2025 Realistic AB-Abdomen Dumps Exam Tips Test Pdf Exam Material
Powerful AB-Abdomen PDF Dumps for AB-Abdomen Questions
NEW QUESTION # 48
Which clinical finding is most likely associated with the pathology in this image?
- A. Red currant jelly stools
- B. Olive-shaped palpable mass
- C. Bilious vomiting
- D. Fever of unknown origin
Answer: B
Explanation:
The ultrasound image shows a classic longitudinal view of a markedly thickened pyloric muscle with an elongated pyloric channel. This finding is consistent with hypertrophic pyloric stenosis (HPS), a condition most commonly seen in male infants between 2 and 8 weeks of age.
The most characteristic clinical finding associated with HPS is an "olive-shaped" palpable mass in the right upper quadrant or epigastric region, which represents the hypertrophied pylorus.
Clinical presentation of HPS includes:
* Non-bilious projectile vomiting (due to gastric outlet obstruction)
* Dehydration and weight loss
* A palpable "olive" mass on physical exam
* Visible peristalsis may be noted on the abdominal wall
Sonographic diagnostic criteria for HPS:
* Pyloric muscle thickness # 3 mm
* Pyloric channel length # 15-17 mm
* "Cervix sign" or "target sign" (transverse view)
* Failure of gastric contents to pass through the pylorus on real-time imaging Differentiation from other options:
* B. Fever of unknown origin: Not characteristic of HPS.
* C. Red currant jelly stools: Classic for intussusception.
* D. Bilious vomiting: Seen in distal duodenal or jejunal obstruction, not in pyloric stenosis (vomiting is non-bilious in HPS).
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Gastrointestinal Tract, pp. 474-479.
American College of Radiology (ACR). Appropriateness Criteria - Vomiting in Infants Up to 3 Months of Age.
Radiopaedia.org. Hypertrophic pyloric stenosis:https://radiopaedia.org/articles/hypertrophic-pyloric-stenosis
NEW QUESTION # 49
Identify the region where Doppler sampling should be performed in a young woman with severe postprandial pain.
Answer:
Explanation:
Explanation:
A ultrasound image of a person's body AI-generated content may be incorrect.
The origin of the superior mesenteric artery (SMA)
The image provided is a color Doppler ultrasound scan of the abdominal aorta and its major branches. In the center of the image, just anterior to the aorta, we see the superior mesenteric artery (SMA) arising in the sagittal plane. This is the critical area for Doppler sampling in a patient with symptoms suggestive of mesenteric ischemia.
Severe postprandial pain in a young woman may be a manifestation of median arcuate ligament syndrome (MALS) or chronic mesenteric ischemia. Both of these conditions are assessed via Doppler sampling of mesenteric vessels, specifically:
* The origin and proximal segment of the SMA
* The celiac artery (especially for MALS)
Doppler waveform analysis should assess:
* Peak systolic velocity (PSV): >275 cm/s suggests #70% SMA stenosis
* Angle correction should be aligned properly
* Sampling must be performed at the narrowest origin point (as shown in the image) This type of Doppler interrogation is typically done in both fasting and postprandial states to evaluate changes in flow and symptom correlation.
Why this area?
* The SMA is anterior to the aorta and travels inferiorly into the mesentery.
* The site shown in the image is ideal for measuring PSV and evaluating for stenosis or extrinsic compression.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound, 5th ed. Elsevier; 2017.
Moneta GL, et al. Duplex ultrasound criteria for diagnosis of mesenteric artery stenosis. J Vasc Surg. 1991.
AIUM Practice Parameter for the Performance of a Mesenteric Artery Duplex Ultrasound Examination (2020).
NEW QUESTION # 50
Which structures are located within the testes?
- A. Efferent ductules
- B. Seminiferous tubules
- C. Gubernacula
- D. Aberrant ductules
Answer: B
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 # 51
Which condition is most likely depicted in this image?
- A. Appendicitis
- B. Bowel obstruction
- C. Intussusception
- D. Diverticulitis
Answer: C
Explanation:
The ultrasound image shows a classic "target sign" or "donut sign," characterized by concentric rings of alternating echogenicity. This sonographic finding is pathognomonic for intussusception, particularly when seen in the transverse plane.
Intussusception occurs when a segment of bowel telescopes into an adjacent segment, typically in children aged 6 months to 3 years. It commonly presents with intermittent abdominal pain, vomiting, and sometimes
"red currant jelly" stools.
Key ultrasound features of intussusception:
* Target sign in transverse view (concentric rings of bowel layers)
* Pseudokidney or sandwich sign in longitudinal view
* May show intraluminal mesenteric fat or vessels dragged in with the intussusceptum Comparison of answer choices:
* A. Bowel obstruction may show dilated loops of bowel with air-fluid levels and to-and-fro peristalsis but lacks the concentric ring sign.
* B. Diverticulitis typically shows bowel wall thickening and pericolic fat stranding; not the concentric target appearance.
* C. Appendicitis may appear as a blind-ending tubular structure (>6 mm), not with concentric ring pattern.
* D. Intussusception - Correct. The image demonstrates the classic target sign seen with this condition.
References:
Coley BD. US of gastrointestinal tract abnormalities in infants and children. Radiographics. 2005;25(1):27-47.
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound, 5th ed. Elsevier; 2017.
AIUM Practice Parameter for the Performance of Pediatric Ultrasound (2021).
