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Fig. 5A —67-year-old man with marginal isoechoic response and positive
hyperechoic spots in 29 x 24 mm tumor of pancreatic head. Sonograms
obtained before (A) and 15 (B), 18 (C), and 25 (D)
sec after injection of contrast agent. Peripheral region of tumor shows mild
heterogeneous enhancement and reduction of hypoechoic area on
contrast-enhanced sonography (arrowheads, A and D).
Blood vessels developing in tumor are also depicted (arrowhead,
C).
