Extended left colon interposition for pharyngoesophageal reconstruction using distal-end arterial enhancement

Introduction: Acute mesenteric ischemia has a high morbidity and mortality and constitutes an intraoperative challenge in the management of ischemic areas. In this context, we analyze the use of indocyanine green fluorescence to assess intestinal vascularization through 3 clinical cases. Case presentation: we present 3 clinical cases operated for acute mesenteric ischemia. Evaluation of intestinal viability is performed under infrared light after intravenous infusion of 25 mg of indocyanine green. Case 1 is a 42-year-old male with multiple antecedents of severe vascular disease, presenting with a massive acute mesenteric ischemia involving multiple intestinal segments. Fluorescence allows two adjusted bowel resections with double intestinal anastomosis. Case 2 is a 74-year-old woman with a history of non-anticoagulated atrial fibrillation who is decided to perform an urgent surgery when an esophageal, gastric and portal system pneumatosis is observed, as indirect signs of ischemia, in urgent CT. During the surgical act there is an ischemia of the terminal ileum and right colon without clear signs of involvement at the esophageal-gastric level. The assessment after administration of ICG discriminates the clear ischemic involvement from terminal ileum to ascending colon and patched in the transverse and left colon, without esophageal or gastric involvement. Case 3 is a 49-year-old woman with aortoiliac and visceral Takayasu disease and revascularization surgery of the celiac trunk. Given the increase in abdominal pain, a new CT scan demonstrates colonic pneumatosis. Urgent laparotomy shows necrosis at the level of the left colon and hypoperfusion of the cecum. The administration of ICG finds a lack of uptake of the entire colon. A subtotal colectomy with ileostomy and mucous fistula is performed. Introduction: Acute mesenteric ischemia has a high morbidity and mortality and constitutes an intraoperative challenge in the management of ischemic areas. In this context, we analyze the use of indocyanine green fluorescence to assess intestinal vascularization through 3 clinical cases. Case presentation: we present 3 clinical cases operated for acute mesenteric ischemia. Evaluation of intestinal viability is performed under infrared light after intravenous infusion of 25 mg of indocyanine green. Case 1 is a 42-year-old male with multiple antecedents of severe vascular disease, presenting with a massive acute mesenteric ischemia involving multiple intestinal segments. Fluorescence allows two adjusted bowel resections with double intestinal anastomosis. Case 2 is a 74-year-old woman with a history of non-anticoagulated atrial fibrillation who is decided to perform an urgent surgery when an esophageal, gastric and portal system pneumatosis is observed, as indirect signs of ischemia, in urgent CT. During the surgical act there is an ischemia of the terminal ileum and right colon without clear signs of involvement at the esophageal-gastric level. The assessment after administration of ICG discriminates the clear ischemic involvement from terminal ileum to ascending colon and patched in the transverse and left colon, without esophageal or gastric involvement. Case 3 is a 49-year-old woman with aortoiliac and visceral Takayasu disease and revascularization surgery of the celiac trunk. Given the increase in abdominal pain, a new CT scan demonstrates colonic pneumatosis. Urgent laparotomy shows necrosis at the level of the left colon and hypoperfusion of the cecum. The administration of ICG finds a lack of uptake of the entire colon. A subtotal colectomy with ileostomy and mucous fistula is performed. Conclusions: The fluorescence with ICG provides a better visualization of the intestinal vascularization in the AMI, and allows to determine the limits of the affected tissue to perform adjusted resections.

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MRI Features for Predicting Microvascular Invasion of Hepatocellular Carcinoma: A Systematic Review and Meta-Analysis

Liver Cancer ◽

10.1159/000513704 ◽

2021 ◽

Vol 10 (2) ◽

pp. 94-106

Author(s):

Seung Baek Hong ◽

Sang Hyun Choi ◽

So Yeon Kim ◽

Ju Hyun Shim ◽

Seung Soo Lee ◽

...

Keyword(s):

Hepatocellular Carcinoma ◽

Tumor Size ◽

Meta Analysis ◽

Diagnostic Odds Ratio ◽

Microvascular Invasion ◽

Hepatobiliary Phase ◽

Phase Imaging ◽

Arterial Enhancement ◽

Mri Features ◽

Peritumoral Enhancement

Purpose: Microvascular invasion (MVI) is an important prognostic factor in patients with hepatocellular carcinoma (HCC). However, the reported results of magnetic resonance imaging (MRI) features for predicting MVI of HCC are variable and conflicting. Therefore, this meta-analysis aimed to identify the significant MRI features for MVI of HCC and to determine their diagnostic value. Methods: Original studies reporting the diagnostic performance of MRI for predicting MVI of HCC were identified in MEDLINE and EMBASE up until January 15, 2020. Study quality was assessed using QUADAS-2. A bivariate random-effects model was used to calculate the meta-analytic pooled diagnostic odds ratio (DOR) and 95% confidence interval (CI) for each MRI feature for diagnosing MVI in HCC. The meta-analytic pooled sensitivity and specificity were calculated for the significant MRI features. Results: Among 235 screened articles, we found 36 studies including 4,274 HCCs. Of the 15 available MRI features, 7 were significantly associated with MVI: larger tumor size (>5 cm) (DOR = 5.2, 95% CI [3.0–9.0]), rim arterial enhancement (4.2, 95% CI [1.7–10.6]), arterial peritumoral enhancement (4.4, 95% CI [2.8–6.9]), peritumoral hypointensity on hepatobiliary phase imaging (HBP) (8.2, 95% CI [4.4–15.2]), nonsmooth tumor margin (3.2, 95% CI [2.2–4.4]), multifocality (7.1, 95% CI [2.6–19.5]), and hypointensity on T1-weighted imaging (T1WI) (4.9, 95% CI [2.5–9.6]). Both peritumoral hypointensity on HBP and multifocality showed very high meta-analytic pooled specificities for diagnosing MVI (91.1% [85.4–94.8%] and 93.3% [74.5–98.5%], respectively). Conclusions: Seven MRI features including larger tumor size, rim arterial enhancement, arterial peritumoral enhancement, peritumoral hypointensity on HBP, nonsmooth margin, multifocality, and hypointensity on T1WI were significant predictors for MVI of HCC. These MRI features predictive of MVI can be useful in the management of HCC.

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