Objective:To investigate the expression of syndecan-1 (SDC1) in human venous malformations and the effect of syndecan-1 (SDC1) silences on migration, invasion and angiogenesis of human umbilical vein endothelial cells (HUVECs).Methods:Pathological samples of venous malformation were selected from 20 patients with hemangioma surgically resected in the Third Affiliated Hospital of Zhengzhou University from December 2020 to June 2021 (10 males and 10 females, aged 1-57 years, median age 7 years ). HUVECs was purchased from American Type Culture Collection (ATCC ). Immunohistochemistry was used to detect the expression of SDC1 in venous malformations. The cytological experiments of HUVECs cultured in vitro were divided into two groups, transfected SDC1 small interfering RNA (siRNA) (si-SDC1 group) and control siRNA (control group), respectively. The siRNA with the best silencing effect was selected by real-time quantitative PCR and Western Blot method for follow-up experiments. Then the ability of HUVECs migration, invasion and angiogenesis was detected by scratch test, Transwell migration and invasion test and angiogenesis test, respectively.Results:SDC1 was positive in 13 of the 20 venous malformations and was mainly expressed in the cytoplasm of venous endothelial cells. Compared with HUVECs cells in NC group, the expression of SDC1 mRNA and protein in HUVECs cells in si-SDC1 group decreased, indicated that the synthesized siRNA targeting SDC1 could silence the expression of SDC1 , and the ability of HUVECs migration, invasion and angiogenesis were enhanced in si-SDC1 group.Conclusions:SDC1 was positively expressed in venous malformations. After silencing SDC1, the migration, invasion and tube formation ability of HUVECs were enhanced.

Objective:To investigate the expression of syndecan-1 (SDC1) in human venous malformations and the effect of SDC1 silencing on the migration, invasion and angiogenesis abilities of human umbilical vein endothelial cells (HUVECs).Methods:Twenty surgically resected samples of venous malformation were collected from 20 patients with hemangioma at the Third Affiliated Hospital of Zhengzhou University from December 2020 to June 2021 (10 males and 10 females, aged 1-57 years, median age 7 years). HUVECs were purchased from American Type Culture Collection (ATCC). Immunohistochemistry staining was used to detect the expression of SDC1 in venous malformations. HUVECs cultured in vitro were divided into two groups, and were transfected with SDC1 small interfering RNA (siRNA) (si-SDC1 group) or control siRNA (control group), respectively. The siRNA with the best silencing effect was screened and tested by real-time quantitative PCR and Western blotting for follow-up experiments. The migration, invasion and angiogenesis abilities of HUVECs were measured by scratch test, Transwell migration and invasion test, and angiogenesis test, respectively. Results:(1) SDC1 was positive in 13(65.0%) of the 20 venous malformations and was mainly expressed in the cytoplasm of venous endothelial cells. (2) Compared with HUVECs in the control group, the expression of SDC1 mRNA and protein in HUVECs cells in si-SDC1 group both decreased ( P<0.05), indicating the synthesized siRNA targeting SDC1 could silence the expression of SDC1. (3) The migration, invasion and angiogenesis abilities of HUVECs were enhanced in si-SDC1 group( P<0.05). Conclusions:SDC1 was expressed in most venous malformations. After silencing SDC1, the migration, invasion and tube formation abilities of HUVECs were enhanced.

Objective:To investigate the expression of syndecan-1 (SDC1) in human venous malformations and the effect of syndecan-1 (SDC1) silences on migration, invasion and angiogenesis of human umbilical vein endothelial cells (HUVECs).Methods:Pathological samples of venous malformation were selected from 20 patients with hemangioma surgically resected in the Third Affiliated Hospital of Zhengzhou University from December 2020 to June 2021 (10 males and 10 females, aged 1-57 years, median age 7 years ). HUVECs was purchased from American Type Culture Collection (ATCC ). Immunohistochemistry was used to detect the expression of SDC1 in venous malformations. The cytological experiments of HUVECs cultured in vitro were divided into two groups, transfected SDC1 small interfering RNA (siRNA) (si-SDC1 group) and control siRNA (control group), respectively. The siRNA with the best silencing effect was selected by real-time quantitative PCR and Western Blot method for follow-up experiments. Then the ability of HUVECs migration, invasion and angiogenesis was detected by scratch test, Transwell migration and invasion test and angiogenesis test, respectively.Results:SDC1 was positive in 13 of the 20 venous malformations and was mainly expressed in the cytoplasm of venous endothelial cells. Compared with HUVECs cells in NC group, the expression of SDC1 mRNA and protein in HUVECs cells in si-SDC1 group decreased, indicated that the synthesized siRNA targeting SDC1 could silence the expression of SDC1 , and the ability of HUVECs migration, invasion and angiogenesis were enhanced in si-SDC1 group.Conclusions:SDC1 was positively expressed in venous malformations. After silencing SDC1, the migration, invasion and tube formation ability of HUVECs were enhanced.

