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Combined laparoscopic and thoracoscopic repair of adult right-sided Bochdalek hernia with massive liver prolapse: A case report

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World Journal of Clinical Cases 2024年第14期12卷 2420-2425页

作者： Shinya Mikami Sae Kimura yoshitsugu Tsukamoto Masaki Hiwatari Yasuhito Hisatsune Asako Fukuoka Tsunehisa Matsushita Takeharu Enomoto Takehito Otsubo Department of Gastrointestinal and General Surgery St.Marianna University School of MedicineKanagawa 216-8511Japan

BACKGROUND A Bochdalek hernia(BH)is a congenital diaphragmatic hernia that often develops in the neonatal *** typically occurs on the left side of the diaphragm.A right-sided BH in an adult is *** SUMMARY A 45-year-old man was referred to our hospital because of an abnormal shadow seen on chest radiography during a medical check-up.A chest radiograph showed elevation of the right *** tomography showed prolapse of multiple intraabdominal organs into the right thoracic cavity,corresponding to a right-sided *** herniated contents included the stomach,transverse colon,and left lobe of the *** left lobe of the liver was enlarged,particularly the medial *** surgery was ***,the left lobe of the liver was completely trapped in the thoracic ***,thoracoscopic manipulation had to be performed to return the liver to the abdominal *** hernia was repaired with interrupted nonabsorbable sutures and reinforced with *** Combined laparoscopic and thoracoscopic surgery was successfully performed for right-sided BH with massive liver prolapse and abnormal liver morphology.

关键词： Bochdalek hernia Right-sided Adult Laparoscopic and thoracoscopic repair Liver prolapse Abnormal liver morphology Case report

Evolution of Dentary Diastema in Iguanodontian Dinosaurs

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Acta Geologica Sinica(English Edition) 2009年第1期83卷 39-45页

作者： Katsuhiro kubota yoshitsugu KOBAYASHI Kanna Dinosaur Center Hokkaido University Museum Hokkaido University

The dentary diastema of iguanodontians has been considered to be related to its unique jaw mechanism for herbivorous adaptation. The dentary and diastema lengths of iguanodontians were measured and compared to elucidate the evolution of iguanodontian diastema. A gap in ratios between most non-hadrosaurid iguanodontians and hadrosaurids was observed, suggesting that all non- hadrosaurid iguanodontians, expect for Ouranosaurus nigeriensis and Protohadros byrdi, lack a diastema or have a short diastema, although some other taxa have been considered to have a long diastema in previous studies. In non-hadrosaurid iguanodontians, some large-sized forms, such as Iguanodon bernissartensis, Shuangmiaosaurus gilmorei, and possibly Eolambia caroljonesa, had a short diastema through ontogeny, whereas Ouranosaurus nigeriensis and Protohadros byrdi developed a long diastema convergently. The development of a long diastema of hadrosaurine hadrosaurids may be different from that of lambeosaurine hadrosaurids. Some hadrosaurines （Edmontosaurus annectens, Edmontosaurus regalis, and Saurolophus angustirostris） may have developed a long diastema in the subadult stage and showed little elongation of dentary diastema through ontogeny. Lambeosaurines （Corythosaurus casuarius and Lambeosaurus lambei） tend to have a short diastema in the embryonic and subadult stages, and an elongated diastema from the subadult to adult stages.

关键词： Cretaceous dentary diastema dinosaur iguanodontian ontogeny

Comment on“Perihilar cholangiocarcinoma-novel benchmark values for surgical and oncological outcomes from 24 expert centers”

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Hepatobiliary Surgery and Nutrition 2022年第2期11卷 314-316页

作者： Yasunari Kawabata yoshitsugu Tajima Department of Digestive and General Surgery Shimane University Faculty of MedicineIzumoShimaneJapan

Perihilar cholangiocarcinoma(PHC)is an aggressive malignancy of the biliary tracts with a dismal *** the primary goal of surgery for PHC is complete tumor removal with negative resection margins and regional lymphadenectomy,surgery for PHC with curative intent remains a challenge for surgeons because it involves complex surgical procedures such as bile duct resection,major hepatectomy,and/or vascular *** intensive procedures are often associated with postoperative complications,including severe morbidity and 30-day mortality with incidences of 40%and 5%,respectively(1).From the perspective of surgical and oncological safety,the standardization of aggressive surgical approaches and the establishment of standardized benchmark values that secure the best achievable outcomes are warranted in the treatment of patients with PHC.

