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Abstract The renal arteries arise from the lateral side of the abdominal aorta at the L2 vertebral level, just below the origin of the superior mesenteric artery. Multiple aberrant renal arteries can pose difficulties in renal transplantation, interventional radiological and urological procedures, renal artery embolization, angioplasty, or vascular reconstruction for congenital and acquired lesions. We present a case of a left kidney supplied by the left renal artery along with superior and inferior polar arteries, arising from the aorta and inferior mesenteric artery respectively. The inferior mesenteric artery was crossed by the left ureter and inferior mesenteric vein. The superior polar artery gave rise to an inferior suprarenal artery making the variation important for clinicians and surgeons.
Resumo As artérias renais originam-se do lado lateral da aorta abdominal, no nível da vértebra L2, logo abaixo da origem da artéria mesentérica superior. A presença de múltiplas artérias renais aberrantes pode representar dificuldades para transplante renal, procedimentos radiológicos e urológicos intervencionistas, embolização da artéria renal, angioplastia e reconstrução vascular para lesões congênitas e adquiridas. Apresentamos um caso de rim esquerdo vascularizado pela artéria renal esquerda e pelas artérias polares superior e inferior, as quais se originavam da aorta e da artéria mesentérica inferior, respectivamente. A artéria mesentérica inferior era cruzada pelo ureter esquerdo e pela veia mesentérica inferior. A artéria polar superior dava origem à artéria suprarrenal inferior, o que torna essa variação importante para clínicos e cirurgiões.
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Objective To investigate the application value of diameter change of superior rectal vein (SRV) and inferior mesenteric vein (IMV) by CT examination in the efficacy evaluation of neoadjuvant therapy for locally advanced rectal cancer.Methods The retrospective descriptive study was conducted.The clinicopathological data of 40 patients with locally advanced rectal carcer who underwent neoadjuvant therapy in the First Affiliated Hospital of Chongqing Medical University were collected.There were 28 males and 12 females,aged from 12 to 75 years,with the age of (55± 12)years.All patients underwent radical resection of rectal cancer according to the principle of total mesorectal resection after neoadjuvant therapy.Observation indicators:(1) MRI examination;(2) CT examination;(3) surgical situations;(4) follow-up.Follow-up was performed using outpatient examination to detect postoperative complications up to June 2019.The measurement data with normal distribution were represented as Mean±SD,and paired sample t test was used for intra-group comparison.Count data were described as absolute numbers or percentages.Results (1) MRI examination:there were 22 patients with positive extramural vascular invasion (EMVI) and 18 with negative EMVI.(2) CT examination:the diameter of SRV was (3.9 ± 0.9) mm and (3.0 ± 0.6) mm before and after neoadjuvant therapy,showing a significant difference (t=5.75,P＜0.05).Subgroup analysis:for the 30 patients with response to neoadjuvant therapy,the diameter of SRV changed significantly after neoadjuvant therapy [(4.1 ± 1.0) mm vs.(3.4±0.7) mm,t =6.20,P＜0.05];for the 10 patients without response to neoadjuvant therapy,the diameter of SRV showed no significant difference after neoadjuvant treatment [(3.6±0.6)mm vs.(3.5±0.8)mm,t=1.13,P＞0.05].The diameter of SRV was (4.2±0.8)mm in 22 patients with EMVI and (3.7±0.8)mm in 18 patients with negative EMVI,showing a significant difference between the two groups (t =2.45,P＜0.05).The diameter of IMV was (5.1 ± 0.9)mm and (4.2±0.9)mm before and after neoadjuvant therapy,showing a significant difference (t=4.16,P＜ 0.05).Subgroup analysis:for the 30 patients with response to neoadjuvant therapy,the diameter of IMV changed significantly after neoadjuvant treatment [(5.1 ± 0.9) mm vs (4.6± 0.8) mm,t =0.76,P＜ 0.05];for the 10 patients without response to neoadjuvant therapy,the diameter of SRV showed no significant difference after neoadjuvant treatment [(5.0±0.9)mm vs (4.8±1.0)mm,t=0.76,P＞0.05].The diameter of IMV was (4.8± 0.9) mm in 22 patients with EMVI and (4.6±0.8) mm in 18 patients with negative EMVI,showing no significant difference between the two groups (t =2.45,P＞ 0.05).(3) Surgical situations:40 patients underwent radical resection of rectal cancer,including 4 with synchronous liver metastases undergoing resection of metastases.(4) Follow-up:40 patients were followed up for 3.0-6.0 months,with a median follow-up time of 4.5 months.One of 40 patients with perineal incision infection was improved and discharged after dressing change,1 with anastomotic leakage on the 5th day after operation was improved and discharged after conservative treatment,1 of 2 with adhesive intestinal obstruction was improved after surgery and 1 was improved after conservative treatment,other 36 patients were discharged and no obvious abnormality occured during the follow-up.Conclusions The diameters of SRV and IMV in patients with locally advanced rectal cancer can be significantly decreased significantly after neoadjuvant therapy.The diameters of SRV and IMV can be used as potential indices to evaluate the effects of neoadjuvant therapy for rectal cancer,and the SRV had a higher evaluation value.