Objective:To investigate the expression of syndecan-1 (SDC1) in human venous malformations and the effect of SDC1 silencing on the migration, invasion and angiogenesis abilities of human umbilical vein endothelial cells (HUVECs).Methods:Twenty surgically resected samples of venous malformation were collected from 20 patients with hemangioma at the Third Affiliated Hospital of Zhengzhou University from December 2020 to June 2021 (10 males and 10 females, aged 1-57 years, median age 7 years). HUVECs were purchased from American Type Culture Collection (ATCC). Immunohistochemistry staining was used to detect the expression of SDC1 in venous malformations. HUVECs cultured in vitro were divided into two groups, and were transfected with SDC1 small interfering RNA (siRNA) (si-SDC1 group) or control siRNA (control group), respectively. The siRNA with the best silencing effect was screened and tested by real-time quantitative PCR and Western blotting for follow-up experiments. The migration, invasion and angiogenesis abilities of HUVECs were measured by scratch test, Transwell migration and invasion test, and angiogenesis test, respectively. Results:(1) SDC1 was positive in 13(65.0%) of the 20 venous malformations and was mainly expressed in the cytoplasm of venous endothelial cells. (2) Compared with HUVECs in the control group, the expression of SDC1 mRNA and protein in HUVECs cells in si-SDC1 group both decreased ( P<0.05), indicating the synthesized siRNA targeting SDC1 could silence the expression of SDC1. (3) The migration, invasion and angiogenesis abilities of HUVECs were enhanced in si-SDC1 group( P<0.05). Conclusions:SDC1 was expressed in most venous malformations. After silencing SDC1, the migration, invasion and tube formation abilities of HUVECs were enhanced.

Objective:To investigate the outcomes of therapeutic radiofrequency ablation (RFA) in unilateral intra-articular venous malformations (IAVMs) of the knee.Methods:The clinical data of 15 patients with intravascular venous malformation in the Third Affiliated Hospital of Zhengzhou University from February 2018 to May 2019 were retrospectively analyzed. There were 7 males and 8 females with an average age of 16 years (range, 5—25 years). All patients had unilateral knee involvement, ranging from localized lesions to diffuse extensive lesions. The radiofrequency ablation electrode needle with a diameter of 0.5 mm was selected and the power was adjusted to 25 W. Under the guidance of color ultrasound monitoring, the whole operation was carried out. The RFA electrode needle was inserted into the deepest site of the lesion and extracted by 1-mm graded movements until a point 1 mm from the surface of the lesion. Each ablation point was ablated for 10 to 30 seconds and multi-point ablation was done until the lesions were completely eliminated. Patients were followed up for 6 months to 1 year. Treatment outcomes were evaluated by functional activity, including extension, flexion, abduction, and adduction at the knee joint, and MRI findings, including intensity, shape, boundary, and degree of aggressiveness in the intra- and extraarticular cavities.Results:Included 15 patients; 12 had VMs in the knee joint cavity, and 3 had VMs involving both the intraarticular and extraarticular cavities (1 from the joint cavity to the calf, 1 from the joint cavity to the lower femur, and 1 from the intraarticular to the extraarticular cavity). All subjects underwent RFA, and the lesions were completely ablated and eradicated in a single operation. No recurrence was reported in the 6 months to 1 year follow-up. The knee joint remained symmetrical with the contralateral knee joint, without scarring, after the RFA.Conclusions:Radiofrequency ablation for the treatment of intra-articular venous malformation of the knee joint is a valuable minimally invasive surgical method with complete ablation, no complications, good prognosis and aesthetic appearance.

