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NEW QUESTION # 44
Which condition is demonstrated in this image?
- A. Pyocele
- B. Cryptorchidism
- C. Inguinal hernia
- D. Bell clapper deformity
Answer: B
Explanation:
The ultrasound image shows an ovoid, homogeneously hypoechoic soft tissue structure located in the inguinal canal, surrounded by echogenic fat and soft tissue. This is consistent with an undescended testis, also known as cryptorchidism.
Cryptorchidism refers to the failure of one or both testes to descend into the scrotal sac. On ultrasound, the undescended testis typically appears:
* Ovoid in shape
* Homogeneous and hypoechoic compared to scrotal testis
* Located in the inguinal canal or, less commonly, within the abdomen
* Smaller in size than a normally descended testis
Comparison of answer choices:
* A. Bell clapper deformity refers to an anatomic predisposition for testicular torsion where the tunica vaginalis surrounds the entire testis and epididymis-usually a clinical rather than directly sonographic diagnosis.
* B. Inguinal hernia appears as bowel or omentum within the inguinal canal or scrotum with peristalsis or fat-no bowel loops are seen here.
* C. Pyocele is a complex fluid collection around the testis (usually with septations and internal echoes)- not evident in this image.
* D. Cryptorchidism - Correct. The findings match those of an undescended testis in the inguinal canal.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound, 5th ed. Elsevier; 2017.
Dogra VS, Gottlieb RH, Rubens DJ, Oka M. Sonography of the scrotum. Radiology. 2003;227(1):18-36.
AIUM Practice Parameter for the Performance of Scrotal Ultrasound Examinations (2021).
NEW QUESTION # 45
Which clinical indication is most consistent with the finding depicted in this image?
- A. Focal pain
- B. Decreased range of motion
- C. Trauma
- D. Palpable abnormality
Answer: C
Explanation:
The ultrasound image shows disruption of the normal fibrillar echotexture of a muscle or tendon, consistent with a soft tissue injury such as a muscle or tendon tear. There is likely hypoechoic fluid consistent with a hematoma or edema, which commonly results from blunt or direct trauma.
This image is typical of a traumatic injury (e.g., partial or complete tendon rupture or muscle strain/tear).
These findings are frequently encountered in athletic injuries or blunt force trauma and correlate strongly with the clinical history of trauma.
Key sonographic features suggestive of trauma:
* Discontinuity or heterogeneity of normal striated muscle or tendon pattern
* Hypoechoic or anechoic area representing hematoma or fluid collection
* Retraction of muscle or tendon ends (in full-thickness tears)
* Surrounding soft tissue edema
Differentiation from other options:
* B. Focal pain: While pain may be a symptom, trauma is the more definitive and primary clinical indication for the findings shown.
* C. Palpable abnormality: May suggest a mass or cystic lesion (e.g., lipoma, abscess), not typically the appearance shown here.
* D. Decreased range of motion: May be present secondarily, but not the most consistent or primary clinical indication in this case.
References:
Bianchi S, Martinoli C. Ultrasound of the Musculoskeletal System. Springer, 2007. Chapters on Muscle and Tendon Injuries.
American Institute of Ultrasound in Medicine (AIUM) Practice Parameter for the Performance of a Musculoskeletal Ultrasound Examination, 2020.
Radiopaedia.org. Muscle tear (ultrasound):https://radiopaedia.org/articles/muscle-tear-ultrasound
NEW QUESTION # 46
Based on this image, which congenital anomaly should be suspected?
- A. Annular pancreas
- B. Supernumerary kidney
- C. Pancreas divisum
- D. Horseshoe kidney
Answer: A
Explanation:
The ultrasound image demonstrates a dilated duodenum with a hypoechoic soft tissue structure encircling it.
This is a classic sonographic appearance suggestive of an annular pancreas. In annular pancreas, pancreatic tissue completely or partially encircles the second portion of the duodenum, which can lead to duodenal narrowing or obstruction.
