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Comparative study of contrast-enhanced ultrasonography (CE-US) and histopathology of surgically resected specimens in 13 patients with pancreatic carcinoma. A time intensity curve was used to determine the percentage brightness increase in cancerous and normal regions and the patients were divided into two groups, hyperperfusion, with a percentage brightness increase over 80% (n=6) and hypoperfusion, with an increase of less than 80% (n=7) on CE-US. The hyperperfusion group included well-differentiated tubular adenocarcinoma, adenosquamous cell carcinoma and acinar cell carcinoma, while all 7 patients in the hypoperfusion group had moderately differentiated tubular adenocarcinoma. Immunological staining (α-SMA and anti-CD34) of the resected specimens showed significantly higher microartery count (MAC) in the hyperperfusion group (p&lt;0.005) than in the hypoperfusion group or normal pancreas. In the normal pancreas, the mean vessel diameter was significantly higher (over 100 μm) than in the hyperperfusion group (30 μm; p&lt;0.005). It was concluded that a muscular arterial vessel density of less than 30 μm is an important factor in determining staining degree and carcinoma progression by CE-US in pancreatic carcinoma.

Contrast-Enhanced Ultrasonograpic Studies on Pancreatic Carcinoma with Special Reference to Staining and Muscular Arterial Vessels