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Objectives: Variations in branching of vessels have always been an area of keen interest in the field of anatomy.Variations of arteries are known and mentioned in literature too although studies on pattern of drainage of veinsare lacking. With this interest the following study was done with its importance in abdominal organ mobilizationresections surgeries.Materials and Methods: Present study was conducted with 24 formalin embalmed cadavers (20 Males and 4Females) procured from department of anatomy, Dr. D. Y. Patil Medical College, Dr. D. Y. Patil Vidyapeeth PimpriPune, India.Results: Inferior mesenteric vein drains venous blood from superior part of rectum, sigmoid colon and descendingcolon and generally terminate into splenic vein. However it may drain into superior mesenteric vein, at thejunction of superior mesenteric and splenic vein or portal vein.Conclusions: Knowledge of such variations of draining pattern of inferior mesenteric vein is an importantprerequisite for surgeons to choose an adequate technique to avoid injury during colorectal surgeries especiallyat the time of inferior mesenteric vein ligation.
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Objective To investigate clinical efficacy of pancreaticoduodenectomy combined with venous resection via inferior mesenteric vein (IMV) pathway for resectable pancreatic cancer with superior mesenteric vein (SMV) and / or anterior wall of portal vein (PV) involvements.Methods The retrospective cross-sectional study was conducted.The clinicopathological data of 38 resectable pancreatic cancer patients who underwent pancreaticoduodenectomy with venous resection via IMV pathway in the West China Hospital of Sichuan University between January 2013 and January 2017 were collected.The tumors of 25 patients were BR-PV type (simplex SMV and / or PV involvements),and tumors of 13 patients were BR-A type (SMV,celiac trunk and / or hcpatic artcry involvements).The pancreaticoduodenectomy via IMV pathway was the same as traditional surgery in organs resection and lymph node dissection,the difference was cutting off the pancreas at a junction between IMV and splenic vein when using IMV pathway.Observation indicators:(1) intraoperative and postoperative situations;(2) results of postoperative pathological examination;(3) follow-up and survival situations.Follow-up using outpatient examination and telephone interview was performed to detect postoperative survival up to January 2018.Measurement data with skewed distribution were described as M (range).The survival curve was drawn by the Kaplan-Meir method,and Log-rank test was used for survival analysis.Results (1)Intraoperative and postoperative situations:38 patients underwent intraoperative segmental resection of PV and / or SMV,including 30 with end-to-end anastomosis in situ and 8 with artificial vessel interposition anastomosis.Two of 38 patients were intraoperatively combined with common hepatic artery resection and end-to-end anastomosis in situ.There was no intraoperative celiac trunk resection.The operation time and volume of intraoperative blood loss of 38 patients were respectively 320 minutes (range,280-520 minutes) and 530 mL (range,420-650 mL).The incidence of total complications (Clavien-Dindo Ⅲ and above) of 38 patients was 18.4％ (7/38),and some patients were combined with multiple complications,including 6 with pulmonary infection,4 with pancreatic fistula (B and C grade),4 with intra-abdominal infection,3 with delayed gastric emptying,2 with postoperative bleeding and 2 with venous thrombosis.Five patients were cured by postoperative symptomatic treatment,and 2 with postoperative bleeding died of worsened condition after reoperation.The mortality at 90 days postoperatively and duration of hospital stay were respectively 5.3％(2/38) and 12 days (range,9-52 days).