Objective:To explore the safety and efficacy of computed tomography (CT) guided percutaneous interstitial brachytherapy in the treatment of recurrent cervical cancer with isolated lesions in the radiated field.Methods:A retrospective analysis was conducted on the clinical data of 30 patients with recurrent cervical cancer with isolated lesions in the radiated field who underwent CT guided percutaneous interstitial implantation for close range radiation treatment at Zhengzhou University Affiliated Cancer Hospital from March 2023 to August 2024. Under local anesthesia, a needle was implanted into the recurrent tumor in the pelvic or abdominal wall of the patients percutaneously guided by CT. The target area was delineated to ensure full dose coverage. The prescribed dose for high-risk clinical target areas was 600 cGy/time, once a week, followed by close range radiotherapy. The number of implanted needles were recorded, and the target area, radiation dose, and other parameters were evaluated through dose volume parameter maps. The degree of lesion shrinkage and the occurrence of complications during and after treatment were observed.Results:30 patients underwent a total of 72 rounds of brachytherapy with implantation, with a technical success rate of 100% (72/72). 20 cases received 2 treatments, 8 cases received 3 treatments, and 2 cases received 4 treatments; 4 cases used 1needle, 20 cases used 2 needles, 4 cases used 3 needles, and 2 cases used 4 needles. The high-risk clinical target dose D 90 was (718.17±222.61) cGy. The average dose D 2cc of 2 cm 3 surrounding the bladder, rectum, sigmoid colon, and small intestine was (168.29±53.80) cGy, (178.87±105.38) cGy, (136.05±78.06) cGy, and (288.91±117.49) cGy, respectively. The median follow-up time was 11 months. Among the 30 patients, there were 12 cases of complete remission,14 cases of partial remission, 3 cases of stable disease, and 1 case of disease progression, with an objective remission rate of 86.7%. None of the patients experienced significant bleeding or pain during treatment. After treatment, 3 patients with recurrent lymph nodes near the rectum developed grade 1 radiation proctitis, which was remitted after treatment. No significant complications were observed in the remaining patients. Conclusion:CT guided percutaneous brachytherapy is safe and feasible for the recurrence of single lesions in the radiated field of cervical cancer.

Objective:To establish a protocol for virus isolation using the mixed method, and evaluate the efficacy of the suspended method and the mixed method in isolating herpes simplex virus (HSV).Methods:Simulated HSV-infected clinical samples were prepared using HSV-1 F strain and CDC-P1 strain. Both the suspended method and the mixed method were used to isolate HSV-1 from these samples. The virus isolation efficiency of the mixed method under various conditions was assessed. These conditions included different multiplicity of infection (MOI), cell seeding densities, and virus adsorption times.The 50% tissue culture infective dose (TCID 50) assay was used for the assessment. The positive rates of virus detection under low viral load conditions were compared between the two methods. Results:Under the conditions of a MOI of 0.005, a virus adsorption time of 15 min, and a cell seeding density of 1×10 6 cell/ml, the mixed method achieved effective isolation of HSV-1. When the virus titer of the sample was 100 TCID 50/ml, the positivity rate of the mixed method reached 100.0%, while the positivity rates of the suspended method were 50.7% (38/75) and 52.0% (39/75) after cultured for 72 h and 96 h, respectively. When the virus titer of the sample was 10 TCID 50/ml, the positivity rate of the mixed method was 100.0%, while the positivity rate of the suspension method was 0. Conclusions:The mixed method exhibits significantly higher efficiency in HSV isolation compared with the suspended method. Under the conditions of high viral load, both the suspended method and the mixed method can be effective in isolating HSV-1. For clinical samples with low viral loads, the mixed method has greater applicability.

Background and Aims:Implant-based breast reconstruction is one of the most common reconstructive approaches after mastectomy for breast cancer.However,the incidence of postoperative complications remains significant,and the associated risk factors have not been fully elucidated.This study aimed to analyze the incidence of surgical complications following implant-based breast reconstruction in patients undergoing mastectomy at our center and to identify potential risk factors.Methods:A retrospective analysis was conducted on patients who underwent mastectomy and implant-based breast reconstruction at Sun Yat-sen Memorial Hospital between May 2004 and August 2022.Patients were grouped according to the presence or absence of postoperative surgical complications,and multivariate Logistic regression was used to identify independent risk factors.Results:A total of 545 patients with 602 reconstructed breasts were included.Surgical complications occurred in 13.6%(82/602)of the cases,including infection,wound dehiscence/poor healing,flap or nipple-areola necrosis,and implant leakage/rupture.Multivariate analysis revealed that nipple-areola complex resection(OR=1.934,95%CI=1.056-3.542,P=0.033),postoperative radiotherapy(OR=2.483,95%CI=1.527-4.036,P<0.001),implant volume≥300 mL(OR=1.663,95%CI=1.025-2.696,P=0.039),and surgeon experience with fewer than 10 cases(OR=1.804,95%CI=1.092-2.979,P=0.021)were all independent risk factors for complications.Conclusion:NAC resection,radiotherapy,large implant volume,and limited surgical experience are important independent risk factors for postoperative surgical complications following implant-based breast reconstruction.Thorough preoperative evaluation and appropriate surgical planning are essential to minimize risks.