Annular pancreas is a congenital anomaly that results from failure of the ventral pancreatic bud to rotate properly during embryologic development. As a result, pancreatic tissue encircles the duodenum. It may present in neonates with symptoms of duodenal obstruction or in adults with abdominal pain, pancreatitis, or vomiting.
Ultrasound Findings:
* Hypoechoic pancreatic tissue encircling the duodenum
* Evidence of duodenal dilatation proximal to the obstruction
* "Double bubble" sign may be seen in neonates
Differentiation from other options:
* A. Supernumerary kidney: Refers to an accessory kidney. It would be seen in the retroperitoneum and is unrelated to the duodenum or pancreas.
* B. Pancreas divisum: A ductal anomaly best diagnosed on MRCP or ERCP. It is not typically visible on conventional ultrasound.
* D. Horseshoe kidney: A renal fusion anomaly where the lower poles of the kidneys are fused. It is seen in the pelvis or lower abdomen and does not involve the duodenum or pancreas.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Pancreas, pp. 269-272.
Radiopaedia.org. Annular pancreas: https://radiopaedia.org/articles/annular-pancreas AIUM Practice Parameter for the Performance of Abdominal and Retroperitoneal Ultrasound Examinations,
2020.
NEW QUESTION # 47
Which structures are located within the testes?
- A. Seminiferous tubules
- B. Gubernacula
- C. Efferent ductules
- D. Aberrant ductules
Answer: A
Explanation:
The seminiferous tubules are coiled structures located within the testes where spermatogenesis (sperm production) occurs. They are surrounded by Sertoli and Leydig cells that support spermatogenesis and testosterone production.
* Gubernacula (A) are fetal structures involved in testicular descent.
* Efferent ductules (B) connect the rete testis to the epididymis but are not located within the testicular parenchyma.
* Aberrant ductules (C) are accessory ducts found outside the testis.
Reference Extracts:
* Moore KL, Dalley AF, Agur AM. Clinically Oriented Anatomy. 7th ed. Lippincott Williams & Wilkins, 2013.
* Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.
NEW QUESTION # 48
Which condition is most consistent with thinning of the renal cortex, reduction in renal length, and prominence of the renal sinus fat in a patient presenting four months after renal transplant with slightly reduced renal function?
- A. Arterial stricture
- B. Chronic rejection
- C. Acute rejection
- D. Normal findings
Answer: B
Explanation:
Chronic rejection presents sonographically as cortical thinning, decreased renal size, and increased echogenicity of the renal sinus fat. Acute rejection typically causes an enlarged, edematous kidney with increased parenchymal echogenicity but preserved size early on.
According to Zwiebel's Introduction to Vascular Ultrasound:
"In chronic rejection, the allograft becomes smaller with cortical thinning, increased echogenicity, and prominence of the central sinus fat." Reference:
Zwiebel WJ, Pellerito JS. Introduction to Vascular Ultrasound. 6th ed. Elsevier, 2019.
AIUM Practice Parameter for Renal Transplant Ultrasound, 2020.
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NEW QUESTION # 49
Which condition presents sonographically as an anechoic mass between the umbilicus and the bladder?
- A. Mesenteric cyst
- B. Urinoma
- C. Bladder abscess
- D. Urachal cyst
Answer: D
Explanation:
A urachal cyst arises from incomplete closure of the urachus, a remnant of the fetal allantoic duct connecting the bladder to the umbilicus. It appears as a midline, anechoic, nonvascular mass located between the bladder dome and the umbilicus.
According to Rumack's Diagnostic Ultrasound:
"A urachal cyst is a midline, anechoic structure located between the bladder and umbilicus, resulting from incomplete obliteration of the urachus." Reference:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.
AIUM Practice Parameter for the Performance of Ultrasound of the Pelvis, 2020.
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NEW QUESTION # 50
Which outcome would be present if the sample volume gate is larger than the examined vessel?
- A. Spectral noise
- B. Aliasing
- C. Indeterminate flow direction
- D. Spike turbulence
Answer: A
Explanation:
When the sample volume (gate) is too large, it captures signals from both the vessel and surrounding tissues or adjacent flows. This leads to a broadening of the spectral waveform and produces "spectral noise" or
"spectral broadening," reducing the accuracy of velocity measurements and waveform analysis. Aliasing results from high velocity relative to the Nyquist limit, not from gate size.
