Transverse section of pancreas.
These ultrasound images show the normal pancreas in a young adult. It is seen as a thin strip of tissue, of about the same echogenicity (isoechoic) as the liver, and measures 10 to 14 mm. in thickness at the neck and body.
The above sonographic images of the pancreas in a middle aged patient show marked increase in the echogenicity of the pancreas, making it hyperechoic to the liver. This is the result of a combination of age related fatty change within this organ. There is also evidence of fatty change of the liver.
This patient presented with . Ultrasound images reveal a large cystic collection with thickened and shaggy walls, located anterior to left kidney and in close relation to tail and body of the pancreas. These ultrasound findings suggest a diagnosis of pseudocyst of the pancreas. The pancreas may show calcific lesions (not visualized here) in such cases. Images courtesy of Dr. Gunjan Puri, Surat, India.
Reference: 1) http://www.emedicine.com/med/topic2674.htm (free article)
This was a young adult female patient. Sonography shows a cystic mass (3.5 x 3.9 cms.) having shaggy, thick walls in relation to the head of the pancreas. Some particulate debris is present in the dependent part of the cystic mass, but septae are absent. Color Doppler images of the cyst reveal absence of color flow within the cyst ruling out a vascular mass. These ultrasound imaging findings favor a diagnosis of pseudocyst of the pancreas. Pseudocysts are the commonest cause of cystic lesions of the pancreas and are formed as a result of extravasation of pancreatic enzymes into the surrounding spaces. These pancreatic enzymes produce strong inflammatory exudative response from the adjacent peritoneal membranes with fluid sealed within a collagenous wall (of the cyst). These ultrasound images are courtesy of Dr. Vikas Shukla, MD, India.Back to top
This elderly female patient presented with obstructive . Sonography showed intrahepatic biliary duct dilatation with markedly dilated CBD (common) with a 2 cms. sized hypoechoic mass in the head of the pancreas. Abrupt termination of the CBD at the level of the pancreatic head mass was noted, suggesting that this mass was the cause of the dilated CBD. The main pancreatic duct appeared normal. These ultrasound imaging findings are typical of a pancreatic carcinoma. The main differential diagnoses in such cases are chronic or acute pancreatitis. Ultrasound images of pancreatic carcinoma are courtesy of Dr. Prasenjeet Sngh, MD, India.
This was again an elderly female patient who presented with obstructive jaundice of unknown etiology. Sonographic imaging of the liver shows dilated intrahepatic biliary tree with a dilated Common duct (13 to 14 mm. in diameter). The color Doppler study of the intrahepatic part of the biliary tree shows the absence of color Doppler signals (absence of color) in the biliary tree as opposed to the color signals in the hepatic and portal vein branches. This is also seen in the common bile duct which also shows no color as opposed to the portal vein which shows intense color. This enables easy identification of the biliary tree from the blood vessels. The reason is because of the sluggish flow of bile in the biliary ducts (with no color signals) as compared to the rapid blood flow within the portal and hepatic veins (producing intense color signals). Ultrasound image of the pancreas shows a hypoechoic mass of 15 mm. in the head of the pancreas with the CBD abruptly terminating at this level. These ultrasound and color Doppler images suggest carcinoma (cancer) of the head of the pancreas with common bile duct obstruction. The commonest malignancy of the pancreas is adenocarcinoma of the pancreatic ducts (90 % of pancreatic cancers). This patient will be further investigated by endoscopic ultrasonography and CT scan imaging. The liver in this patient did not show evidence of metastases.
Transverse section image of dilated MPD: Ultrasound image- dilated MPD:
This adult patient had a history of acute pancreatitis some time ago. On following up this case, sonography of the pancreas showed a markedly dilated main pancreatic duct (MPD) measuring 15 mm. in width. One of the sequelae of acute/ is fibrosis of part or whole of the pancreas, and resultant obstruction to the pancreatic duct. In the images above, the obstruction to the main pancreatic duct has occurred at the head of pancreas. Such changes in the pancreas are also present in chronic obstructive pancreatitis. Ultrasound images are courtesy of Dr. Prasenjeet Singh, MD, India.
http://radiographics.rsna.org/content/29/4/1003.full (free article and images)
Ultrasound image- dilated pancreatic duct: Calculus in pancreatic duct:
This middle aged lady had h/o dyspepsia for which sonography of the pancreas was done. Ultrasound images show markedly dilated main pancreatic duct (5 mm.) with a calculus (stone) seen as an echogenic nidus in the terminal part of the main pancreatic duct, within the head of pancreas. Pancreatic duct calculi are seen within the main pancreatic duct whilst echogenic foci in the pancreatic gland itself are called calcifications. Both pancreatic calcification and calculi are usually the result of chronic pancreatitis and are more common in alcoholics. Ultrasound images of pancreatic duct calculus are courtesy of Dr. Prasenjeet Singh, MD, India.