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( Po-chih Yang ),( Hsin-chieh Huang ),( Kai-wen Huang ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1
Aims: Combined hepatocellular-cholangiocarcinoma (cHCC-CC) is a rare primary hepatic cancer with poor prognosis. Aggressive surgical planning with complete resection of cHCC-CC plays an important role in treatment. We presented one case of successful resection of huge cHCC-CC after portal vein embolization (PVE). Methods: This is a 46-year-old man with alcoholic liver cirrhosis. CT scan showed one 10cm infiltrative tumor in right liver with right anterior portal venous tumor thrombosis enhanced in arterial phase and washed out in portal venous phase. Regional enlarged lymph nodes is also noted. Under the preoperative diagnosis of HCC, right hepatectomy is planned. CT volumetry showed future liver remnant(FLR) is 480ml, 38.5% of standard liver volume. The ideal percentage of FLR in cirrhotic liver is more than 40% in our institution. Because of tumor thrombosis with total occlusion in right anterior portal pedicle, we performed PVE to right posterior portal vein for inadequate FLR. Two weeks after PVE, left liver enlarged from 480ml(38.5%) to 620ml(49.7%). There was no complication during PVE. Results: Right hepatectomy and regional lymph node dissection were performed two weeks after PVE. The post-operative course was smooth without any evidence of hepatic insufficiency. Pathology reported combined hepatocellular-cholangiocarcinoma but no malignant lymph nodes. There is no evidence of recurrence in follow-up CT scan 17 months after the operation until now. Conclusions: Aggressive surgical planning with PVE is effective for patient with cHCC-CC without adequate FLR even in cirrhotic liver. Complete resection may provide longer overall survival in this disease with dismal prognosis.
Chih-Yang Chan,Po-Chin Liang 대한영상의학회 2010 Korean Journal of Radiology Vol.11 No.4
A 41-year-old woman with liver cirrhosis had recurrent portal hypertension and bleeding from esophageal varices due to complete occlusion of a previously inserted transjugular intrahepatic portosystemic shunt stent. Because recanalization of the stent by the transjugular approach was unsuccessful, ultrasound-guided entry to the splenic vein and portal vein was used. After catheter-directed intrathrombus thrombolysis, successful opening of the stent was achieved and a stent was placed. We herein report a rare case in which thrombolysis and recanalization of a TIPS stent were performed via a percutaneous transhepatic approach.
Kao Ying-Hsien,Lin Yu-Chun,Lee Po-Huang,Lin Chia-Wei,Chen Po-Han,Tai Tzong-Shyuan,Chang Yo-Chen,Chou Ming-Huei,Chang Chih-Yang,Sun Cheuk-Kwan 한국조직공학과 재생의학회 2020 조직공학과 재생의학 Vol.17 No.5
Background: This study investigated whether xenotransplantation of human Wharton’s jelly-derived mesenchymal stem cells (WJ-MSCs) reduces thioacetamide (TAA)-induced mouse liver fibrosis and the underlying molecular mechanism. Methods: Recipient NOD/SCID mice were injected intraperitoneally with TAA twice weekly for 6 weeks before initial administration of WJ-MSCs. Expression of regenerative and pro-fibrogenic markers in mouse fibrotic livers were monitored post cytotherapy. A hepatic stallate cell line HSC-T6 and isolated WJ-MSCs were used for in vitro adhesion, migration and mechanistic studies. Results: WJ-MSCs were isolated from human umbilical cords by an explant method and characterized by flow cytometry. A single infusion of WJ-MSCs to TAA-treated mice significantly reduced collagen deposition and ameliorated liver fibrosis after 2-week therapy. In addition to enhanced expression of hepatic regenerative factor, hepatocyte growth factor, and PCNA proliferative marker, WJ-MSC therapy significantly blunted pro-fibrogenic signals, including Smad2, RhoA, ERK. Intriguingly, reduction of plasma fibronectin (pFN) in fibrotic livers was noted in MSC-treated mice. In vitro studies further demonstrated that suspending MSCs triggered pFN degradation, soluble pFN conversely retarded adhesion of suspending MSCs onto type I collagen-coated surface, whereas pFN coating enhanced WJ-MSC migration across mimicked wound bed. Moreover, pretreatment with soluble pFN and conditioned medium from MSCs with pFN strikingly attenuated the response of HSC-T6 cells to TGF-β1-stimulation in Smad2 phosphorylation and RhoA upregulation. Conclusion: These findings suggest that cytotherapy using WJ-MSCs may modulate hepatic pFN deposition for a better regenerative niche in the fibrotic livers and may constitute a useful anti-fibrogenic intervention in chronic liver diseases.
Cyclic Deformation and Phase Transformation of 6Mo Superaustenitic Stainless Steel
( Shing Hoa Wang ),( Chia Chang Wu ),( Chih Yuan Chen ),( Jer Ren Yang ),( Po Kay Chiu ),( Ja Son Fang ) 대한금속재료학회 ( 구 대한금속학회 ) 2007 METALS AND MATERIALS International Vol.13 No.4
A fatigue behavior analysis was performed on superaustenitic stainless steel UNS S31254 (Avesta Sheffield 254 SMO), which contains about 6 wt.% molybdenum, to examine the cyclic hardening/softening trend, hysteresis loops, the degree of hardening, and fatigue life during cyclic straining in the total strain amplitude range from 0.2 to 1.5 %. Independent of strain rate, hardening occurs first, followed by softening. The degree of hardening is dependent on the magnitude of strain amplitude. The cyclic stress-strain curve shows material softening. The lower slope of the degree of hardening versus the strain amplitude curve at a high strain rate is attributed to the fast development of dislocation structures and quick saturation. The ε martensite formation, either in band or sheath form, depending on the strain rate, leads to secondary hardening at the high strain amplitude of 1.5 %.