{"title":"Diagnostic tactics of hematocolpos following imperforate hymen mimicking a large ovarian cyst: A case report and a literature review","authors":"K.A. Nethuki Akithma Kulasinghe , Khvoryk Natallia","doi":"10.1016/j.sycrs.2026.100163","DOIUrl":"10.1016/j.sycrs.2026.100163","url":null,"abstract":"<div><h3>Background</h3><div>Imperforate hymen is a rare congenital defect of female genital tract resulting from the failure of embryologic canalization. This condition typically goes undiagnosed until menarche, when accumulated menstrual blood in the vagina leads to hematocolpos. Initial symptoms can include back pain, tenesmus, constipation, cyclic pelvic and abdominal pain, and difficulty urinating in conjunction with irregular menstruation.</div></div><div><h3>Case presentation</h3><div>This report presents a case of a 13-year-old female patient presenting with persistent lower abdominal pain without a history of menstruation. Initial transabdominal ultrasound due to its unspecific nature, suggested the presence of a large left ovarian cyst and a right ovarian cyst. Following the physical examination, MRI was performed in order to avoid misdiagnosis and to differentiate the mass. The MRI sequences depicted a right ovarian cyst and a dilated vaginal cavity with a hemorrhagic component (hematocolpos). Following the diagnosis, hymenotomy was performed with cross incisions and evacuation of 500 ml of hemolyzed brown blood was carried out. Post-operative ultrasound examination showed resolution of the space occupying mass which was previously mistaken as a left ovarian cyst.</div></div><div><h3>Conclusion</h3><div>This case study highlights the critical importance of a thorough physical examination and the use of MRI as a definitive secondary diagnostic tool when ultrasound findings are doubtful in young girls presenting with a pelvic mass and amenorrhea, to ensure prompt and accurate surgical management.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100163"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Surgery Case ReportsPub Date : 2026-03-01Epub Date: 2026-02-17DOI: 10.1016/j.sycrs.2026.100160
Rika M. Hoshina, Konrad P. Aguila, Elias T. Reala
{"title":"Beauty and the beast: A case report on congenital nevus at the nasal tip","authors":"Rika M. Hoshina, Konrad P. Aguila, Elias T. Reala","doi":"10.1016/j.sycrs.2026.100160","DOIUrl":"10.1016/j.sycrs.2026.100160","url":null,"abstract":"<div><div>This is a case of a 15-year-old male with a congenital hyperpigmented lesion on the nasal tip and columella, which increased in size as the patient grew. A childhood consult and preoperative assessment were performed; however, the patient was lost to follow-up. During adolescence, he again sought consultation for removal of the lesion, which by then occupied multiple nasal subunits. A bilobed rotational flap of the nasal tip and a medial lip advancement flap were performed in a single operation to reconstruct the affected area. The use of these techniques allowed preservation of the philtrum and other important aesthetic units of the face. The patient not only tolerated the procedure well but was also prepared to face life—head up, loud, and proud.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100160"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Surgery Case ReportsPub Date : 2026-03-01Epub Date: 2026-02-26DOI: 10.1016/j.sycrs.2026.100170
Adnaldo da Silveira Maia , Matheus Ximenes Tavares , Alexia Borges Bernardes , Antônio Agostinho Moura Filho , Luciana Rascov , Gabriel Damasio Palma da Fonseca , Bruno Silva Ribeiro , Felipe Reale Cividanes , Diego Felipe Gaia , José Honório de Almeida Palma da Fonseca
{"title":"Transcatheter bicaval valve implantation for severe tricuspid regurgitation in a patient with multiple pacemaker leads – case report","authors":"Adnaldo da Silveira Maia , Matheus Ximenes Tavares , Alexia Borges Bernardes , Antônio Agostinho Moura Filho , Luciana Rascov , Gabriel Damasio Palma da Fonseca , Bruno Silva Ribeiro , Felipe Reale Cividanes , Diego Felipe Gaia , José Honório de Almeida Palma da Fonseca","doi":"10.1016/j.sycrs.2026.100170","DOIUrl":"10.1016/j.sycrs.2026.100170","url":null,"abstract":"<div><div>Tricuspid regurgitation is often underdiagnosed and carries a poor prognosis when severe, while conventional surgery poses high risk in elderly patients with comorbidities. We report the case of a 72-year-old man with Chagas disease, permanent pacemaker, cardiac resynchronization therapy, and heart failure with reduced ejection fraction, who presented with NYHA class IV symptoms and recurrent hospitalizations for edema and ascites. Given the elevated surgical risk, an endovascular TricValve procedure was performed. The patient improved to NYHA class I in the early postoperative period and remained clinically stable without rehospitalizations at 8-month follow-up. The TricValve system is emerging as a therapeutic option for high-risk surgical candidates, improving quality of life and reducing admissions. To the authors knowledge, this is first case of TricValve implantation in a patient with multiple pacemaker leads. This case underscores the growing role of transcatheter therapies as effective alternatives.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100170"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Surgery Case ReportsPub Date : 2026-03-01Epub Date: 2026-02-27DOI: 10.1016/j.sycrs.2026.100178
