 cases on the right side and 7 cases on the left side.According to the Rozansky classification,there were 4 cases of type Ⅰ,7 cases of type Ⅱ, 3 cases of type Ⅲ,3 cases of type Ⅳ.The following items such as wound healing and bony union of the subtalar joint were observed.Clinical assessment was performed using pain visual analogue scale (VAS),American Orthopaedic Foot & Ankle Society (AOFAS) ankle-hindfoot scores and 36-item short form health survey (SF-36) scores.The paired t test was used for data comparison. Results:The follow-up time was (24.8±6.9) months(range:12 to 40 months).There were no complications such as wound infection,deep vein thrombosis,nonunion,or screw breakage.One patient with preoperative spasm,relieved after the second surgical procedure (peroneal brevis tendon lengthening).The union time of the subtalar joint was (8.8±2.2) weeks(range:6 to 12 weeks).At the final follow-up,the VAS decreased from 6.4±1.3 to 1.3±0.9 ( t=14.114, P<0.01), the AOFAS ankle-hindfoot score increased from 49.0±8.1 to 90.0±5.1 ( t=38.782, P<0.01),and the SF-36 score increased from 50.8±9.5 to 91.0±4.9 ( t=20.468, P<0.01). Conclusion:PASTA for adult patients presenting with symptomatic talocalcaneal coalition offers advantages of minimal trauma,fast recovery,and few complications,which is an effective method.

Objective:To investigate the efficacy of total ankle arthroscopy for resection of the talus os trigonum and debridement of the synovium of flexor hallucis longus (FHL) in the treatment of osteogenic posterior ankle impingement syndrome (PAIS) complicated with flexor hallucis longus tenosynovitis (FHLT).Methods:The 14 patients with osteogenic PAIS and FHLT were retrospectively analyzed who had been treated at Department of Hand-Foot-Ankle Microsurgery, Xuzhou Central Hospital from July 2017 to July 2019. They were 8 men and 6 women, aged from 29 to 53 years (mean, 42.4 years). The talus os trigonum and the giant posterolateral process of the talus were resected under total ankle arthroscopy in the prone position of the posterior ankle while the FHL was released and cleared. The efficacy was evaluated by comparing the American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score, Maryland functional score, and pain visual analog scale (VAS) between preoperation and one year postoperation.Results:All patients were followed up for 12 to 24 months (average, 15 months). For all patients, their plantar flexion and dorsal extension were improved significantly from preoperative 19.2°±4.0° and 14.2°±2.7° to postoperative 42.9°±2.7° and 24.5°±3.2°, their AOFAS score increased significantly from preoperative 42.1±4.2 to 91.6±2.7 at one year postoperation, their Maryland score increased significantly from preoperative 43.9±4.1 to 91.9±3.5 at one year postoperation, and their VAS score decreased significantly from preoperative 6 (6, 7) to 0 (0, 0) at one year postoperation (all P<0.05). Conclusion:In the treatment of osteogenic PAIS complicated with FHLT, total ankle arthroscopy for resection of the talus os trigonum and release of FHL can lead to fine efficacy and limited surgical invasion, resolving the FHL pathological inflammation and PAIS at the same time.

Objective:To explore the basic rules of hemodynamics of the multi-territory flap in the early stage.Methods:In this paper, based on the prototype of the free flaps and vascularized pedicled transpositional flaps. The angiosome theory was applied as a basis to systematically analyze the blood flow pathway, the resistance network, and the series or parallel connection mode between each resistance network within the flap, according to the knowledge of fluid mechanics and current pathway, and finally the mathematical model was used for deduction.Results:Based on the model, it can be concluded that a dynamic flow balance can be achieved in the arteries and veins of the multi-territory flap in the early stage and the flap could be divided into four areas: the effective microcirculation zone, the venous stasis zone, the relative ischemic zone and the absolute ischemic zone. And the following inferences can be drawn: (1) The blood supply to the vascular pedicle is constant by pressure rather than by flow. (2) The resistance of the flap varies by the position or the relative position of the arterial vascular pedicle and venous vascular pedicle. (3) The flow velocity decrease gradually from the pedicle to the distal end. (4) The main factors that lead to distal flap necrosis vary depending on the region in which they are located: the venous stasis zone is mainly due to obstructed venous return, and the relative and absolute ischemic zones are mainly due to insufficient arterial blood supply.Conclusions:The basic rules and characteristics of hemodynamics of the multi-territory flap in the early stage can be well explained by this theoretical model, the pedicled artery and vein of the flap can achieve a dynamic balance of flow, and the blood flow gradually decreases from the pedicle to the distal end. The survival range of the flap depends on the pressure difference between the artery and vein as well as the resistance of the blood flow path in the flaps. The distal necrotic area of the flap can be divided into venous stasis area and arterial insufficiency area.