(2) Results of postoperative pathological examination:the R0 resection rate of 38 patients was 81.6％ (31/38).The R0 resection rate of 25 patients in BR-PV type was 92.0％ (23/25),and resection margin of pancreatic leading edge ＜ 1 mm was in 2 patients without R0 resection;R0 resection rate of 13 patients in BR-A type was 8/13,and resection margin of pancreatic leading edge ＜ 1 mm was in 2 patients and resection margin of SMV ＜ 1 mm was in 4 patients (1 margined with resection margin of multiple sites ＜ 1 mm) of patients without R0 resection.The resection margins of pancreatic trailing edge,venous cut edge and pancreatic cut edge in patients with BR-PV type and BR-A type were more than and equal to 1mm.The venous infiltration rate in patients with BR-PV type and BR-A type was respectively 100.0％ (25/25) and 9/13.(3) Follow-up and survival situations:38 patients were followed up for 6-40 months,with a median time of 15 months,and survival time was 18 months (range,6-40 months).The survival time and 1-,2-and 3-year cumulative survival rates were respectively 23 months (range,8-40 months),89.5％,33.1％,22.1％ in 25 patients with BR-PV type and 16 months (range,6-25 months),83.9％,16.8％,0 in 13 patients with BR-A type.The tumor-free survival time and 1-and 2-year cumulative tumor-free survival rates were respectively 15 months (range,5-30 months),63.0％,7.5％ in patients with BR-PV type and 9 months (range,4-18 months),11.5％,0 in patients with BR-A type.Conclusion For resectable pancreatic cancer with SMV and / or anterior wall of PV involvements,pancreaticoduodenectomy combined with venous resection via IMV pathway could avoid injury of SMV and / or PV,and increase negative rates of venous and pancreatic resection margins.
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[Objective] To measure the diameter of the superior rectal vein (SRV) & theinferior mesenteric vein (IMV) by CT and analyze their relationship with lymphatic metastasis of rectal carcinoma.And to discuss the feasibility of utilizing SRV to prcdict lymph node metastasis of rectal cancer.[Methods] The CT imaging and pathological data of 105 rectal carcinoma patients were analyzed retrospectively.We measured and compared the diameter of every patient's SRV & IMV by CT in the presence and absence of microvascular tumor thrombus,signet ring cell,lymph node metastasis and distant metastasis.The accuracy of predicting lymph node metastasis for rectal carcinoma by the diameter of SRV were evaluated by ROC curve.[Results] There were statistical differences in the diameters of SRV and IMV between rectal cancer group with lymph node metastasis (D =4.34 mm,D =5.00 mm) and without (D =3.56 mm,D =4.81 mm;P ＜ 0.001,P =0.023).The differences were significant in the diameter of SRV between rectal cancer group with microvascular tumor thrombus or signet ring cell and without (P =0.019,P =0.044).However,the diameter of IMV showed no statistical difference between rectal cancer group with microvascular tumor thrombus or signet ring cell and without (P =0.605,P =0.663).And there was no statistical difference in the diameter of SRV or IMV between rectal cancer patients with distant metastasis and without (P ＞ 0.05).Regarding 3.75 mm as the cut-off value for the diameter of SRV to predict lymph node metastasis for rectal cancer patients,the sensitivity was 90.9％ and the specificity was 82.0％.Regarding 4.65 mm as the cut-off value for the diameter of IMV to predict lymph node metastasis for rectal cancer patients,the sensitivity was 87.3％ and the specificity was 38％.[Conclusions] It is completely feasible to utilize the diameter of SRV measured by CT to predict lymph node metastasis of rectal carcinoma with high sensitivity,accuracy,and relatively high specificity.
