Vascular PDGFR-alpha protects against BBB dysfunction after stroke in mice.

Blood-brain barrier (BBB) dysfunction underlies the pathogenesis of many neurological diseases. Platelet-derived growth factor receptor-alpha (PDGFRα) induces hemorrhagic transformation (HT) downstream of tissue plasminogen activator in thrombolytic therapy of acute stroke. Thus, PDGFs are attractive therapeutic targets for BBB dysfunction. In the present study, we examined the role of PDGF signaling in the process of tissue remodeling after middle cerebral arterial occlusion (MCAO) in mice. Firstly, we found that imatinib increased lesion size after permanent MCAO in wild-type mice. Moreover, imatinib-induced HT only when administrated in the subacute phase of MCAO, but not in the acute phase. Secondly, we generated genetically mutated mice (C-KO mice) that showed decreased expression of perivascular PDGFRα. Additionally, transient MCAO experiments were performed in these mice. We found that the ischemic lesion size was not affected; however, the recruitment of PDGFRα/type I collagen-expressing perivascular cells was significantly downregulated, and HT and IgG leakage was augmented only in the subacute phase of stroke in C-KO mice. In both experiments, we found that the expression of tight junction proteins and PDGFRß-expressing pericyte coverage was not significantly affected in imatinib-treated mice and in C-KO mice. The specific implication of PDGFRα signaling was suggestive of protective effects against BBB dysfunction during the subacute phase of stroke. Vascular TGF-ß1 expression was downregulated in both imatinib-treated and C-KO mice, along with sustained levels of MMP9. Therefore, PDGFRα effects may be mediated by TGF-ß1 which exerts potent protective effects in the BBB.

Ruptured liver abscess presenting as pneumoperitoneum caused by Klebsiella pneumoniae: a case report.

BACKGROUND: Spontaneous gas-forming pyogenic liver abscess (GFPLA) is a rare complication with a high fatality rate in spite of aggressive management. Clinical spectrum of GFPLA can mimic hollow viscus perforation as it usually accompanied by pneumoperitoneum and peritonitis. Up to now, GFPLA has not been well studied in Vietnam. CASE PRESENTATION: We reported here a case with pneumoperitoneum caused by ruptured liver abscess in a 41-year-old man with a history of treated duodenal ulcer and uncontrolled type II diabetes mellitus. He had an epigastric pain associated with a high fever. Patient was diagnosed peritonitis and pneumoperitoneum presumed to be secondary to perforation of a hollow viscus and subjected to emergency laparotomy. We did not find any gastrointestinal perforation. Surprisingly, we detected a 4 cm × 4 cm pus-containing abscess in the left liver lobe of the liver. The abscess was ruptured. Pus was running into abdominal cavity through one hole. The abscess and abdominal cavities were cleaned up and abscess and abdominal drainages were performed. K. pneumoniae was isolated from culture of the abscess. The histopathological examination of the abscess did not yield any evidence of malignancy. Blood glucose levels were controlled. Antibiotic therapy was used according to antibiogram. A reassessment chest X-ray showed no air-fluid level or subdiaphragmatic air by the hospital day 14. Patient eventually made a full recovery and was discharged home 23 days after the operation. CONCLUSIONS: Ruptured GFPLA is a life-threatening complication. It is usually accompanied by peritonitis and pneumoperitoneum and can imitate hollow viscous perforation. In these cases, CT scan should be performed whenever it is possible to make a correct diagnosis. When the abscess has small size, partial hepatectomy might not be necessary and could be replaced by a careful cleaning and drainage of the abscess. Patient could show a good postoperative recovery following an appropriate antibiotic therapy.

Laparoscopic-cholangioscopic cooperative modified tunnel technique for hepatolithiasis combined with dilated common bile duct: A case report and literature review.

INTRODUCTION: Intrahepatic and extrahepatic lithiasis, a condition characterized by the presence of stones in the liver and bile ducts, is a common disease in Asia, particularly in East and Southeast Asia. We report a case with laparoscopic exploration of the common bile duct using a flexible cholangioscope and modified trans-common bile duct tunnel for hepatolithiasis combined with the dilated common bile duct. PRESENTATION OF CASE: A 35-year-old male patient has had chronic epigastric and right upper quadrant pain. The common bile duct was 11 mm dilated, and hepatolithiasis was also present, according to an upper abdomen MRI. The largest stone measured between 14 and 21 mm. A modified trans-common bile duct tunnel from the abdominal wall into the common bile duct was used in a laparoscopic procedure to examine the common bile duct. Complications during the procedure or following it were not present. The procedure took 120 min, and the blood loss was about 50 ml. The patient was discharged on the sixth postoperative day, and a follow-up visit one month later revealed that single-session stone clearance had been accomplished. DISCUSSION: Laparoscopic exploration of the common bile duct using a cholangioscope and modified trans-choledochal tube is applicable in selected patients and can be effectively and safely used to treat hepatolithiasis combined with the dilated common bile duct. CONCLUSION: In this case, we present an innovative approach for hepatolithiasis when combined with dilated common bile duct.

