Endoscopic nasobiliary drainage-based saline-injection ultrasound: an imaging technique for remnant stone detection after retrograde cholangiopancreatography.

Background: The purpose of this retrospective study aimed to assess the accuracy of detection of remnant common bile duct (CBD) stones by injecting saline through endoscopic nasobiliary drainage (ENBD) tubes under transabdominal ultrasound (US) guidance.

Method: Stone extraction and ENBD are regularly achieved through endoscopic retrograde cholangiopancreatography (ERCP) in patients with CBD stones. At 1-3  days thereafter, routine US studies were performed and repeated, using ENBD tubal saline injections (20-100  mL).

Contrast-enhanced ultrasound imaging characteristics of malignant transformation of a localized type gallbladder adenomyomatosis: A case report and literature review.

Gallbladder adenomyomatosis (GAM) is an acquired, reactive, tumor-like condition. Malignant transformation is extremely rare, and imaging features during contrast-enhanced ultrasound (CEUS) have not been described before. Herein, we describe a 73-year-old Asian man who had been diagnosed with gallbladder carcinoma by conventional ultrasonography (US).

Contrast-enhanced ultrasonography diagnosis of fundal localized type of gallbladder adenomyomatosis.

Background: Adenomyomatosis of gallbladder is an acquired hyperplastic lesion, characterized by focal or diffuse thickening of the gallbladder with intramural cysts or echogenic areas with comet tail on ultrasonography. But in some cases, especially in the localized fundal type of adenomyomatosis, the intramural anechoic cystic spaces are uncertainty which causes difficult to differential adenomyomatosis from GB cancer. The purpose of this study was to determine the accuracy of real-time contrast-enhanced ultrasonography(CEUS) in the diagnosis of the fundal localized type of gallbladder adenomyomatosis.

Differential diagnosis of gallbladder wall thickening: the usefulness of contrast-enhanced ultrasound.

he purpose of this study was to evaluate the usefulness of contrast-enhanced ultrasound (CEUS) in the differential diagnosis of gallbladder wall (GBW) thickening and determine the predictors of malignant GBW thickening. One hundred fifty-nine patients with GBW thickening, including 76 men and 83 women, from eight institutions were enrolled. CEUS was performed after injection of a sulfur hexafluoride microbubble-based ultrasound contrast agent.

Diagnosis of pyriform sinus fistula in children via ultrasonography.

A pyriform sinus fistula is a rare congenital abnormality of the third or fourth branchial pouch that usually affects children. We report one case of the condition; ultrasound (US) imaged a heterogeneous mass with a hypoechoic area and air bubbles representing an abscess. Although these manifestations are rare, prominent and characteristic findings on US may facilitate the diagnosis of pyriform sinus fistula.

Contrast-enhanced ultrasound versus conventional ultrasound in the diagnosis of polypoid lesion of gallbladder: a multi-center study of dynamic microvascularization.

Objective: To assess the value of contrast-enhanced ultrasound (CEUS) in the diagnosis of polypoid lesions of gallbladder (PLGs).

Methods: CEUS was performed to 116 patients (mean age, 49.6 years; range, 21-80 years) with PLGs from 8 university hospitals.

Contrast-enhanced ultrasound in the diagnosis of gallbladder diseases: a multi-center experience.

Objective: To assess the usefulness of contrast-enhanced ultrasound (CEUS) in differentiating malignant from benign gallbladder (GB) diseases.

Methods: This study had institutional review board approval. 192 patients with GB diseases from 9 university hospitals were studied.

Contrast-enhanced sonographic appearance of malignant fibrous histiocytoma in the sigmoid colon: a case report.

Malignant fibrous histiocytoma (MFH) of the sigmoid colon is extremely rare and imaging characteristics of MFH during contrast-enhanced sonography have not been described yet. Here we report the case of a 55-year-old man suffering from MFH in the sigmoid colon, with an emphasis on contrast-enhanced sonography findings.

Solid pseudopapillary tumors of the pancreas: contrast-enhanced sonographic features.

Objectives: The aims of this study were to determine the features of solid pseudopapillary tumors of the pancreas on contrast-enhanced sonography and correlate them with pathologic findings.

Methods: Five patients with solid pseudopapillary tumors of the pancreas underwent conventional sonographic, color Doppler flow imaging, and contrast-enhanced sonographic examinations. Time-intensity curves were used to calculate the contrast enhancement times, wash-out times, and enhancement patterns of the lesions.

Cystic lymphangioma of the pancreas with congenital intrahepatic duct dilatation and choledochal cyst.

Cystic lymphangioma of the pancreas is an extremely rare benign tumor of lymphatic origin. We report on a 68-year-old woman who had experienced epigastric abdominal distension and nausea for over 1 year. Sonography revealed a cystic-solid mixed mass in the head of pancreas, with intrahepatic and extrahepatic duct dilatation.

Signet-ring cell carcinoma of ampulla of Vater: contrast-enhanced ultrasound findings.

Signet-ring cell carcinoma (SRCC) of ampulla of Vater is extremely uncommon, and less than 15 cases have been reported so far in literature. It mainly occurs in elderly people (median age 57 years). We report a rare case of SRCC of the ampulla of Vater in a 38-year-old woman who presented with a small tumor at the Vater, discovered by the contrast-enhanced ultrasound (CEUS).