Parasitic dermoid cysts may form from autoamputation of the ovarian mass secondary to torsion or rupture. It may then reimplant in surrounding structures and undergo subsequent neovascularization and further growth. The true incidence of these cases is unknown, however, a study reported a 0.04% incidence among 1,007 cases of dermoid cysts. This report describes the case of a 30-year-old multigravida who presented with an ultrasound finding of an ovarian dermoid cyst, which, upon laparoscopic surgery, turned out to be a parasitic dermoid cyst adherent to the bladder, with grossly normal bilateral ovaries. Theories on the development of parasitic dermoid cyst are also presented.
Human ; Female ; Adult: 25-44 yrs old ; dermoid cyst ; laparoscopy

The clinical burden of colorectal cancer (CRC) is high. Population-based screening and early detection are essential to improve the long-term clinical outcome. Nonetheless, a significant proportion of patients still present at an advanced stage, including with acute large bowel obstruction. Image-enhanced endoscopy and artificial intelligence can improve the detection and diagnosis of colonic adenomas and early cancer. Endoscopic resection is regarded as the preferred curative treatment option for colonic adenoma and T0 and T1 CRC limited to the superficial submucosa. Emergency colonic stenting as bridge to interval curative surgery is increasingly accepted as a first-line option when technically feasible. Minimally invasive resection techniques such as laparoscopic colectomy and robot-assisted colorectal surgery have also come of age. These techniques reduce post-treatment morbidity, shorten the recovery process and can be cost-effective while maintaining long-term oncological cure. These outcome measures are relevant to our patients; therefore, minimally invasive approaches to curative resection should be embraced.
Humans ; Colorectal Neoplasms/surgery* ; Minimally Invasive Surgical Procedures/methods* ; Laparoscopy/methods* ; Colectomy/methods* ; Robotic Surgical Procedures/methods* ; Treatment Outcome ; Colonoscopy/methods*

BACKGROUND: Telesurgery has the potential to overcome spatial limitations for surgeons, which depends on surgical robot and the quality of network communication. However, the influence of network latency and bandwidth on telesurgery is not well understood. METHODS: A telesurgery system capable of dynamically adjusting image compression ratios in response to bandwidth changes was established between Beijing and Sanya (Hainan province), covering a distance of 3000 km. In total, 108 animal operations, including 12 surgical procedures, were performed. Total latency ranging from 170 ms to 320 ms and bandwidth from 15-20 Mbps to less than 1 Mbps were explored using designed surgical tasks and hemostasis models for renal vein and internal iliac artery rupture bleeding. Network latency, jitter, frame loss, and bit rate code were systemically measured during these operations. National Aeronautics and Space Administration Task Load Index (NASA-TLX) and a self-designed scale measured the workload and subjective perception of surgeons. RESULTS: All 108 animal telesurgeries, conducted from January 2023 to June 2023, were performed effectively over a total duration of 3866 min. The operations were completed with latency up to 320 ms and bandwidths as low as 1-5 Mbps. Hemostasis for vein and artery rupture bleeding models was effectively achieved under these low bandwidth conditions. The NASA-TLX results indicated that latency significantly impacted surgical performance more than bandwidth and image clarity reductions. CONCLUSIONS This telesurgery system demonstrated safety and reliability. A total of 320 ms latency is acceptable for telesurgery operations. Reducing image clarity can effectively mitigate the potential latency increase caused by decreased bandwidth, offering a new method to reduce the impact of latency on telesurgery.
Animals ; Robotic Surgical Procedures/methods* ; Laparoscopy/methods*

With advancements in surgical technology, minimally invasive and function- preserving approaches have become fundamental objectives of both patients and physicians. In recent years, laparoscopic endoscopic cooperative surgery (LECS) has gained increasing attention for its significant role in achieving these goals. However, a notable gap remains in the availability of evidence-based guidelines to standardize the clinical implementation of LECS for gastrointestinal tumors. This guideline is collaboratively developed by the Gastrointestinal Stromal Tumor Committee of the Chinese Anti-Cancer Association, Chinese Gastric Cancer Association, the NOTES Group of the Digestive Endoscopy Branch of the Chinese Medical Association, and the Greater Bay Area Laparoscopic Endoscopic Cooperative Surgery Alliance. Through integrating the current best evidence and experts' opinions, we developed 22 recommendations on 16 clinical questions, including the LECS indications, use of antibiotics, enhanced recovery after surgery, wound suture, and surgical training. This guideline provides comprehensive guidance and recommendations for LECS, aimed at promoting the precise, minimally invasive and function-preserving treatment of gastrointestinal tumors.
Humans ; Laparoscopy/methods* ; Gastrointestinal Neoplasms/surgery* ; Endoscopy, Gastrointestinal/methods* ; China