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Knowledge of communication between parietal abdominal veins, testicular vein and mesenteric veins is important for Surgeons, Urologists and Radiologists. These communications can result in varicocele or hemorrhoids and may lead to low success rate in hemorrhoid and varicocele surgeries. During routine dissection classes, we observed an unusual large venous plexus on the left psoas major muscle. The venous plexus was unilateral and was formed by many anastomotic venous channels on the psoas fascia and communicated with the left testicular and inferior mesenteric veins. The testicular and inferior mesenteric veins were significantly enlarged below the level of communication with the venous plexus.
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Mesenteric VeinsABSTRACT
Objective To investigate the clinical efficacy of pancreaticoduodenectomy with vein resection (PD + VR) via inferior mesenteric vein(IMV) for tumors in the head and neck of pancreas.Methods The clinical data of 62 patients who underwent modified PD + VR for tumors in the head and neck of pancreas at the West China Hospital of Sichuan University between January 2006 to December 2013 were retrospectively analyzed.Twenty-eight patients undergoing Whipple procedure via inferior mesenteric vein were allocated to the WATIMV group,and 34 patients with pancreatic transection as central pancreatectomy undergoing PD + VR were allocated to the c-PD + VR group.The operation time,volume of intraoperative blood loss,rate of patients with intraoperative blood loss ＞ 800 mL,rate of intraoperative blood transfusion,length of vein resection,R1 resection rate,site of positive margin,incidence of complications,classification of complications and duration of postoperative hospital stay were compared between the 2 groups.Patients were followed up via outpatient examination and telephone interview till December 2014.Count data of ratio and proportion were compared by the chi-square test.Measurement data with normal distribution were presented as (x) ± s and analyzed by independent sample t test.Results All the 62 patients underwent operation successfully without perioperative death.The operation time,rate of intraoperative blood transfusion,length of vein resection,incidence of complications,incidence of grade 1,2,3,4,5 complication,duration of postoperative hospital stay were (325 ± 50) minutes,35.7 ％ (10/28),(25 ± 5) mm,46.4％ (13/28),14.3％ (4/28),17.9％ (5/28),14.3％ (4/28),0,0,(15 ± 7) days in the WATIMV group,and (346 ± 97) minutes,58.8％ (20/34),(24 ±5)mm,50.0％ (17/34),14.7％ (5/34),23.5％ (8/34),8.8％ (3/34),0,2.9％ (1/34),(19 ± 11) days in the c-PD + VR group,respectively,showing no significant difference between the 2 groups (t =0.866,x2 =3.283,t =0.647,x2 =0.078,1.883,t =1.666,P ＞ 0.05).The volume of intraoperative blood loss,rate of patients with intraoperative blood loss ＞ 800 mL,R1 resection rate,rate of positive margin in pancreas and retroperitoneal positive margin were (534 ± 277) mL,46.4％ (13/28),3.6％ (1/28),0,3.6％ (1/28) in the WATIMV group,and (796 ± 567) mL,67.6％ (23/34),23.5％ (8/34),8.8％ (3/34),14.7％ (5/34) in the c-PD + VR group,respectively,showing significant differences between the 2 groups (t =2.374,x2 =2.839,4.929,6.507,P ＜ 0.05).Fifty-nine patients were followed up for 15.2 months (range,8.0-23.0 months) with a follow-up rate of 95.2％ (59/62).No patient was complicated with portal vein thrombosis during the follow-up.Conclusion WATIMV is safe and feasible for treatment of tumors in the head and neck of pancreas,helping to improve radical resection rate of carcinoma and operation safety.
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Severe portal vein thrombosis (PVT) is often considered a relative contraindication for living donor liver transplantation due to high associated risks and morbidity. Meanwhile, improvement in operative techniques, resulting in higher success rates has removed PVT from the list of contraindications in deceased donor liver transplantation (DDLT). In this report, we describe a surgical technique for DDLT using polytetrafluoroethylene graft from the inferior mesenteric vein for portal inflow in patient with portomesenteric thrombosis.