Objective:To investigate the dynamic changes of cellular miRNA expression profiles in EBV latently infected Raji cells upon reactivation with Phorbol ester (TPA).Methods:Total RNA was extracted using TRIzol reagent from Raji cells treated with TPA at different time points (0 h, 24 h, 48 h). Small RNA libraries were constructed and sequenced on an Illumina SE50 platform. Differentially expressed miRNAs were identified, and their target genes were predicted and functionally annotated. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were carried out through online tools. Additionally, miRanda and RNAhybrid software were used to predict cellular miRNAs targeting the EBV genome. Real-time RT-qPCR was employed to validate the expression levels of differentially expressed novel miRNAs.Results:High-throughput sequencing identified 1 301 celluar miRNAs, comprising 1 189 known and 112 novel miRNAs. A total of 264 known differentially expressed cellular miRNAs and 13 novel miRNAs were identified through high-throughput miRNA sequencing. Secondary structure prediction revealed that the novel miRNAs exhibited typical pre-miRNA hairpin structures. Stem-loop quantitative real-time PCR (RT-qPCR) validation of Novel_miR_183 and Novel_miR_242 did not exhibit a statistically significant difference ( F=1.407, P=0.370 7 for Novel_miR_183; F=1.277, P=0.397 0 for Novel_miR_242) between the TPA-stimulated and untreated groups. Target gene prediction analysis revealed that the differentially expressed cellular miRNAs were involved in various important biological processes and signaling pathways. Furthermore, 1 189 known cellular miRNAs and 108 novel miRNAs were predicted to target the EBV genome. Conclusions:Treatment of Raji cells with TPA stimulation successfully reactivated Raji cells and significantly altered their miRNA expression patterns. Differentially expressed miRNAs were identified, suggesting that these miRNAs probably play crucial roles in regulating EBV infection and replication by directly targeting the EBV genome.

Objective:To investigate the prognostic impact of perineural invasion in patients with stageⅢ colon cancer and to clarify its guidance value for the duration of postoperative adjuvant chemotherapy.Methods:This study employed a retrospective cohort study method. It analyzed 426 patients with stageⅢ colon cancer who underwent radical surgery at Sun Yat-sen University Cancer Center and Longyan First Affiliated Hospital of Fujian Medical University, between April 2008 and June 2020. Inclusion criteria: patients received at least 3 months of adjuvant CapeOX therapy post-surgery, had complete pathological data, and were followed up for at least 12 months after the last chemotherapy. Among these patients, 231 were male, the median age was 59 (50~67) years, and 263 tumors were located in the right-sided colon. Postoperative pathology indicated that 107 cases (25.12%) had neural invasion, and 131 patients (30.75%) had vascular tumor thrombus. All patients received at least 4 cycles of postoperative CapeOX adjuvant chemotherapy, with 193 patients receiving 8 cycles and 233 patients receiving 4 to 7 cycles of adjuvant chemotherapy. The study analyzed the impact of neural invasion status and the duration of adjuvant chemotherapy on disease-free survival (DFS). Furthermore, within subgroups stratified by different risk levels (referencing the criteria proposed by the IDEA study: high risk: T4, N2 or T4N2; low risk: T3N1) and different neural invasion statuses, the impact of the duration of adjuvant chemotherapy on prognosis was analyzed.Results:The median follow-up time for the entire cohort was 94.00 months (55.27-128.80 months). Multivariate Cox analysis indicated that pathological T stage T4 (HR = 2.457, 95%CI: 1.499-4.029, P<0.001) and postoperative pathological confirmation of perineural invasion (HR = 2.465, 95% CI: 1.519-4.000, P<0.001) were independent adverse prognostic factors for 5-year DFS. In the perineural invasion-positive group, the 5-year DFS for patients who received 8 cycles of postoperative adjuvant CapeOX chemotherapy was 86.90%, compared to 58.22% for those who received 4-7 cycles, with statistically significant differences (both P<0.05). In the perineural invasion-negative group, the 5-year DFS for patients who received 8 cycles was 88.66%, compared to 90.99% for those who received 4-7 cycles, with no statistically significant differences ( P=0.929). Among IDEA high-risk patients with perineural invasion, the 5-year DFS was 91.81% for those who received 8 cycles versus 50.66% for those who received 4-7 cycles, showing a statistically significant difference ( P=0.003). In IDEA high-risk patients without perineural invasion, the 5-year DFS for those who received 8 cycles was 82.28% compared to 87.32% for those who received 4-7 cycles, with no statistically significant difference ( P=0.806). In the IDEA low-risk patients, no differences were observed in the 5-year DFS between patients receiving 8 cycles and those receiving 4-7 cycles of adjuvant CapeOX chemotherapy in both perineural invasion-positive and negative subgroups (both P>0.05). Conclusion:Perineural invasion serves as a significant prognostic factor for 5-year DFS in stage Ⅲ colon cancer patients who have undergone radical surgery and postoperative adjuvant chemotherapy. It can also be considered an important reference factor in deciding the duration of postoperative adjuvant chemotherapy.