The incidence of hiatal hernia is on the rise due to population aging and improved awareness of the disease. Laparoscopic repair is the main treatment modality; however, there remains a lack of consensus on the selection of mesh materials and operative specifications. Based on high-level evidence, this expert consensus has formulated 11 recommendations regarding the indications for mesh application, material selection, and operative methods: For patients with giant hiatal hernias (defect area >10 cm², hiatal diameter ≥ 5 cm, or over 1/3 of the gastric body entering the thoracic cavity), complex hernias, recurrent hernias, or those with weak diaphragmatic crura, mesh-reinforced repair is recommended to reduce the risk of recurrence. Synthetic meshes are suitable for giant/complex hernias; biological meshes help reduce foreign body reactions; and bioabsorbable synthetic meshes combine mechanical strength with safety. The preferred shape of the mesh is U-shaped, and fixation methods (non-absorbable sutures, absorbable staplers, or medical adhesives) are selected based on hernia size and anatomical features. For suturing the diaphragmatic crura, non-absorbable sutures are recommended, with the choice between interrupted or continuous suturing techniques tailored to patient characteristics. The method of fundoplication is determined according to esophageal pH measurement and lower esophageal sphincter pressure, and non-absorbable sutures are recommended for plication.
Humans ; Hernia, Hiatal/surgery* ; Laparoscopy/methods* ; Surgical Mesh ; Herniorrhaphy/methods*

Objective: To investigate the feasibility and safety of modified interposed jejunal anastomosis following total laparoscopic proximal gastrectomy. Methods: The modification in the digestive tract reconstruction involves transecting the small intestine 2-3 cm below the gastrojejunostomy site and relocating the enteroenterostomy cranially, based on the double-tract anastomosis technique. Specifically, the jejunum and its mesenteric vessels are transected 20-25 cm from the ligament of Treitz. An overlap anastomosis is performed between the esophagus and the distal jejunum, with the common opening closed using a 15 cm barbed suture in a buried manner. A side-to-side gastrojejunostomy is completed under natural anatomical alignment, and the common opening is closed similarly. A side-to-side anastomosis is then created between the small intestine approximately 10 cm below the gastrojejunal anastomosis and the small intestine distal to the ligament of Treitz. Finally, the small intestine is transected 2-3 cm below the gastrojejunal anastomosis without dividing the mesenteric vessels. Results: From April to December 2024, a total of five patients with adenocarcinoma of the esophagogastric junction underwent modified interposed jejunum anastomosis following totally laparoscopic proximal gastrectomy at the Affiliated Tumor Hospital of Xinjiang Medical University. The median age of the group was 56 (53-74) years, including four males and one female, with a median body mass index of 24 (21-29) kg/m². Three cases were classified as Siewert type II and two as type III. All five patients successfully completed the totally laparoscopic proximal gastrectomy with modified interposed jejunum anastomosis. The median operative time was 215 (165-240) minutes, the digestive tract reconstruction time was 75 (65-93) minutes, and the intraoperative blood loss was 50 (30-100) ml. The median time to postoperative flatus was 71 (68-88) hours, with no severe complications occurring in any case. The median postoperative hospital stay was 8 (8-9) days. Within three months after surgery, none of the patients reported reflux symptoms such as acid regurgitation or heartburn. Conclusions: Total laparoscopic modified interposed jejunal anastomosis is safe and feasible, with relatively simple operative steps. It effectively prevents reflux while ensuring the passage of food through the remnant stomach and duodenal loop.
Humans ; Gastrectomy/methods* ; Jejunum/surgery* ; Laparoscopy/methods* ; Anastomosis, Surgical/methods* ; Male ; Female ; Middle Aged ; Aged ; Stomach Neoplasms/surgery* ; Plastic Surgery Procedures/methods*