According to Zwiebel's Introduction to Vascular Ultrasound:
"Increasing the sample volume beyond the vessel size causes spectral broadening, resulting in spectral noise and inaccurate Doppler measurements." Reference:
Zwiebel WJ, Pellerito JS. Introduction to Vascular Ultrasound. 6th ed. Elsevier, 2019.
AIUM Practice Parameter for Spectral Doppler Ultrasound, 2021.
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NEW QUESTION # 51
Which hernia characteristic is demonstrated in these images?
- A. Reducible
- B. Incarcerated
- C. Fat only
- D. Strangulated
Answer: A
Explanation:
The ultrasound images show two views of the same groin region - one without compression (left image labeled "W/O COMPRESSION") and one with graded probe compression (right image labeled "W/ COMPRESSION").
In the non-compression image, a hypoechoic mass-like structure is visible protruding through the abdominal wall, consistent with a hernia sac. On the compression image, the herniated content is no longer visible, indicating that the contents have been pushed back into the abdominal cavity. This is the hallmark feature of a reducible hernia.
Key characteristics of a reducible hernia on ultrasound:
* Herniated contents are visible without pressure.
* Contents disappear or reduce back into the abdomen with graded probe compression or Valsalva release.
* Typically includes omental fat or bowel, but reduction confirms lack of incarceration or strangulation.
Comparison of answer choices:
* A. Fat only refers to the hernia content type, not the behavior or reducibility shown here.
* B. Reducible - Correct. The change in hernia appearance between images demonstrates successful reduction with compression.
* C. Incarcerated hernia would remain visible and not compressible or reducible.
* D. Strangulated hernia would show signs of ischemia (bowel wall thickening, absent perfusion, hyperechoic mesentery), and would also not reduce with compression.
References:
Radswiki. Ultrasound evaluation of hernia. Radiopaedia.org
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound, 5th ed. Elsevier; 2017.
AIUM Practice Parameter for the Performance of a Focused Ultrasound Examination for Hernia (2021)
NEW QUESTION # 52
Which normal anatomical structure is also known as the accessory pancreatic duct?
- A. Duct of Vater
- B. Common pancreatic duct
- C. Duct of Santorini
- D. Duct of Wirsung
Answer: C
Explanation:
The Duct of Santorini is the accessory pancreatic duct that drains the superior portion of the pancreatic head into the minor duodenal papilla. The main pancreatic duct (Duct of Wirsung) drains into the major papilla, often joining the common bile duct at the Ampulla of Vater.
According to Moore's Clinically Oriented Anatomy:
"The accessory pancreatic duct (Duct of Santorini) may be present and drains into the minor duodenal papilla." Reference:
Moore KL, Dalley AF, Agur AMR. Clinically Oriented Anatomy. 8th ed. Wolters Kluwer, 2018.
Gray's Anatomy for Students, 4th ed., Elsevier, 2019.
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NEW QUESTION # 53
Which organ is held in place by the lienorenal, gastrosplenic, and phrenocolic ligaments?
- A. Stomach
- B. Left kidney
- C. Pancreas
- D. Spleen
Answer: D
Explanation:
The spleen is suspended in the left upper quadrant by several peritoneal ligaments, including:
* Lienorenal (splenorenal) ligament - attaches spleen to the left kidney.
* Gastrosplenic ligament - attaches spleen to the stomach.
* Phrenocolic ligament - supports the spleen inferiorly between diaphragm and colon.
These ligaments stabilize the spleen's position while allowing some mobility.
According to Moore's Clinically Oriented Anatomy:
"The spleen is connected to the stomach by the gastrosplenic ligament and to the posterior abdominal wall (near the left kidney) by the splenorenal (lienorenal) ligament. The phrenocolic ligament provides inferior support." Reference:
Moore KL, Dalley AF, Agur AMR. Clinically Oriented Anatomy. 8th ed. Wolters Kluwer, 2018.
