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ECR 2019 / C-2887
Postoperative monitoring after cryoablation of pancreatic tumors
Congress: ECR 2019
Poster No.: C-2887
Type: Scientific Exhibit
Keywords: Metastases, Cancer, Ablation procedures, Ultrasound, MR, CT, Pancreas, Oncology, Abdomen
Authors: Y. Galchina1, N. A. Karelskaya1, V. Vdovenko1, D. Ionkin1, A. zhao2, G. Karmazanovsky1; 1Moscow/RU, 2Москва/RU
DOI:10.26044/ecr2019/C-2887

Results

Duplex ultrasound showed blood flow decrease in the tumor.  

MRI in the first day after pancreatic tumor CA is poorly informative due to significant  focal edema, the area of edema overlapped the tumor. Before CA, the average apparent diffusion coefficient value in tumor was 0.96 mm2\s. On the first day, average apparent diffusion coefficient  value in tumor was 1.07 mm2\s. Fig 1.

The MRI at 3 months, 6 months showed average apparent diffusion coefficient value increase in tumor, 1.2 mm2\s and 0.94 mm2\s, respectively. Fig.2

Contrast enhanced CT showed that contrast accumulation in pancreatic tumors after CA was less pronounced than before CA. The calculated average values of contrast accumulation on the 1st day after CA in arterial, venous and delayed phases were 0.05, 0.18, 0.35, respectively.

Calculated average values of contrast accumulation after CA in the arterial, venous and delayed phases at 3 months and 6 months were 0.04, 0.17, 0.44 and 0.05, 0.22, 0.54, respectively.

Gradual narrowing of vessels lumen was noted. The size of the CA zone did not change after 3 and 6 months.

The average tumor size before CA was 38 mm. After CA at 3 months and 6 months, the average tumor size was 38 mm and 39 mm, respectively.

 

Pancreatic hypertension increased slightly. The average value of pancreatic duct diameter before CA was 6.3 mm. After CA at 3 months and 6 months values of pancreatic duct diameter were 6.3 mm and 8 mm, respectively. Fig.3

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