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Humans , Male , Middle Aged , End Stage Liver Disease/complications , Liver Transplantation/methods , Mesenteric Veins/surgery , Polytetrafluoroethylene , Portal Vein/surgery , Tissue Donors , Treatment Outcome , Ultrasonography, Doppler , Vascular Grafting , Venous Thrombosis/etiologyABSTRACT
PURPOSE: Our aim to assess clinical significance of the relation between inferior mesenteric vein ligation and collateral blood supply (meandering mesenteric artery) to the splenic flexure with elaboration more in anatomical landmarks and technical tips. MATERIALS AND METHODS: We review the literature regarding the significance of the collateral vessels around inferior mesenteric vein (IMV) root and provide our prospective operative findings, anatomical landmarks and technical tips. We analyzed the incidence and pattern of anatomic variation of collateral vessels around the IMV. RESULTS: A total of 30 consecutive patients have been prospectively observed in a period between June 25-2012 and September 7-2012. Nineteen males and eleven females with mean age of 63 years. Major colorectal procedures were included. There were three anatomical types proposed, based on the relation between IMV and the collateral vessel. Type A and B in which either the collateral vessel crosses or runs close to the IMV with incidence of 43.3% and 13.3%, respectively, whereas type C is present in 43.3%. There was no definitive relation between the artery and vein. No intra or postoperative ischemic events were reported. CONCLUSION: During IMV ligation, inadvertent ligation of Arc of Riolan or meandering mesenteric artery around the IMV root "in type A&B" might result in compromised blood supply to the left colon, congestion, ischemia and different level of colitis or anastomotic dehiscence. Therefore, careful dissection and skeletonization at the IMV root "before ligation if necessary" is mandatory to preserve the collateral vessel for the watershed area and to avoid further injury.
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Female , Humans , Male , Middle Aged , Duodenum/anatomy & histology , Ligation/methods , Mesenteric Veins/surgery , Pancreas/anatomy & histology , Prospective StudiesABSTRACT
Pylephlebitis is defined as septic thrombophlebitis of the portal vein or one of its tributaries. Pylephlebitis is an uncommon and often fatal complication of intra-abdominal infections, such as diverticulitis and appendicitis. The most common bacteria isolated from patients with pylephlebitis are Escherichia coli and Bacteroides fragilis. The overall mortality rate is 32%. We describe a case of septic thrombophlebitis of the main portal vein and inferior mesenteric vein successfully treated with broad-spectrum antibiotics and anticoagulants. The early diagnosis and treatment with the timely administration of antibiotics is most important for pylephlebitis.
Subject(s)
Humans , Anti-Bacterial Agents , Anticoagulants , Appendicitis , Bacteria , Bacteroides fragilis , Cavernous Sinus Thrombosis , Diverticulitis , Early Diagnosis , Escherichia coli , Intraabdominal Infections , Mesenteric Veins , Portal Vein , ThrombophlebitisABSTRACT
Pylephlebitis is defined as septic thrombophlebitis of the portal vein or one of its tributaries. Pylephlebitis is an uncommon and often fatal complication of intra-abdominal infections, such as diverticulitis and appendicitis. The most common bacteria isolated from patients with pylephlebitis are Escherichia coli and Bacteroides fragilis. The overall mortality rate is 32%. We describe a case of septic thrombophlebitis of the main portal vein and inferior mesenteric vein successfully treated with broad-spectrum antibiotics and anticoagulants. The early diagnosis and treatment with the timely administration of antibiotics is most important for pylephlebitis.
Subject(s)
Humans , Anti-Bacterial Agents , Anticoagulants , Appendicitis , Bacteria , Bacteroides fragilis , Cavernous Sinus Thrombosis , Diverticulitis , Early Diagnosis , Escherichia coli , Intraabdominal Infections , Mesenteric Veins , Portal Vein , ThrombophlebitisABSTRACT
Isolated thrombophlebitis of the inferior mesenteric vein (IMV) is a rare condition, but delayed diagnosis causes severe problems and serious long-term complications. Therefore, the early diagnosis and adequate management of the underlying disease and thrombus is very important. Here, a case of a 64-year-old man with isolated IMV thrombosis on computed tomography (CT) and CT angiography due to inflammation of an abdominal organ and spell our disseminate intravascular coagulation (DIC) is reported. The patient's condition improved without complication after treatments with an anticoagulant regimen and antimicrobials. In the follow up, there was no thrombus on the CT angiograph and no sign of recurrent disease.