Gray's Anatomy for Students, 4th ed., Elsevier, 2019.
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NEW QUESTION # 54
Which vessel is located directly proximal to the origination of the renal arteries?
- A. Superior mesenteric artery
- B. Hepatic artery
- C. Splenic vein
- D. Left portal vein
Answer: A
Explanation:
The renal arteries originate from the abdominal aorta just inferior to the superior mesenteric artery (SMA).
The SMA arises anteriorly from the abdominal aorta at the level of L1, and just below it, the renal arteries branch laterally. The splenic vein, portal vein, and hepatic artery are located more superiorly in relation to the renal arteries.
According to Moore's Clinically Oriented Anatomy:
"The superior mesenteric artery arises from the anterior surface of the abdominal aorta just above the renal arteries." (Moore KL et al., Clinically Oriented Anatomy, 8th ed.) Reference:
Moore KL, Dalley AF, Agur AMR. Clinically Oriented Anatomy. 8th ed. Wolters Kluwer, 2018.
Gray's Anatomy for Students, 4th ed., Elsevier, 2019.
NEW QUESTION # 55
Which finding is expected in the contralateral kidney given the pathology depicted in this image?
- A. Duplicated collecting system
- B. Atrophic kidney
- C. Polycystic kidney
- D. Parapelvic cysts
Answer: C
Explanation:
The ultrasound image shows a sagittal view of the right kidney with multiple anechoic (black), non- communicating cysts of varying sizes distributed throughout the renal parenchyma, consistent with autosomal dominant polycystic kidney disease (ADPKD).
ADPKD is a hereditary disorder characterized by the progressive development of multiple bilateral renal cysts, which leads to renal enlargement and eventual loss of function. This condition typically affects both kidneys, making bilateral polycystic involvement expected. Therefore, the same cystic appearance is anticipated in the contralateral (left) kidney as well.
Comparison of answer choices:
* A. Duplicated collecting system: This is a congenital anomaly but does not result in diffusely cystic kidneys.
* B. Polycystic kidney: Correct. Bilateral renal involvement is the hallmark of ADPKD.
* C. Parapelvic cysts: These are simple cysts located in the renal sinus and do not exhibit the diffuse pattern seen here.
* D. Atrophic kidney: Not typical in the contralateral side in ADPKD; the disease affects both kidneys symmetrically.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound, 5th ed. Elsevier; 2017.
Hagen-Ansert SL. Textbook of Diagnostic Sonography, 8th ed. Elsevier; 2017.
Torres VE, Harris PC, Pirson Y. Autosomal dominant polycystic kidney disease. Lancet. 2007;369(9569):
1287-1301.
NEW QUESTION # 56
Which of the following must be sterile for a percutaneous procedure?
- A. Transducer cover
- B. Transducer
- C. Gel within transducer cover
- D. Machine controls
Answer: C
Explanation:
In percutaneous procedures such as biopsies or drainages, maintaining a sterile field is critical to avoid introducing infection. While the transducer is covered by a sterile cover, the gel placed inside this cover (between the probe and the cover) must also be sterile, as it contacts the sterile field. The transducer itself and machine controls are not sterile but are handled appropriately to avoid field contamination.
According to the AIUM Guidelines:
"Sterile coupling gel must be used inside the sterile probe cover during all invasive or percutaneous procedures." (AIUM Guidelines for Cleaning and Preparing Ultrasound Transducers, 2021).
Reference:
AIUM Guidelines for Cleaning and Preparing Ultrasound Transducers and Equipment for Reuse, 2021.
ACR Practice Parameter for Performing Ultrasound-Guided Procedures, 2020.
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NEW QUESTION # 57
Which arteries are the immediate branches of the celiac trunk?
- A. Common hepatic, splenic, and right gastric
- B. Proper hepatic, splenic, and gastroduodenal
- C. Proper hepatic, splenic, and supraduodenal
- D. Common hepatic, splenic, and left gastric
Answer: D
Explanation:
The celiac trunk arises from the abdominal aorta and immediately divides into three primary branches:
* Left gastric artery
* Common hepatic artery
* Splenic artery
The proper hepatic and gastroduodenal arteries are secondary branches of the common hepatic artery.