OBJECTIVE: To investigate the safety and prognostic factors influencing the treatment of upper urinary tract urothelial carcinoma (UTUC) combined with bladder cancer (BCa) by laparoscopic simultaneous radical cystectomy and nephroureterectomy (RCNU). METHODS: The clinical data of patients admitted to Peking University Third Hospital for laparoscopic RCNU surgery from January 2009 to September 2023 were analyzed retrospectively. Based on the same gender, age (±5 years), history of uroepithelial tumors, underlying diseases, T-stage, N-stage, M-stage, American Society of Anesthesiologists (ASA) score, Charlson comorbidity index, and body mass index (BMI) (±5), 34 patients with RCNU were matched 1 ∶1 with patients with bladder cancer who underwent laparoscopic radical cystectomy (RC) alone. Kaplan-Meier survival analysis was used to calculate patient survival, and Cox proportional regression risk model was used to analyze clinical factors affecting prognosis. RESULTS: Of the 68 patients enrolled, the follow-up rate was 100% with a median follow-up time of 27.0 (11.7, 60.2) months. Comparison of intraoperative conditions (including operation time, estimated intraoperative bleeding, intra-operative blood transfusion, etc.) between the two groups of patients showed no significant difference (P>0.05). Comparison of preoperative creatinine and postoperative creatinine between the two groups of patients showed significant differences (P < 0.05). The perioperative Clavien grade Ⅲ-Ⅳ complication rates were 2.9% (1/34) in the RC group and 5.9% (2/34) in the RCNU group. There was no significant difference in terms of perioperative complications between the two groups. Overall survival was significantly lower in the patients receiving RCNU compared with the matched group receiving RC alone (P < 0.05). Cox regression analysis suggested that two factors, high N stage and high postoperative creatinine, were independent risk factors affecting the prognosis of patients in the 2 groups (P < 0.05). CONCLUSION The overall survival prognosis of patients undergoing RCNU surgery was worse compared with laparoscopic RC surgery alone during the same period. There was no clinically significant difference between the two groups in terms of operation time, intraoperative bleeding, and perioperative complications, and there were clinically significant differences in preoperative renal function and post-operative renal function.
Humans ; Laparoscopy/methods* ; Nephroureterectomy/methods* ; Cystectomy/methods* ; Prognosis ; Male ; Retrospective Studies ; Female ; Urinary Bladder Neoplasms/mortality* ; Middle Aged ; Aged

Bariatric and metabolic surgery has become a primary treatment for decompensated obesity, with the number of procedures rapidly increasing in China in recent years. Various improved and novel surgical techniques have emerged. Given the characteristics of the Chinese obese population lower body mass index compared to Western populations and frequent pancreatic islet dysfunction laparoscopic Roux-en-Y gastric bypass remains one of the mainstream procedures in China. Although the Procedural Guideline for Laparoscopic Roux-en-Y Gastric Bypass (2019 Edition) has provided standardized surgical steps, mastering and routinely implementing the procedure in clinical practice continues to pose significant challenges. Compared to laparoscopic sleeve gastrectomy, laparoscopic Roux-en-Y gastric bypass is more technically demanding and requires a longer learning curve. To avoid suboptimal weight loss or severe postoperative complications resulting from non-standardized techniques, this article summarizes the authors' clinical experience, emphasizing key technical steps: creation of the gastric pouch, standardization of gastrojejunal and jejunojejunal anastomoses, hiatal closure, and full serosalization. These insights aim to improve procedural safety and therapeutic efficacy by offering a set of practical process optimization strategies.
Humans ; Gastric Bypass/methods* ; Laparoscopy/methods* ; Obesity, Morbid/surgery* ; Postoperative Complications/prevention & control* ; China ; Jejunum/surgery* ; Gastrectomy/methods* ; Anastomosis, Surgical/methods* ; Weight Loss