With the continuous development of imaging techniques such as magnetic resonance imaging,the detection rate of brain metastases is increasing.Although the incidence rate of cystic brain metastasis is far lower than that of solid brain metastasis,patients with cystic brain metastasis are in urgent condition and have obvious space occupying effect,which is an urgent clinical problem.Previous literature has reported that cystic brain metastasis is more common in breast cancer and lung adenocarcinoma,especially in lung cancer patients with positive driver gene.This article reports a case of small cell lung cancer with cystic brain metastasis,which started with neurological symptoms,and was clinically cured under a multidisciplinary diagnosis and treatment model.Through dynamic imaging evaluation and molecular residual lesion detection,the patient can avoid overtreatment and achieved a relatively higher quality of life on the basis of prolonging survival.

Background and Aims:Implant-based breast reconstruction is one of the most common reconstructive approaches after mastectomy for breast cancer.However,the incidence of postoperative complications remains significant,and the associated risk factors have not been fully elucidated.This study aimed to analyze the incidence of surgical complications following implant-based breast reconstruction in patients undergoing mastectomy at our center and to identify potential risk factors.Methods:A retrospective analysis was conducted on patients who underwent mastectomy and implant-based breast reconstruction at Sun Yat-sen Memorial Hospital between May 2004 and August 2022.Patients were grouped according to the presence or absence of postoperative surgical complications,and multivariate Logistic regression was used to identify independent risk factors.Results:A total of 545 patients with 602 reconstructed breasts were included.Surgical complications occurred in 13.6%(82/602)of the cases,including infection,wound dehiscence/poor healing,flap or nipple-areola necrosis,and implant leakage/rupture.Multivariate analysis revealed that nipple-areola complex resection(OR=1.934,95%CI=1.056-3.542,P=0.033),postoperative radiotherapy(OR=2.483,95%CI=1.527-4.036,P<0.001),implant volume≥300 mL(OR=1.663,95%CI=1.025-2.696,P=0.039),and surgeon experience with fewer than 10 cases(OR=1.804,95%CI=1.092-2.979,P=0.021)were all independent risk factors for complications.Conclusion:NAC resection,radiotherapy,large implant volume,and limited surgical experience are important independent risk factors for postoperative surgical complications following implant-based breast reconstruction.Thorough preoperative evaluation and appropriate surgical planning are essential to minimize risks.

