ARDMS ABDOMEN REGISTRY REVIEW: 200
HIGH-YIELD Q&AS WITH VERIFIED
ANSWERS & RATIONALES
1. A patient presents with a history of chronic alcoholism and elevated AST and
ALT levels. Ultrasound reveals a diffusely echogenic liver with poor
penetration of the sound beam and compromised visualization of the
diaphragmatic borders. What is the most likely diagnosis?
A. Acute viral hepatitis
B. Cavernous hemangioma
C. Severe hepatic steatosis
D. Budd-Chiari syndrome
VERIFIED ANSWER: C. Severe hepatic steatosis
, EXPLANATION: Hepatic steatosis (fatty liver disease) increases acoustic
impedance within the parenchymal architecture. This causes a diffusely
hyperechoic liver pattern and severe attenuation of the ultrasound beam,
making deep structures like the diaphragm difficult to visualize.
2. During an abdominal sonogram, a 32-year-old female presents with an
incidental, well-defined, homogeneous, hyperechoic mass measuring 1.5 cm in
the posterior segment of the right lobe of the liver. The mass demonstrates no
internal vascularity on color Doppler. What is this mass most likely to
represent?
A. Hepatocellular carcinoma
B. Cavernous hemangioma
C. Focal nodular hyperplasia
D. Hepatic adenoma
VERIFIED ANSWER: B. Cavernous hemangioma
EXPLANATION: Cavernous hemangiomas are the most common benign
liver tumors. They characteristically appear as small (<3 cm),
homogeneous, well-circumscribed, and hyperechoic masses, most
frequently found in the subcapsular spaces of the right hepatic lobe.
3. A 54-year-old male with a history of hepatitis C presents for an ultrasound
evaluation. The sonogram reveals a highly nodular liver surface, a shrunken
right hepatic lobe, a hypertrophied caudate lobe, and a patent paraumbilical vein
within the falciform ligament. What do these structural anomalies firmly
indicate?
A. Acute hepatic congestion
B. Cirrhosis with portal hypertension
C. Polycystic liver disease
D. Von Gierke's glycogen storage disease
VERIFIED ANSWER: B. Cirrhosis with portal hypertension
, EXPLANATION: Advanced cirrhosis triggers structural remodeling of the
liver, resulting in right lobe atrophy and compensatory caudate
hypertrophy. The recanalization of the paraumbilical vein within the
falciform ligament serves as a crucial portosystemic collateral pathway in
portal hypertension.
4. An ultrasound demonstrates occlusion of the hepatic veins with absent or
reversed flow on spectral Doppler, accompanied by ascites and hepatomegaly.
Which of the following clinical syndromes matches this manifestation?
A. Courvoisier syndrome
B. Mirizzi syndrome
C. Budd-Chiari syndrome
D. Caroli disease
VERIFIED ANSWER: C. Budd-Chiari syndrome
EXPLANATION: Budd-Chiari syndrome is an uncommon condition
caused by the thrombosis or occlusion of the hepatic veins and/or the
intrahepatic inferior vena cava (IVC). It typically presents with a triad of
abdominal pain, ascites, and hepatomegaly.
5. A 45-year-old female patient presents with right upper quadrant pain.
Ultrasound shows a normal-sized liver with a geographic, well-demarcated
hypoechoic area anterior to the porta hepatis. The surrounding liver tissue is
diffusely echogenic. The intrahepatic vessels pass normally through the
hypoechoic region without mass effect. What does this hypoechoic area signify?
A. Metastatic liver disease
B. Focal fatty infiltration
C. Focal fatty sparing
D. Pyogenic hepatic abscess
VERIFIED ANSWER: C. Focal fatty sparing
EXPLANATION: Focal fatty sparing occurs in diffuse fatty livers,
typically presenting as geographic, hypoechoic zones in characteristic sites
, like anterior to the porta hepatis or adjacent to the gallbladder. It exhibits
no mass effect, and blood vessels cross the area undisturbed.
6. What is the upper normal limit for the diameter of the main portal vein in a
quiet-breathing patient when measured at the point where it crosses anterior to
the inferior vena cava?
A. 8 mm
B. 10 mm
C. 13 mm
B. 16 mm
VERIFIED ANSWER: C. 13 mm
EXPLANATION: The normal diameter of the main portal vein during
quiet respiration should not exceed 13 mm. A measurement greater than 13
mm suggests portal vein dilation, commonly associated with portal
hypertension.
7. A patient presents with a fever, an elevated white blood cell count, and right
upper quadrant tenderness following an episode of diverticulitis. Sonography
demonstrates a complex, round, thick-walled intrahepatic fluid collection
containing internal debris and dirty shadowing from gas bubbles. What does this
represent?
A. Amebic abscess
B. Pyogenic abscess
C. Echinococcal cyst
D. Hepatic cystadenoma
VERIFIED ANSWER: B. Pyogenic abscess
EXPLANATION: Pyogenic liver abscesses are bacterial collections that
often track from pelvic or abdominal infections like diverticulitis or
appendicitis. They appear as complex, thick-walled fluid masses containing
internal debris and gas, which generates dirty shadowing or ring-down
artifacts.