关键词： surgical surgery mortality

Long-term survival of the Sister Mary Joseph nodule originating from breast cancer:A case report

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World Journal of Clinical Cases 2023年第34期11卷 8205-8211页

作者： Koji Kanayama Maki Tanioka yoshitsugu Hattori Takuya Iida Mutsumi Okazaki Department of Plastic and Reconstructive Surgery The University of TokyoTokyo 113-8655Japan Department of Medical Oncology National Cancer Center HospitalTokyo 104-0045Japan

BACKGROUND A Sister Mary Joseph nodule(SMJN)is an uncommon cutaneous metastasis found in the umbilicus,indicating an advanced *** typically originate from intra-abdominal sources,rarely from breast *** suggests a poor prognosis with a median survival of approximately 8 mo after *** patients with SMJNs is challenging,as most receive limited palliative care *** optimal strategy for long-term survival of these patients remains *** SUMMARY A 58-year-old female,previously diagnosed with right breast cancer 17 years ago and underwent breast-conserving surgery,adjuvant radiotherapy,and endocrine therapy,presented with a 2-cm umbilical *** years previously,metastases were detected in the right supraclavicular,infraclavicular,hilar,and mediastinal lymph *** umbilical nodule emerged four years before the date of presentation,confirmed as a skin metastasis of primary breast cancer upon excisional *** initial removal,the nodule recurred and grew,leading to her referral to our *** patient underwent extensive excision of the umbilical tumor and immediate abdominal wall *** therapy was continued *** years later,no local recurrence was observed,and the patient continued to work full-time,achieving over 9 years of survival following SMJN *** This case study aimed to identify the optimal strategy for achieving extended survival outcomes in patients with SMJN through comprehensive *** presented a case of the longest survival in a patient after undergoing a multidisciplinary treatment *** findings underscore the significance of adopting a multimodal treatment approach comprising timely and wide excision along with adjunctive *** approach can control the disease,prolong survival,and improve the quality of life in patients with SMJN.

关键词： Sister Mary Joseph nodule Breast cancer Cutaneous metastasis Long-term survival Abdominal wall reconstruction Case report

Successful resection of colonic metastasis of lung cancer after colonic stent placement:A case report and review of the literature

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World Journal of Gastrointestinal Surgery 2023年第7期15卷 1549-1558页

作者： Yoko Nakayama Minekazu Yamaguchi Keisuke Inoue Shunichi Hamaguchi yoshitsugu Tajima Department of Surgery Oda Municipal HospitalOda 694-0063ShimaneJapan Department of General Medicine Shimane University Faculty of MedicineIzumo 693-8501Japan Department of Digestive and General Surgery Shimane University Faculty of MedicineIzumo 693-8501Japan

BACKGROUND Lung cancer is the leading cause of cancer deaths *** lung cancer can metastasize to various organs such as the liver,lymph nodes,adrenal gland,bone,and brain,metastases to the digestive organs,especially the colon,are *** SUMMARY An 83-year-old man diagnosed with lung cancer received radiation and chemoimmunotherapy,resulting in a complete clinical *** year after the initial lung cancer diagnosis,the patient presented with obstructive ileus caused by a tumor in the descending *** elective left hemicolectomy was successfully performed after the endoscopic placement of a self-expandable metallic stent(SEMS).Pathologically,the tumor of the descending colon was diagnosed as lung cancer *** postoperative course was uneventful,and the patient is in good condition 13 mo after surgery,with no signs of *** previous 23 cases of surgical resection of colonic metastasis from lung cancer were reviewed using PubMed to characterize their clinicopathological features and *** SEMS is useful for obstructive colonic metastasis as a bridge to surgery to avoid emergency operations.