Pneumothorax during pediatric laparoscopic surgery is a potentially fatal complication that may not be promptly recognized. It can occur due to congenital anatomical abnormalities, pre-existing pulmonary disease, or operative factors during laparoscopy. Clinical presentation may range from asymptomatic to acute respiratory distress, pleuritic chest pain, and even life-threatening circulatory collapse. Here, we report a case of sudden intraoperative pneumothorax accompanied by extensive subcutaneous emphysema of the neck and chest wall during laparoscopic high ligation of the hernial sac in a child. The child presented with a reducible left lower abdominal mass and mild pain 3 days prior but did not seek medical attention. Symptoms worsened 1 day prior to admission, with difficulty reducing the mass. On April 8, 2021, the patient was admitted to the Department of Anesthesiology, Zhuzhou Hospital Affiliated to Xiangya School of Medicine of Central South University, with a diagnosis of "left inguinal hernia." On the second day of hospitalization, laparoscopic high ligation of the left inguinal hernia sac was performed under general anesthesia. During the procedure, the patient developed a sudden increase in airway pressure, marked hemodynamic fluctuations, crepitus in the neck and right anterior chest regions, and significantly diminished breath sounds in the right lung. Emergent bedside chest X-ray confirmed a right-sided pneumothorax. Immediate intervention including thoracic needle decompression, closed thoracic drainage, the lung re-expansion was performed. The patient was discharged on the 7th postoperative day with full recovery. This case highlights the need for clinicians to remain vigilant for iatrogenic pneumothorax during pediatric laparoscopic surgery. Close intraoperative monitoring of vital signs is crucial for early detection, recognition, and timely management of pneumothorax to ensure patient safety during minimally invasive procedures.
Humans ; Laparoscopy/methods* ; Pneumothorax/etiology* ; Ligation/methods* ; Hernia, Inguinal/surgery* ; Male ; Intraoperative Complications/etiology* ; Child ; Herniorrhaphy/methods* ; Female ; Subcutaneous Emphysema/etiology*

Objective To investigate the effects of laparoscopic sleeve gastrectomy(LSG)on the cardiac structure and function in obese patients with heart failure(HF)and compare the efficacy of LSG across obese patients with different HF types.Methods This study included 33 obese patients with HF who underwent LSG.The clinical indicators were compared between before operation and 12 months after operation.Repeated measures analysis of variance was employed to evaluate the changes in echocardiographic parameters before operation and 3,6,and 12 months after operation.Patients were allocated into a HF with preserved ejection fraction group(n=17),a HF with mildly reduced ejection fraction group(n=5)and a HF with reduced ejection fraction(HFrEF)group(n=11)based on left ventricular ejection fraction(LVEF)before operation for subgroup analyses of the effects of LSG on the cardiac structure and function of obese patients with HF.The paired samples t-test was conducted to assess the degree of cardiac structural and functional alterations after LSG.Results The 33 patients included 69.7% males,with an average age of(35.3±9.9)years,and a body mass index(BMI)of(51.2±9.8)kg/m².The median follow-up was 9.0(5.0,13.3)months.Compared with the preoperative values,the postoperative BMI(P=0.002),body surface area(BSA)(P=0.009),waist circumference(P=0.010),hip circumference(P=0.031),body fat content(P=0.007),and percentage of patients with cardiac function grades Ⅲ-IV(P<0.001)decreased.At the 12-month follow-up left atrial diameter(P=0.006),right atrial long-axis inner diameter(RAD1)(P<0.001),right atrial short-axis inner diameter(RAD2)(P<0.001),right ventricular inner diameter(P=0.002),interventricular septal thickness at end-diastolic(P=0.002),and left ventricular end-diastolic volumes(P=0.004)and left ventricular end-systolic volumes(P=0.003) all significantly reduced compared with preoperative values.Additionally,left ventricular fractional shortening and LVEF improved(both P<0.001).Subgroup analyses revealed that cardiac structural parameters significantly decreased in the HF with preserved ejection fraction,HF with mildly reduced ejection fraction,and HFrEF subgroups compared with preoperative values.Notably,the HFrEF group demonstrated the best performance in terms of left atrial diameter(P=0.003),left ventricular inner diameter at end-diastole(P=0.008),RAD1(P<0.001),RAD2(P=0.004),right ventricular inner diameter(P=0.019),left ventricular end-diastolic volume(P=0.004)and left ventricular end-systolic volume(P=0.001),cardiac output(P=0.006),tricuspid regurgitation velocity(P=0.002),and pulmonary artery systolic pressure(P=0.001) compared to preoperatively.Postoperative left ventricular fractional shortening(P<0.001,P=0.003,P<0.001)and LVEF(P<0.001,P=0.011,P=0.001)became higher in all the three subgroups than the preoperative values.Conclusions LSG decreased the body weight,BMI,and BSA,improved the cardiac function grade,reversed the enlargement of the left atrium and left ventricle,reduced the right atrium and right ventricle,and enhanced the left ventricular systolic function.It was effective across obese patients with different HF types.Particularly,LSG demonstrates the best performance in improving the structures of both atria and ventricles in obese patients with HFrEF.
Humans ; Male ; Female ; Gastrectomy/methods* ; Heart Failure/complications* ; Adult ; Obesity/physiopathology* ; Laparoscopy ; Middle Aged ; Heart/physiopathology* ; Stroke Volume