HIGH-YIELD Q&AS WITH VERIFIED
ANSWERS & RATIONALES
1. A patient presents with a history of chronic alcoholism and elevated AST and
ALT levels. Ultrasound reveals a diffusely echogenic liver with poor
penetration of the sound beam and compromised visualization of the
diaphragmatic borders. What is the most likely diagnosis?
A. Acute viral hepatitis
B. Cavernous hemangioma
C. Severe hepatic steatosis
D. Budd-Chiari syndrome
VERIFIED ANSWER: C. Severe hepatic steatosis
, EXPLANATION: Hepatic steatosis (fatty liver disease) increases acoustic
impedance within the parenchymal architecture. This causes a diffusely
hyperechoic liver pattern and severe attenuation of the ultrasound beam,
making deep structures like the diaphragm difficult to visualize.
2. During an abdominal sonogram, a 32-year-old female presents with an
incidental, well-defined, homogeneous, hyperechoic mass measuring 1.5 cm in
the posterior segment of the right lobe of the liver. The mass demonstrates no
internal vascularity on color Doppler. What is this mass most likely to
represent?
A. Hepatocellular carcinoma
B. Cavernous hemangioma
C. Focal nodular hyperplasia
D. Hepatic adenoma
VERIFIED ANSWER: B. Cavernous hemangioma
EXPLANATION: Cavernous hemangiomas are the most common benign
liver tumors. They characteristically appear as small (<3 cm),
homogeneous, well-circumscribed, and hyperechoic masses, most
frequently found in the subcapsular spaces of the right hepatic lobe.
3. A 54-year-old male with a history of hepatitis C presents for an ultrasound
evaluation. The sonogram reveals a highly nodular liver surface, a shrunken
right hepatic lobe, a hypertrophied caudate lobe, and a patent paraumbilical vein
within the falciform ligament. What do these structural anomalies firmly
indicate?
A. Acute hepatic congestion
B. Cirrhosis with portal hypertension
C. Polycystic liver disease
D. Von Gierke's glycogen storage disease
VERIFIED ANSWER: B. Cirrhosis with portal hypertension
, EXPLANATION: Advanced cirrhosis triggers structural remodeling of the
liver, resulting in right lobe atrophy and compensatory caudate
hypertrophy. The recanalization of the paraumbilical vein within the
falciform ligament serves as a crucial portosystemic collateral pathway in
portal hypertension.
4. An ultrasound demonstrates occlusion of the hepatic veins with absent or
reversed flow on spectral Doppler, accompanied by ascites and hepatomegaly.
Which of the following clinical syndromes matches this manifestation?
A. Courvoisier syndrome
B. Mirizzi syndrome
C. Budd-Chiari syndrome
D. Caroli disease
VERIFIED ANSWER: C. Budd-Chiari syndrome
EXPLANATION: Budd-Chiari syndrome is an uncommon condition
caused by the thrombosis or occlusion of the hepatic veins and/or the
intrahepatic inferior vena cava (IVC). It typically presents with a triad of
abdominal pain, ascites, and hepatomegaly.
5. A 45-year-old female patient presents with right upper quadrant pain.
Ultrasound shows a normal-sized liver with a geographic, well-demarcated
hypoechoic area anterior to the porta hepatis. The surrounding liver tissue is
diffusely echogenic. The intrahepatic vessels pass normally through the
hypoechoic region without mass effect. What does this hypoechoic area signify?
A. Metastatic liver disease
B. Focal fatty infiltration
C. Focal fatty sparing
D. Pyogenic hepatic abscess
VERIFIED ANSWER: C. Focal fatty sparing
EXPLANATION: Focal fatty sparing occurs in diffuse fatty livers,
typically presenting as geographic, hypoechoic zones in characteristic sites
, like anterior to the porta hepatis or adjacent to the gallbladder. It exhibits
no mass effect, and blood vessels cross the area undisturbed.
6. What is the upper normal limit for the diameter of the main portal vein in a
quiet-breathing patient when measured at the point where it crosses anterior to
the inferior vena cava?
A. 8 mm
B. 10 mm
C. 13 mm
B. 16 mm
VERIFIED ANSWER: C. 13 mm
EXPLANATION: The normal diameter of the main portal vein during
quiet respiration should not exceed 13 mm. A measurement greater than 13
mm suggests portal vein dilation, commonly associated with portal
hypertension.
7. A patient presents with a fever, an elevated white blood cell count, and right
upper quadrant tenderness following an episode of diverticulitis. Sonography
demonstrates a complex, round, thick-walled intrahepatic fluid collection
containing internal debris and dirty shadowing from gas bubbles. What does this
represent?
A. Amebic abscess
B. Pyogenic abscess
C. Echinococcal cyst
D. Hepatic cystadenoma
VERIFIED ANSWER: B. Pyogenic abscess
EXPLANATION: Pyogenic liver abscesses are bacterial collections that
often track from pelvic or abdominal infections like diverticulitis or
appendicitis. They appear as complex, thick-walled fluid masses containing
internal debris and gas, which generates dirty shadowing or ring-down
artifacts.