According to Moore's Clinically Oriented Anatomy:
"The celiac trunk trifurcates into the left gastric, common hepatic, and splenic arteries." Reference:
Moore KL, Dalley AF, Agur AMR. Clinically Oriented Anatomy. 8th ed. Wolters Kluwer, 2018.
Gray's Anatomy for Students, 4th ed., Elsevier, 2019.
NEW QUESTION # 58
What is the most common location of a pancreatic pseudocyst?
- A. Right subdiaphragmatic space
- B. Left anterior pararenal space
- C. Left pericolic gutter
- D. Lesser sac
Answer: D
Explanation:
Pancreatic pseudocysts most commonly develop in the lesser sac, which lies between the posterior wall of the stomach and the anterior surface of the pancreas. This space allows for the accumulation of pancreatic fluid collections following pancreatitis or pancreatic ductal disruption.
* The left anterior pararenal space (B) is a secondary location.
* The right subdiaphragmatic space (C) and left pericolic gutter (D) are less common sites.
Reference Extracts:
* Mortele KJ, Wiesner W, et al."Pancreatic pseudocysts: imaging features and diagnostic difficulties." Radiographics. 2004;24(4):1005-1020.
* Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.
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NEW QUESTION # 59
What is the adrenal disorder that produces excessive secretion of aldosterone?
- A. Addison disease
- B. Waterhouse-Friderichsen syndrome
- C. Cushing disease
- D. Conn syndrome
Answer: D
Explanation:
Conn syndrome (primary hyperaldosteronism) results from excessive aldosterone secretion, often due to an adrenal adenoma, leading to hypertension, hypokalemia, and metabolic alkalosis. Cushing disease involves cortisol, Addison disease involves adrenal insufficiency, and Waterhouse-Friderichsen is associated with adrenal hemorrhage.
According to Rumack's Diagnostic Ultrasound:
"Conn syndrome is due to excessive secretion of aldosterone, often secondary to adrenal cortical adenoma." Reference:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.
AIUM Practice Parameter for Adrenal Ultrasound, 2020.
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NEW QUESTION # 60
Which type of artifact is indicated by the arrows on this image?
- A. Comet tail
- B. Speed error
- C. Edge shadow
- D. Focal enhancement
Answer: C
Explanation:
The ultrasound image of the thyroid clearly shows posterior shadowing originating from the lateral edges of a rounded structure, which is indicative of edge shadow artifact. Edge shadowing occurs when an ultrasound beam passes tangentially to a rounded or curved structure, such as a cyst or blood vessel. The difference in sound wave refraction and beam divergence at the edges leads to decreased echo signals deep to the edges, creating linear hypoechoic bands - which is exactly what the arrows are pointing to in the image.
Edge shadow artifact is purely a result of beam physics and not a real anatomic or pathologic finding.
Key characteristics of edge shadowing:
* Appears as a narrow, linear hypoechoic (dark) shadow extending deep to the edge of a curved interface (e.g., cyst, vessel, thyroid nodule)
* Caused by refraction and beam deflection, leading to reduced beam intensity distal to the edges
* Most commonly seen adjacent to cysts or fluid-filled structures
Differentiation from other options:
* A. Focal enhancement: Appears as increased echogenicity distal to a fluid-filled structure due to lower attenuation of the sound beam through fluid (opposite of shadowing).
* C. Speed error: A less common artifact that results in displacement of structures due to variation in assumed sound speed.
* D. Comet tail: A reverberation artifact that appears as a series of closely spaced bright echoes, often associated with metallic objects or cholesterol crystals in adenomyomatosis.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Ultrasound Physics and Artifacts, pp. 38-42.
Kremkau FW. Sonography Principles and Instruments. 9th Edition. Elsevier, 2015. Chapter: Image Artifacts, pp. 132-136.
NEW QUESTION # 61
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