[Uniquely Shaped Giant Thrombus in the Right Atrium after Long-term Insertion of Central Venous Catheters].

Thrombosis around intravenous catheters are often found in daily practice, and their treatment must be considered if they are mobile or large. However, in such giant thrombosis cases as this one, it is considered that thrombolytic therapy is ineffective and that immediate surgical resection is the best choice of treatment. The patient had a very uniquely-shaped right atrial thrombus.

Tele-robotic distal gastrectomy with lymph node dissection on a cadaver.

The purpose of this study is to evaluate the performance of tele-robotic distal gastrectomy (tele-RDG) with lymph node dissection (LND) using a novel Japanese-made surgical robot hinotori™ (Medicaroid, Kobe, Japan) in a cadaver with a presumptive gastric cancer. The Cadaveric Anatomy and Surgical Training Laboratory (CAST-Lab.) at Hokkaido University and Kushiro City General Hospital (KCGH) are connected by a guaranteed type line (1 Gbps), and the distance between the two facilities is 250 km. A patient cart was installed at CAST-Lab, and a surgeon cockpit was installed at KCGH. Tele-RDG with D2 LND was performed on an adult human cadaver. In all surgical processes, the communication environment was stable without image degradation, and the mean round trip time was 40 milliseconds (36.5-55 milliseconds). For tele-RDG with D2 LND, the operation time was 199 minutes without any technical problems. Tele-RDG using hinotori™ was feasible and similar to local robotic RDG.

Adenocarcinoma arising from an ectopic pancreas in the duodenum: a case report.

BACKGROUND: The malignant transformation of an ectopic pancreas in the duodenum is extremely rare. Herein, we report a case of an adenocarcinoma that arose from an ectopic pancreas. We also reviewed 14 cases of malignant transformations arising from an ectopic pancreas in the duodenum that were previously published. CASE PRESENTATION: An 81-year-old man with a 1-month history of vomiting was admitted to our institution. Esophagogastroduodenoscopy (EGD) and computed tomography (CT) scans revealed an obstruction at the first part of the duodenum. A distal gastrectomy was performed for diagnostic and therapeutic purposes. The histopathological examination of the resected specimen showed adenocarcinoma that arose from an ectopic pancreas (Heinrich type 1). The patient is alive without relapse at 18 months of follow-up. CONCLUSIONS: Adenocarcinoma that arises from an ectopic pancreas should be considered when an obstruction is identified in the duodenum.

Cervical Castleman's disease mimicking lymph node metastasis of esophageal carcinoma.

Castleman's disease (CD) is an uncommon benign lymphoproliferative disorder of unknown etiology. A rare case of cervical CD diagnosed at lymph node dissection for esophageal carcinoma is reported. An esophageal tumor was identified in a 67-year-old man during a follow-up examination after surgery for oral carcinoma. Esophagoscopy revealed a type 1 tumor in the cervical esophagus. Histology of esophagoscopic biopsies indicated squamous cell carcinoma. Contrast-enhanced computed tomography revealed swollen lymph nodes of the right cervical region. No distant metastasis was detected. Esophageal carcinoma, T2N2M0, Stage IIIA was diagnosed. Neoadjuvant chemotherapy was recommended, but the patient rejected the chemotherapy. The patient underwent laparoscopic-assisted transhiatal esophagectomy. The histopathological diagnosis was moderately differentiated squamous cell carcinoma with pT1bN0M0, Stage IA. On histology, the swollen lymph nodes of the right cervical region revealed CD. The patient's postoperative course was relatively good.

Randomized controlled trial of perioperative antimicrobial therapy based on the results of preoperative bile cultures in patients undergoing biliary reconstruction.