Effect of Donors' Biliary Variation on Postoperative Biliary Complications in Living Donor Liver Transplantation: A Single-Center Observational Study in Vietnam.

BACKGROUND: Our study aims to evaluate the biliary anatomy variation according to the Varotti classification and its correlation with surgical outcomes for both donors and recipients undergoing living donor liver transplants (LDLTs). METHODS: A retrospective analysis of 150 LDLT cases performed at a single center in Vietnam with preoperative radiologic evaluations and intraoperative surgical assessments to identify biliary variant anatomy. Postoperative biliary complications were documented and analyzed. Statistical analysis was performed to determine any significant associations between biliary variations and post-transplant outcomes. RESULTS: One hundred fifty cases of LDLT at 108 Military Central Hospital from October 2017 to December 2022 were included in our study. Among the donors, the mean age was 30.89 ± 7.23, with male predominance (77.3%). The prevalence of type 1 biliary anatomy was 84.67%. Type 2, 3a, 3b, 4a, and 4b accounted for 5.33%, 2.67%, 5.33%, 0.67%, and 1.33% of cases, respectively. Donors' complications were witnessed in 7 cases (4.67%), and all needed intervention (Clavien-Dindo grade 3). Biliary complications were found in 36 (24.0%) recipients, with 22 (14.67%) cases of biliary stenosis and 16 (10.67%) cases of biliary leak, including 2 cases encountering both complications. Age, gender, graft type, preoperative liver function, biliary variant anatomy, number of graft orifices, Model for End-Stage Liver Disease score, and blood loss were not significant risk factors for recipients' biliary complications. Cold ischemia time significantly increased the biliary complication rate. CONCLUSIONS: This study shows that biliary variant anatomy is common in living liver donors. Such variations should not be a contraindication to liver donation. However, accurate pre- and intraoperative radiologic and surgical evaluations are fundamental for a careful reconstruction plan.

Preliminary results of laparoscopic cholecystectomy using real-time indocyanine green fluorescence: a cross-sectional study.

Evaluating the results of laparoscopic cholecystectomy (LC) using indocyanine green (ICG) fluorescence. Materials and methods: This is a cross-sectional study of patients with LC using real-time fluorescent ICG to treat gallbladder disease from May 2021 to May 2022 in the 108 Military Central Hospital. Results: There were 68 patients who underwent LC using intraoperative ICG fluorescence for bile duct visualization. The mean age of the patients was 55.4±16.2, and the male/female ratio was 1.52. Chronic cholecystitis caused by stones accounted for the majority (51.47%). The authors detected 7.35% of cases with anatomical changes of the extrahepatic biliary tract using ICG fluorescence and clearly identified the anatomy of the common bile duct and the cystic duct at 100 and 92.65%, respectively. The average surgical time was 42.8±14.6 min. There were no postoperative complications or side effects from ICG; the average hospital stay was 2.8±1.5 days. Conclusions: ICG fluorescence cholangiography allows surgeons to easily identify critical anatomical landmarks in the LC. Thereby helping the surgery to be performed safely, avoiding severe complications due to damage to the biliary tract.

Spinal cord ischemia after transcatheter artery chemoembolization for hepatocellular carcinoma: A case-report.

INTRODUCTION: Transarterial hepatic chemoembolization (TACE) has been used to treat unresectable hepatocellular carcinoma and has gained widespread acceptance as a treatment for both primary and secondary hepatic malignancies. CASE REPORT: We report a case of 78-year-old male patient with chronic hepatitis B, diagnosed with HCC. He underwent the second TACE, and right after the procedure, the patient abruptly developed bilateral lower extremities motor weakness and sensory impairment below the T10 dermatome. Spinal magnetic resonance imaging showed T2-weighted scans showed increased intramedullary signal strength at the T1-T12 level. The patient received supportive care, ongoing rehabilitation, and steroid pulse therapy. The motor strength remained unchanged, but the sensory deficiencies practically disappeared. CLINICAL DISCUSSION: The hepatic artery injury or decreased flow at the prior TACE site, which causes collateral recruitment, can explain why spinal cord injury following TACE typically happens after the second or third session. It can occasionally result from accidental embolized spinal branches originating from intercostal or lumbar collateral arteries. In our case, we hypothesize the embolism caused the infarction to the spinal cord travel through the connection between the lateral branches of the right inferior phrenic artery and the intercostal arteries, which supply the spinal cord through the anterior spinal artery. CONCLUSIONS: TACE in rare case can have severe complications. A tailored therapeutic strategy, including consideration of a shunt and selection of the vessels utilized for the Lipiodol infusion prior to TACE, is crucial to achieving an optimal end outcome to avert these significant consequences.