Objective:To investigate the prognostic impact of perineural invasion in patients with stageⅢ colon cancer and to clarify its guidance value for the duration of postoperative adjuvant chemotherapy.Methods:This study employed a retrospective cohort study method. It analyzed 426 patients with stageⅢ colon cancer who underwent radical surgery at Sun Yat-sen University Cancer Center and Longyan First Affiliated Hospital of Fujian Medical University, between April 2008 and June 2020. Inclusion criteria: patients received at least 3 months of adjuvant CapeOX therapy post-surgery, had complete pathological data, and were followed up for at least 12 months after the last chemotherapy. Among these patients, 231 were male, the median age was 59 (50~67) years, and 263 tumors were located in the right-sided colon. Postoperative pathology indicated that 107 cases (25.12%) had neural invasion, and 131 patients (30.75%) had vascular tumor thrombus. All patients received at least 4 cycles of postoperative CapeOX adjuvant chemotherapy, with 193 patients receiving 8 cycles and 233 patients receiving 4 to 7 cycles of adjuvant chemotherapy. The study analyzed the impact of neural invasion status and the duration of adjuvant chemotherapy on disease-free survival (DFS). Furthermore, within subgroups stratified by different risk levels (referencing the criteria proposed by the IDEA study: high risk: T4, N2 or T4N2; low risk: T3N1) and different neural invasion statuses, the impact of the duration of adjuvant chemotherapy on prognosis was analyzed.Results:The median follow-up time for the entire cohort was 94.00 months (55.27-128.80 months). Multivariate Cox analysis indicated that pathological T stage T4 (HR = 2.457, 95%CI: 1.499-4.029, P<0.001) and postoperative pathological confirmation of perineural invasion (HR = 2.465, 95% CI: 1.519-4.000, P<0.001) were independent adverse prognostic factors for 5-year DFS. In the perineural invasion-positive group, the 5-year DFS for patients who received 8 cycles of postoperative adjuvant CapeOX chemotherapy was 86.90%, compared to 58.22% for those who received 4-7 cycles, with statistically significant differences (both P<0.05). In the perineural invasion-negative group, the 5-year DFS for patients who received 8 cycles was 88.66%, compared to 90.99% for those who received 4-7 cycles, with no statistically significant differences ( P=0.929). Among IDEA high-risk patients with perineural invasion, the 5-year DFS was 91.81% for those who received 8 cycles versus 50.66% for those who received 4-7 cycles, showing a statistically significant difference ( P=0.003). In IDEA high-risk patients without perineural invasion, the 5-year DFS for those who received 8 cycles was 82.28% compared to 87.32% for those who received 4-7 cycles, with no statistically significant difference ( P=0.806). In the IDEA low-risk patients, no differences were observed in the 5-year DFS between patients receiving 8 cycles and those receiving 4-7 cycles of adjuvant CapeOX chemotherapy in both perineural invasion-positive and negative subgroups (both P>0.05). Conclusion:Perineural invasion serves as a significant prognostic factor for 5-year DFS in stage Ⅲ colon cancer patients who have undergone radical surgery and postoperative adjuvant chemotherapy. It can also be considered an important reference factor in deciding the duration of postoperative adjuvant chemotherapy.

With the continuous development of imaging techniques such as magnetic resonance imaging,the detection rate of brain metastases is increasing.Although the incidence rate of cystic brain metastasis is far lower than that of solid brain metastasis,patients with cystic brain metastasis are in urgent condition and have obvious space occupying effect,which is an urgent clinical problem.Previous literature has reported that cystic brain metastasis is more common in breast cancer and lung adenocarcinoma,especially in lung cancer patients with positive driver gene.This article reports a case of small cell lung cancer with cystic brain metastasis,which started with neurological symptoms,and was clinically cured under a multidisciplinary diagnosis and treatment model.Through dynamic imaging evaluation and molecular residual lesion detection,the patient can avoid overtreatment and achieved a relatively higher quality of life on the basis of prolonging survival.

Objective:To establish a protocol for virus isolation using the mixed method, and evaluate the efficacy of the suspended method and the mixed method in isolating herpes simplex virus (HSV).Methods:Simulated HSV-infected clinical samples were prepared using HSV-1 F strain and CDC-P1 strain. Both the suspended method and the mixed method were used to isolate HSV-1 from these samples. The virus isolation efficiency of the mixed method under various conditions was assessed. These conditions included different multiplicity of infection (MOI), cell seeding densities, and virus adsorption times.The 50% tissue culture infective dose (TCID 50) assay was used for the assessment. The positive rates of virus detection under low viral load conditions were compared between the two methods. Results:Under the conditions of a MOI of 0.005, a virus adsorption time of 15 min, and a cell seeding density of 1×10 6 cell/ml, the mixed method achieved effective isolation of HSV-1. When the virus titer of the sample was 100 TCID 50/ml, the positivity rate of the mixed method reached 100.0%, while the positivity rates of the suspended method were 50.7% (38/75) and 52.0% (39/75) after cultured for 72 h and 96 h, respectively. When the virus titer of the sample was 10 TCID 50/ml, the positivity rate of the mixed method was 100.0%, while the positivity rate of the suspension method was 0. Conclusions:The mixed method exhibits significantly higher efficiency in HSV isolation compared with the suspended method. Under the conditions of high viral load, both the suspended method and the mixed method can be effective in isolating HSV-1. For clinical samples with low viral loads, the mixed method has greater applicability.