Objective:To evaluate the therapeutic effect of radiofrequency ablation in the treatment of severe hemangioma with thrombocytopenia and coagulation abnormality (Kasabach-Merritt phenomenon, KMP).Methods:From April 2018 to April 2021, 11 cases of KMP in our department were retrospectively analyzed. The patients underwent MRI, color ultrasound and hematology examination. Radiofrequency ablation was performed for all patients under general anesthesia. The comprehensive, multi-level and multi-point ablation was accurately implemented under the whole-process intraoperative monitoring of color ultrasound. Postoperative ice pad was applied for the treatment area, and dressing change was carried out every day.Results:All 11 cases of KMP were treated with radiofrequency ablation, including 5 males and 6 females, aged 1 d to 2 months, with a median age of 15 d. Intraoperative color Doppler ultrasound monitoring showed that the tumor was completely ablated in the single operation. All patients were followed up for 0.5 to 2 years. The tumor was cured without recurrence. The local function was unaffected. The local scar formation was mild and the appearance was satisfactory.Conclusions:Radiofrequency ablation has great clinical value in the treatment of KMP. It makes up the shortcomings and avoids the disadvantages of traditional surgery and other conservative treatment methods. Good clinical results can be achieved by radiofrequence ablation with satifactory function and appearance.

Objective:To investigate the outcomes of therapeutic radiofrequency ablation (RFA) in unilateral intra-articular venous malformations (IAVMs) of the knee.Methods:The clinical data of 15 patients with intravascular venous malformation in the Third Affiliated Hospital of Zhengzhou University from February 2018 to May 2019 were retrospectively analyzed. There were 7 males and 8 females with an average age of 16 years (range, 5—25 years). All patients had unilateral knee involvement, ranging from localized lesions to diffuse extensive lesions. The radiofrequency ablation electrode needle with a diameter of 0.5 mm was selected and the power was adjusted to 25 W. Under the guidance of color ultrasound monitoring, the whole operation was carried out. The RFA electrode needle was inserted into the deepest site of the lesion and extracted by 1-mm graded movements until a point 1 mm from the surface of the lesion. Each ablation point was ablated for 10 to 30 seconds and multi-point ablation was done until the lesions were completely eliminated. Patients were followed up for 6 months to 1 year. Treatment outcomes were evaluated by functional activity, including extension, flexion, abduction, and adduction at the knee joint, and MRI findings, including intensity, shape, boundary, and degree of aggressiveness in the intra- and extraarticular cavities.Results:Included 15 patients; 12 had VMs in the knee joint cavity, and 3 had VMs involving both the intraarticular and extraarticular cavities (1 from the joint cavity to the calf, 1 from the joint cavity to the lower femur, and 1 from the intraarticular to the extraarticular cavity). All subjects underwent RFA, and the lesions were completely ablated and eradicated in a single operation. No recurrence was reported in the 6 months to 1 year follow-up. The knee joint remained symmetrical with the contralateral knee joint, without scarring, after the RFA.Conclusions:Radiofrequency ablation for the treatment of intra-articular venous malformation of the knee joint is a valuable minimally invasive surgical method with complete ablation, no complications, good prognosis and aesthetic appearance.

Objective:To evaluate the therapeutic effect of radiofrequency ablation in the treatment of severe hemangioma with thrombocytopenia and coagulation abnormality (Kasabach-Merritt phenomenon, KMP).Methods:From April 2018 to April 2021, 11 cases of KMP in our department were retrospectively analyzed. The patients underwent MRI, color ultrasound and hematology examination. Radiofrequency ablation was performed for all patients under general anesthesia. The comprehensive, multi-level and multi-point ablation was accurately implemented under the whole-process intraoperative monitoring of color ultrasound. Postoperative ice pad was applied for the treatment area, and dressing change was carried out every day.Results:All 11 cases of KMP were treated with radiofrequency ablation, including 5 males and 6 females, aged 1 d to 2 months, with a median age of 15 d. Intraoperative color Doppler ultrasound monitoring showed that the tumor was completely ablated in the single operation. All patients were followed up for 0.5 to 2 years. The tumor was cured without recurrence. The local function was unaffected. The local scar formation was mild and the appearance was satisfactory.Conclusions:Radiofrequency ablation has great clinical value in the treatment of KMP. It makes up the shortcomings and avoids the disadvantages of traditional surgery and other conservative treatment methods. Good clinical results can be achieved by radiofrequence ablation with satifactory function and appearance.