关键词： Colonic metastasis Colonic obstruction Lung cancer Self-expandable metallic stent Surgical resection Case report

Computational Complexity of a Solution for Directed Graph Cooperative Games

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Journal of the Operations Research Society of China 2013年第3期1卷 405-413页

作者： Ayumi Igarashi yoshitsugu Yamamoto Graduate School of Systems and Information Engineering University of TsukubaTsukubaIbaraki 305-8573Japan Faculty of Engineering Information and SystemsUniversity of TsukubaTsukubaIbaraki 305-8573Japan

Abstrac Khmelnitskaya et *** recently proposed the average covering tree value as a new solution concept for cooperative transferable utility games with directed graph *** average covering tree value is defined as the average of marginal contribution vectors corresponding to the specific set of rooted trees,and coincides with the Shapley value when the game has complete communication *** this paper,we discuss the computational complexity of the average covering tree *** show that computation of the average covering tree value is#P-complete even if the characteristic function of the game is{0,1}-*** prove this by a reduction from counting the number of all linear extensions of a partial order,which has been shown by Brightwell et *** be a#P-complete counting *** implication of this result is that an efficient algorithm to calculate the average covering tree value is unlikely to exist.

关键词： #P-complete Digraph game Average covering tree value Coalition Communication structure Linear extension

A New Basal Sauropod Dinosaur from the Lufeng Basin,Yunnan Province,Southwestern China

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Acta Geologica Sinica(English Edition) 2010年第6期84卷 1336-1342页

作者： LU Junchang yoshitsugu KOBAYASHI LI Tianguang ZHONG Shimin Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Hokkaido University Museum Hokkaido University Sapporo Hokkaido 060-0810 Japan Chuxiong Museum Chuxiong Yunnan 675000 China

A new dinosaur Chuxiongosaurus lufengensis *** *** erected based on a nearly complete *** taxon is characterized by the lacrimal perpendicular to the ventral margin of the upper jaw,which is similar to that of Thecodontosaurus;a depression present on the dorsal profile of the snout behind the naris;the rostral profile of the maxilla slopes continuously towards the rostral tip;and the presence of 25 dentary *** also displays prosauropod characters such as a relatively long skull,the slope of the maxillary rostral profile,and teeth that do not have basically constricted *** new specimen is more basal than Anchisaurus and represents the first basal sauropod dinosaur from the Early Jurassic of China.

关键词： taxonomy Chuxiongosaurus lufengensis Sauropoda Jurassic Yunnan southwestern China

Pancreatic carcinoma coexisting with chronic pancreatitis versus tumor-forming pancreatitis:Diagnostic utility of the time-signal intensity curve from dynamic contrast-enhanced MR imaging

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World Journal of Gastroenterology 2007年第6期13卷 858-865页

作者： yoshitsugu Tajima Tamotsu Kuroki Ryuji Tsutsumi Ichiro Isomoto Masataka Uetani Takashi Kanematsu Department of Surgery Nagasaki University Graduate School of Biomedical Sciences Japan Department of Radiology and Radiation Biology Nagasaki University Graduate School of Biomedical Sciences Japan