Patrick C. Barrett , David A. Stewart Jr. , Colin J. Rog , Mohamed M. Alassas , Evan S. Ong
{"title":"Pseudomyxoma peritonei following fine needle aspiration of a large intraductal papillary mucinous neoplasm: A case report","authors":"Patrick C. Barrett , David A. Stewart Jr. , Colin J. Rog , Mohamed M. Alassas , Evan S. Ong","doi":"10.1016/j.sycrs.2026.100178","DOIUrl":"10.1016/j.sycrs.2026.100178","url":null,"abstract":"<div><div>Pseudomyxoma peritonei (PMP) is a rare disorder characterized by diffuse intraperitoneal mucin accumulation, most often arising from appendiceal or ovarian mucinous neoplasms. Less frequent primary sites include the colon, small bowel, gallbladder, lung, urachus, and rarely, the pancreas. Pancreas-associated PMP has been reported with mucinous adenocarcinoma and intraductal papillary mucinous neoplasms (IPMN), typically due to spontaneous cyst rupture or iatrogenic spread after resection with positive margins. We report a case of rapid-onset PMP following fine needle aspiration (FNA) of a large IPMN, with findings suggestive of procedural rupture. An 81-year-old woman with atrial fibrillation and asthma underwent imaging after a fall, revealing an 18 cm multilobulated macrocystic mass of the pancreatic body and tail concerning for malignancy. Endoscopic ultrasound-guided FNA was performed which demonstrated no carcinoma. Soon after, she developed progressive abdominal distension and mucinous ascites. Exploratory laparotomy at an outside hospital evacuated 3.5 liters of intraperitoneal mucin without resection. Persistent symptoms prompted referral to our institution, where she underwent debulking with evacuation of 8 liters of mucin, distal pancreatectomy, splenectomy, and cholecystectomy. Her postoperative course was prolonged but stable, and she was discharged to a skilled nursing facility with ongoing outpatient follow-up. This case highlights a rare but significant mechanism of peritoneal dissemination in IPMN. While FNA is commonly used for diagnostic evaluation, instrumentation of large, tension-filled cystic neoplasms may precipitate rupture and subsequent PMP, warranting careful consideration when sampling giant IPMNs.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100178"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Large congenital mesoblastic nephroma resected in a newborn: A case report","authors":"Samisha Khangaonkar , Drashya Shah , Pooja Rao , Sathyaprasad Burjonrappa","doi":"10.1016/j.sycrs.2026.100157","DOIUrl":"10.1016/j.sycrs.2026.100157","url":null,"abstract":"<div><div>Congenital mesoblastic nephroma (CMN) is the most common renal tumor of infancy, typically diagnosed in the third trimester or early neonatal period. We present the case of a male infant born at 36 weeks and 3 days via emergency cesarean section after late prenatal ultrasound revealed a large abdominal mass. Postnatally, he developed respiratory distress, obstructive uropathy, acute kidney injury, and disseminated intravascular coagulation. Imaging revealed a large, heterogeneous left renal mass with features concerning for neuroblastoma. On day of life 4, the patient underwent radical nephrectomy with en bloc adrenalectomy. Gross pathology revealed a 9.0 × 7.0 × 6.5 cm cellular CMN weighing 263 g, with renal sinus extension and capsular disruption consistent with stage III disease. Surgical margins and lymph nodes were negative, and no metastatic disease was identified. Postoperatively, the patient experienced transient renal dysfunction but recovered baseline function with supportive care. Given tumor size, histology, and capsular involvement, adjuvant chemotherapy with vincristine and actinomycin D was initiated. This case highlights the diagnostic challenges of differentiating CMN from other neonatal renal and abdominal tumors, the complications associated with exceptionally large lesions, and the importance of prompt multidisciplinary intervention. Early diagnosis, coordinated perioperative management, and complete surgical excision remain critical for optimizing outcomes in neonates with CMN.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100157"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Surgery Case ReportsPub Date : 2026-03-01Epub Date: 2026-02-18DOI: 10.1016/j.sycrs.2026.100161
Maria Arain , Akbar Mistry , Umer Iqbal , Fahad Berlas , Muneer Amanullah
