Diagnostic ultrasound ( PDFDrive )

250 PART II Abdominal and Pelvic Sonography
Pancreas
Stomach
LK
Spleen
Pancreas
tail
A
B
C
D
FIG. 7.85 Small, Nonhyperfunctioning Pancreatic Endocrine Tumors. (A) Transverse sonogram shows 9-mm hypoechoic nonhyperfunctioning
pancreatic endocrine tumor (arrow) discovered incidentally during an abdominal ultrasound. The pancreatic tail was removed. (B) and (C) In another
patient, gray-scale (B) and color Doppler (C) sonograms show 2-cm hypervascular pancreatic endocrine tumor indenting the superior mesenteric
artery (arrow). (D) In another patient, intraoperative ultrasound shows a 9-mm lesion (arrows) that was discovered incidentally. Marked dilation
of the pancreatic duct is noted and can be a hallmark of serotonin-secreting pancreatic endocrine tumors. Intraoperative ultrasound is considered
essential in many institutions for the surgical management of pancreatic endocrine tumors. PD, Pancreatic duct.
L
L
A
B
FIG. 7.86 Pancreatic Lipoma. (A) Transverse sonogram of almost anechoic pancreatic lipoma (L). In contrast to the usual echogenic appearance
of fat and fatty lesions, pancreatic lipomas are usually hypoechoic. (B) Computed tomography image conirms the fatty nature of the lesion.
(Courtesy of Dr. Vinay Duddlewar.)