AIM: To evaluate the ability of the time-signal intensity curve (TIC) of the pancreas obtained from dynamic contrast-enhanced magnetic resonance imaging (MRI) for differentiation of focal pancreatic masses, especially pancreatic carcinoma coexisting with chronic pancreatitis and tumor-forming pancreatitis. METHODS: Forty-eight consecutive patients who underwent surgery for a focal pancreatic mass, including pancreatic ductal carcinoma (n = 33), tumor-forming pancreatitis (n = 8), and islet cell tumor (n = 7), were reviewed. Five pancreatic carcinomas coexisted with longstanding chronic pancreatitis. The pancreatic TICs were obtained from the pancreatic mass and the pancreatic parenchyma both proximal and distal to the mass lesion in each patient, prior to surgery, and were classified into 4 types according to the time to a peak: 25 s and 1, 2, and 3 min after the bolus injection of contrast material, namely, type-Ⅰ, Ⅱ, Ⅲ, and Ⅳ, respectively, and were then compared to the corresponding histological pancreatic conditions. RESULTS: Pancreatic carcinomas demonstrated type-Ⅲ (n = 13) or Ⅳ (n = 20) TIC. Tumor-forming pancreatitis showed type-Ⅱ (n = 5) or Ⅲ (n = 3) TIC. All islet cell tumors revealed type-Ⅰ. The type-Ⅳ TIC was only recognized in pancreatic carcinoma, and the TIC of carcinoma always depicted the slowest rise to a peak among the 3 pancreatic TICs measured in each patient, even in patients with chronic ***: Pancreatic TIC from dynamic MRI provides reliable information for distinguishing pancreatic carcinoma from other pancreatic masses, and may enable us to avoid unnecessary pancreatic surgery and delays in making a correct diagnosis of pancreatic carcinoma, especially, in patients with longstanding chronic pancreatitis.

关键词： Pancreatic carcinoma Chronic pancreatitis Focal pancreatic mass Tumor-forming pancreatitis Differential diagnosis, Dynamic magnetic resonance imaging Time-signal intensity curve

Extrahepatic collaterals and liver damage in embolotherapy for ruptured hepatic artery pseudoaneurysm following hepatobiliary pancreatic surgery

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World Journal of Gastroenterology 2007年第3期13卷 408-413页

作者： yoshitsugu Tajima Tamotsu Kuroki Ryuji Tsutsumi Ichiro Sakamoto Masataka Uetani Takashi Kanematsu Department of Surgery Nagasaki University Graduate School of Biomedical Sciences 1-7-1 Sakamoto Nagasaki 852-8501 Japan Department of Radiology and Radiation Biology Nagasaki University Graduate School of Biomedical Sciences 1-7-1 Sakamoto Nagasaki 852-8501 Japan

AIM: To evaluate the effects of extrahepatic collaterals to the liver on liver damage and patient outcome after embolotherapy for the ruptured hepatic artery pseudoa- neurysm following hepatobiliary pancreatic surgery. METHODS: We reviewed 9 patients who underwent transcatheter arterial embolization (TAE) for the ruptured hepatic artery pseudoaneurysm following major hepato- biliary pancreatic surgery between June 1992 and April 2006. We paid special attention to the extrahepatic arte- rial collaterals to the liver which may affect post-TAE liver damage and patient outcome. RESULTS: The underlying diseases were all malignan- cies, and the surgical procedures included hepatopancre- atoduodenectomy in 2 patients, hepatic resection with removal of the bile duct in 5, and pancreaticoduodenec- tomy in 2. A total of 11 pseudoaneurysm developed: 4 in the common hepatic artery, 4 in the proper hepatic artery, and 3 in the right hepatic artery. Successful he- mostasis was accomplished with the initial TAE in all patients, except for 1. Extrahepatic arterial pathways to the liver, including the right inferior phrenic artery, the jejunal branches, and the aberrant left hepatic artery, were identified in 8 of the 9 patients after the completion of TAE. The development of collaterals depended on the extent of liver mobilization during the hepatic resection, the postoperative period, the presence or absence of an aberrant left hepatic artery, and the concomitant arte- rial stenosis adjacent to the pseudoaneurysm. The liver tolerated TAE without significant consequences when at least one of the collaterals from the inferior phrenic ar-tery or the aberrant left hepatic artery was present. One patient, however, with no extrahepatic collaterals died of liver failure due to total liver necrosis 9 d after TAE. CONCLUSION: When TAE is performed on ruptured hepatic artery pseudoaneurysm, reduced collateral path- ways to the liver created by the primary surgical proce- dure and a short po

关键词： Hepatic artery pseudoaneurysm Transcatheter arterial embolization Extrahepatic collateral pathways Liver damage Hepatobiliary pancreatic surgery