{"title":"Multidisciplinary approach to a large mycotic aneurysm of brachiocephalic trunk in a 13-year-old boy: A rare case report","authors":"Maria Arain , Akbar Mistry , Umer Iqbal , Fahad Berlas , Muneer Amanullah","doi":"10.1016/j.sycrs.2026.100161","DOIUrl":"10.1016/j.sycrs.2026.100161","url":null,"abstract":"<div><h3>Introduction</h3><div>Innominate artery (IA) aneurysms are extremely rare, especially in children and account for only 3 % of all arterial aneurysms. Given the potential for thrombosis and spontaneous rupture, it is recommended to have early elective surgical repair.</div></div><div><h3>Case report</h3><div>We report a case of a large mycotic pseudoaneurysm of the Innominate artery in a 13-year-old boy. He presented to the clinic with a 3-month history of increasing swelling over the right clavicular region along with progressive hoarseness of voice. Past medical history: treated pulmonary tuberculosis with Anti Tuberculous Therapy (ATT) 6 months before his symptoms. The case was presented in our multi-disciplinary meeting. Patient underwent elective surgical repair of the mycotic pseudoaneurysm of IA using a 7 mm Polytetrafluoroethylene (PTFE) graft using cardiopulmonary bypass and circulatory arrest. Post-operative course was uneventful, and the patient was discharged home on the third post-operative day. Early intervention and multidisciplinary management achieved excellent results.</div></div><div><h3>Conclusion</h3><div>Mycotic aneurysm of the innominate artery is a rare condition but is life-threatening, thus surgical treatment is urgent. We tackled this case with median sternotomy due to a total revascularization preference rather than an endovascular approach. This case has several implications for practicing clinicians.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100161"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Surgical resection of inoperable Lynch syndrome-related colorectal cancer following pembrolizumab treatment: Report of two cases","authors":"Yuki Matsumi , Kunitoshi Shigeyasu , Daisuke Kadowaki , Yusuke Yoshida , Ryohei Shoji , Yuya Sakurai , Nobuhiko Kanaya , Yoshitaka Kondo , Hideki Yamamoto , Takehiro Tanaka , Fuminori Teraishi , Shunsuke Kagawa , Toshiyoshi Fujiwara","doi":"10.1016/j.sycrs.2025.100149","DOIUrl":"10.1016/j.sycrs.2025.100149","url":null,"abstract":"<div><div>Recent therapeutic advances have dramatically improved outcomes in patients with colorectal cancer (CRC) with mismatch repair deficiency (dMMR) or high microsatellite instability (MSI). Approximately 20 % of patients with MSI-high CRC have Lynch syndrome, but few studies have reported the conversion of unresectable CRC to surgery in patients with Lynch syndrome. Here, we present two patients with dMMR/MSI-high CRC who successfully converted to surgery for tumor resection. Case 1 was a 73-year-old male patient diagnosed with MSI-high rectal cancer, which was unresectable due to extensive posterior infiltration. Pembrolizumab treatment led to a reduction in tumor size, allowing laparoscopic residual rectal resection. Case 2 was a 33-year-old female patient diagnosed with Stage IIIC descending colon cancer with iliopsoas muscle infiltration. The family history suggested a hereditary predisposition to CRC, and MSI testing led to the diagnosis of MSI-high CRC. The iliopsoas muscle infiltration prevented curative resection, but pembrolizumab treatment led to a reduction in tumor size, and the patient underwent laparoscopic partial resection of the descending colon. In both patients, postoperative genetic testing led to the definitive diagnosis of Lynch syndrome. The two cases illustrate the remarkable response of Lynch syndrome-associated CRC to pembrolizumab treatment, which allowed for conversion resection.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100149"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145580230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Laryngeal paraganglioma: a case report of neuroendocrine tumor in an unusual site","authors":"Bijan Khademi , Nazila Shirvani , Sara Mostafavi , Fateme Asadian , Mohammadreza Akhtari","doi":"10.1016/j.sycrs.2026.100171","DOIUrl":"10.1016/j.sycrs.2026.100171","url":null,"abstract":"<div><h3>Introduction</h3><div>Laryngeal paragangliomas are an exceptionally rare subtype of head and neck paragangliomas, accounting for less than 2% of all cases. Their nonspecific clinical presentation often mimics more common laryngeal lesions, posing diagnostic and therapeutic challenges.</div></div><div><h3>Case presentation</h3><div>We report a 56-year-old male with a 10-month history of progressive hoarseness, dysphagia, and dyspnea. Examination revealed mild stridor and palpable right submandibular lymph nodes. Contrast-enhanced computed tomography showed an elongated enhancing mass in the right glottic and supraglottic regions, with associated lymphadenopathy. Histopathology demonstrated Zellballen pattern nests of cuboidal cells, and immunohistochemistry confirmed paraganglioma with positivity for CD56, focal SMA, and a Ki-67 index of 4–5%. The patient underwent endoscopic laryngeal microsurgery with submucosal excision and mucosal grafting. Postoperative recovery was uneventful, and he remains recurrence-free under follow-up every six months.