Objective:To investigate the effect of radiofrequency ablation in the treatment of severe tongue′s lymphatic vascular malformation, and evaluate the value and aesthetics of the operation.Methods:The 33 cases′ data of lingual lymphatic vascular malformation from February 2018 to February 2019 in Department of Hemangioma Surgery of Third Affiliated Hospital of Zhengzhou University were analyzed retrospectively. There were 18 males and 15 females, aged from 1 month to 50 years old, with a median age of 5 years. From unilateral lesions to diffuse and extensive lesions, 33 of them received radiofrequency ablation.24 cases were unilateral and 9 cases were bilateral. 18G radiofrequency ablation needle was selectedwithworking tip diameter of 1mm and heating 5 mm tip , and the power was adjusted to 25 W. Monitoring by color Doppler ultrasound, the working tip was inserted into the bottom of the lesion part which is about 1 mm from the deepest part. The ablation was performed for 5-20 s after being electrified. Then the electrode needle was withdrawn 1 mm in turn until it was 1 mm from the lesion surface, and respectively performed multi-point ablation withinterval of 5 mm.Results:One-stage radiofrequency ablation was performed in 24 patients with unilateral lesions and 9 patients with bilateral lesions. One-stage radiofrequency ablation was performed in one side of the lesions. After three to six months later, two-stage radiofrequency ablation was performed in most of the lesions. 33 cases were followed up from 6 months to 2 years.18 cases of unilateral lesions and 6 cases of bilateral lesions had no recurrence, and the tongue was symmetrical on both sides; 9 cases of full-thickness involvement of the tongue (6 cases on one side and 3 cases on both sides) had a small amount of lesions near the lingual artery, which were asymptomatic, nearly cured, without obvious scars, and satisfactory in appearance.Conclusions:Radiofrequency ablation is an important supplement for the treatment of lingual lymphatic vascular malformation, which makes up for the shortcomings of traditional surgery. Clinically, it can primarily achieve the treatment′s goal, with unobvious complication and aesthetical outcome.

Objective:To investigate the effect of radiofrequency ablation in the treatment of severe tongue′s lymphatic vascular malformation, and evaluate the value and aesthetics of the operation.Methods:The 33 cases′ data of lingual lymphatic vascular malformation from February 2018 to February 2019 in Department of Hemangioma Surgery of Third Affiliated Hospital of Zhengzhou University were analyzed retrospectively. There were 18 males and 15 females, aged from 1 month to 50 years old, with a median age of 5 years. From unilateral lesions to diffuse and extensive lesions, 33 of them received radiofrequency ablation.24 cases were unilateral and 9 cases were bilateral. 18G radiofrequency ablation needle was selectedwithworking tip diameter of 1mm and heating 5 mm tip , and the power was adjusted to 25 W. Monitoring by color Doppler ultrasound, the working tip was inserted into the bottom of the lesion part which is about 1 mm from the deepest part. The ablation was performed for 5-20 s after being electrified. Then the electrode needle was withdrawn 1 mm in turn until it was 1 mm from the lesion surface, and respectively performed multi-point ablation withinterval of 5 mm.Results:One-stage radiofrequency ablation was performed in 24 patients with unilateral lesions and 9 patients with bilateral lesions. One-stage radiofrequency ablation was performed in one side of the lesions. After three to six months later, two-stage radiofrequency ablation was performed in most of the lesions. 33 cases were followed up from 6 months to 2 years.18 cases of unilateral lesions and 6 cases of bilateral lesions had no recurrence, and the tongue was symmetrical on both sides; 9 cases of full-thickness involvement of the tongue (6 cases on one side and 3 cases on both sides) had a small amount of lesions near the lingual artery, which were asymptomatic, nearly cured, without obvious scars, and satisfactory in appearance.Conclusions:Radiofrequency ablation is an important supplement for the treatment of lingual lymphatic vascular malformation, which makes up for the shortcomings of traditional surgery. Clinically, it can primarily achieve the treatment′s goal, with unobvious complication and aesthetical outcome.