BACKGROUND: The high frequency of surgical site infections (SSIs) after hepato-pancreato-biliary (HPB) surgery is a problem that needs to be addressed. This prospective, randomized, controlled study examined whether perioperative prophylactic use of antibiotics based on preoperative bile culture results in HPB surgery could decrease SSI. METHODS: Participants comprised 126 patients who underwent HPB (bile duct, gallbladder, ampullary, or pancreatic) cancer surgery with biliary reconstruction at Hokkaido University Hospital between August 2008 and March 2013 (UMIN Clinical Trial Registry #00001278). Before surgery, subjects were randomly allocated to a targeted group administered antibiotics based on bile culture results or a standard group administered cefmetazole. The primary endpoint was SSI rates within 30 days after surgery. Secondary endpoint was SSI rates for each operative procedure. RESULTS: Of the 126 patients, 124 were randomly allocated (targeted group, n = 62; standard group, n = 62). Frequency of SSI after surgery was significantly lower in the targeted group (27 patients, 43.5%) than in the standard group (44 patients, 71.0%; P = 0.002). Among patients who underwent pancreaticoduodenectomy and hepatectomy, SSI occurred significantly less frequently in the targeted group (P = 0.001 and P = 0.025, respectively). CONCLUSIONS: This study demonstrated that preoperative bile culture-targeted administration of prophylactic antibiotics decreased SSIs following HBP surgery with biliary reconstruction.

Pancreatic Pseudocyst Ruptured due to Acute Intracystic Hemorrhage.

Rupture of pancreatic pseudocyst is one of the rare complications and usually results in high mortality. The present case was a rupture of pancreatic pseudocyst that could be treated by surgical intervention. A 74-year-old man developed abdominal pain, vomiting, and diarrhea, and he was diagnosed with cholecystitis and pneumonia. Three days later, acute pancreatitis occurred and computed tomography (CT) showed slight hemorrhage in the cyst of the pancreatic tail. After another 10 days, CT showed pancreatic cyst ruptured due to intracystic hemorrhage. Endoscopic retrograde cholangiopancreatography revealed leakage of contrast agent from pancreatic tail cyst to enclosed abdominal cavity. His left hypochondrial pain was increasing, and CT showed rupture of the cyst of the pancreatic tail into the peritoneal cavity was increased in 10 days. CT showed also two left renal tumors. Therefore we performed distal pancreatectomy with concomitant resection of transverse colon and left kidney. We histopathologically diagnosed pancreatic pseudocyst ruptured due to intracystic hemorrhage and renal cell carcinoma. Despite postoperative paralytic ileus and fluid collection at pancreatic stump, they improved by conservative management and he could be discharged on postoperative day 29. He has achieved relapse-free survival for 6 months postoperatively. The mortality of pancreatic pseudocyst rupture is very high if some effective medical interventions cannot be performed. It should be necessary to plan appropriate treatment strategy depending on each patient.

Pancreatic arteriovenous malformation.

An unusual case of pancreatic arteriovenous malformation (P-AVM) combined with esophageal cancer is reported. A 59-year-old man was admitted with upper abdominal pain. Contrast-enhanced computed tomography showed numerous strongly enhanced abnormal vessels and a hypovascular lesion in the area of the pancreatic tail. Angiographic study of the celiac artery confirmed racemose vascular networks in the tail of the pancreas. Endoscopic retrograde pancreatography revealed narrowing and displacement of the main pancreatic duct in the tail of the pancreas. Screening esophagoscopy showed a 0-IIa+IIc type tumor in the lower thoracic esophagus. Histological examination of esophagoscopic biopsies showed squamous cell carcinoma. Based on these findings, P-AVM or pancreatic cancer and esophageal cancer were diagnosed. Video-assisted thoracoscopic esophagectomy and distal pancreatectomy were performed. Histological examination of the resected pancreas revealed abundant abnormal vessels with intravascular thrombi. In addition, rupture of a dilated pancreatic duct with pancreatic stones and both severe atrophy and fibrosis of the pancreatic parenchyma were observed. The final diagnoses were P-AVM consequent to severe chronic pancreatitis and esophageal carcinoma. The patient's postoperative course was relatively good.