</div></div><div><h3>Conclusion</h3><div>Despite their rarity, laryngeal paragangliomas should be considered in the differential diagnosis of vascular laryngeal masses, especially in patients with hoarseness or airway compromise. Accurate diagnosis and tailored surgical excision are essential for optimal outcomes.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100171"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Surgery Case ReportsPub Date : 2026-03-01Epub Date: 2026-02-25DOI: 10.1016/j.sycrs.2026.100180
Fawwaz Al-Smadi , Huidong Yang , Sajeda Al-Smadi , Xudong Xie , Nadeer M. Gharaibeh , Wu Zhou , Bobin Mi , Guohui Liu
{"title":"Bilateral posterior shoulder fracture-dislocation following low-energy trauma treated with 3D-printed surgical planning: A case report and literature review","authors":"Fawwaz Al-Smadi , Huidong Yang , Sajeda Al-Smadi , Xudong Xie , Nadeer M. Gharaibeh , Wu Zhou , Bobin Mi , Guohui Liu","doi":"10.1016/j.sycrs.2026.100180","DOIUrl":"10.1016/j.sycrs.2026.100180","url":null,"abstract":"<div><h3>Background</h3><div>Bilateral posterior shoulder fracture–dislocation is rare and frequently missed, particularly after low-energy trauma. Delayed diagnosis can lead to worse outcomes and more invasive treatment.</div></div><div><h3>Case presentation</h3><div>A 60-year-old previously healthy man presented after a ground-level fall with bilateral shoulder pain, restricted motion, and inability to externally rotate. Initial anteroposterior radiographs raised suspicion for posterior dislocation; computed tomography confirmed bilateral posterior glenohumeral dislocation with comminuted proximal humeral fractures and reverse Hill–Sachs lesions. Three-dimensional (3D) reconstructions and patient-specific 3D-printed models were used to better delineate fracture morphology, rehearse reduction strategies, and support joint-preserving open reduction and internal fixation rather than arthroplasty. Total combined operative time for both shoulders was 182 min. At 12-month follow-up, the patient was pain-free with symmetric forward elevation of 130°, and Constant–Murley scores were 78 (right) and 81 (left), without early complications.</div></div><div><h3>Conclusion</h3><div>This case highlights the diagnostic challenge of bilateral posterior shoulder fracture–dislocation after low-energy trauma. Advanced imaging and patient-specific anatomical modeling may serve as useful adjuncts to support diagnosis and surgical planning in selected complex cases. This approach warrants further investigation in larger studies.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100180"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Different modalities of closed reduction of mandibular fractures in pediatrics: Case series","authors":"Mekhaeel Shehata Fakhry Mekhaeel , Sameh Mohamed Ahmed Eissa Salem , Andrey Vitalevitch Protasov , Kambiz Ebrahimi , Tahoura Talebidelooei , Mohamed Khaled Talaat Youssef Hassan , Aida Jahanbekam , Fatemeh Hassannezhad Neissi , Ali Sharifzadeh Ghazani , Mansouri Yasaman","doi":"10.1016/j.sycrs.2026.100177","DOIUrl":"10.1016/j.sycrs.2026.100177","url":null,"abstract":"<div><div>This study investigates five different closed reduction techniques for managing pediatric mandibular fractures, aiming to evaluate their effectiveness in restoring function and aesthetics. A total of five pediatric patients with mandibular fractures were treated using distinct methods: closed reduction with intermaxillary fixation (IMF), maxillary and mandibular arch bars, closed reduction with lower arch bar stabilization, interdental wire fixation, and circum-mandibular wiring. The outcomes were assessed through clinical and radiographic evaluation, with follow-up visits confirming successful fracture alignment and healing. The study highlights that closed reduction with IMF remains the gold standard for displaced fractures, while arch bars and lower arch bar stabilization offer effective, minimally invasive alternatives for stable fractures. Circum-mandibular wiring could be a suitable alternative for edentulous patient fractures requiring stabilization. This study emphasizes the importance of selecting the appropriate technique based on the fracture type, the patient’s age, dental status, and the overall clinical scenario. The results suggest that minimally invasive methods, such as various modalities of closed reduction, are effective in achieving favorable functional and aesthetic outcomes in pediatric mandibular fractures.</div></div>","PeriodicalId":101189,"journal":{"name":"Surgery Case Reports","volume":"7 ","pages":"Article 100177"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}