NEW QUESTION # 52
A lactating female presents with a tender, swollen breast, erythema, and fever. Which condition is most likely present in this image?
- A. Galactocele
- B. Ductal carcinoma
- C. Mastitis
- D. Abscess
Answer: C
Explanation:
The clinical presentation-tender, swollen breast with erythema and fever-in a lactating female strongly suggests acute mastitis. The sonographic findings support this diagnosis. In the image, the breast parenchyma shows diffuse, hypoechoic, and heterogeneous echotexture with increased vascularity, which is consistent with inflammatory changes typical of mastitis.
Mastitis is a common complication during lactation, particularly in the first few weeks postpartum. It results from milk stasis and subsequent bacterial infection, commonly due to Staphylococcus aureus. Ultrasound features of mastitis include:
* Ill-defined, hypoechoic, edematous areas in the breast parenchyma
* Increased Doppler flow due to hyperemia
* Skin thickening
* Ductal dilatation may also be present
If left untreated, mastitis may progress to abscess formation, which would appear as a localized, complex fluid collection with peripheral hyperemia and internal debris. However, the image does not show a well- formed fluid collection consistent with abscess.
Option B (Ductal carcinoma): Inappropriate here due to the acute clinical scenario and patient age. Ductal carcinoma typically presents as a hypoechoic mass with irregular margins and posterior shadowing, not diffuse edema or inflammatory changes.
Option D (Galactocele): This benign milk-filled retention cyst typically appears anechoic or with fluid-fluid levels but lacks signs of inflammation and systemic symptoms such as fever.
Option A (Abscess): This could be a differential, but abscesses usually present with a well-defined anechoic or complex mass. The absence of a discrete collection and the diffuse appearance makes mastitis more likely.
References:
Mendelson EB. Practical Ultrasound: An Illustrated Guide. Springer, 2004. Chapter: Breast Ultrasound.
American College of Radiology (ACR). ACR Practice Parameter for the Performance of a Breast Ultrasound Examination, 2022.
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Breast, pp. 1169-1175.
NEW QUESTION # 53
Which condition is most likely associated with a common bile duct measuring 5 mm?
- A. Normal
- B. Obstruction
- C. Stricture
- D. Sclerosis
Answer: A
Explanation:
A common bile duct (CBD) measuring up to 5 mm is considered normal in most patients under age 60. Some references allow for up to 6 mm, especially post-cholecystectomy or in older individuals. Significant dilation (suggestive of obstruction) typically exceeds these measurements.
According to Rumack's Diagnostic Ultrasound:
"The normal common bile duct measures up to 5-6 mm, with slight increases considered normal after cholecystectomy or with advancing age." Reference:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.
AIUM Practice Parameter for Abdominal Ultrasound, 2020.
NEW QUESTION # 54
Which vascular condition is most likely associated with the sonographic findings demonstrated in this image?
- A. Recanalized umbilical vein
- B. Median arcuate ligament syndrome
- C. Budd-Chiari syndrome
- D. Splenic artery aneurysm
Answer: A
Explanation:
The ultrasound image demonstrates a tubular, anechoic structure coursing anterior to the left portal vein and heading toward the anterior abdominal wall. This is consistent with a recanalized umbilical vein, which is an important collateral pathway that reopens in cases of portal hypertension.
Normally, the umbilical vein becomes obliterated after birth and forms the ligamentum teres. However, in the setting of significant portal hypertension, the umbilical vein may recanalize and serve as a collateral route to decompress the portal system.
Sonographic features of a recanalized umbilical vein:
* Anechoic, tubular structure in the ligamentum teres fissure
* Seen anterior to the left portal vein
* Color Doppler confirms hepatofugal venous flow
* Associated with signs of portal hypertension (e.g., splenomegaly, varices) Differentiation from other options:
* A. Budd-Chiari syndrome: Involves hepatic vein outflow obstruction; ultrasound shows absent or narrowed hepatic veins and may have caudate lobe hypertrophy.
* B. Splenic artery aneurysm: Typically visualized near the splenic hilum as a pulsatile cystic mass; Doppler shows arterial flow.
* D. Median arcuate ligament syndrome: Involves compression of the celiac axis; best assessed with Doppler showing elevated velocities on expiration.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Portal Hypertension and Collaterals, pp. 101-104.
American Institute of Ultrasound in Medicine (AIUM). Practice Parameter for the Performance of a Vascular Ultrasound Examination, 2020.
Radiopaedia.org. Recanalized umbilical vein: https://radiopaedia.org/articles/recanalised-umbilical-vein
NEW QUESTION # 55
What is the most common location of a pancreatic pseudocyst?
- A. Left anterior pararenal space
- B. Lesser sac
- C. Left pericolic gutter
- D. Right subdiaphragmatic space
Answer: B
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 # 56
Which technique may provide better visualization of the common bile duct in a patient with hepatic steatosis?
- A. Decrease overall gain
- B. Scan patient after a fatty meal
- C. Decrease transducer frequency
- D. Increase dynamic range
Answer: C
Explanation:
In hepatic steatosis (fatty liver), increased echogenicity can obscure visualization of deeper structures like the common bile duct. Lowering the transducer frequency increases sound wave penetration, allowing better visualization of deep structures despite increased liver echogenicity. Decreasing gain or increasing dynamic range primarily adjusts image brightness and contrast but does not improve penetration.
According to Rumack's Diagnostic Ultrasound:
"Lower frequency transducers are used to improve penetration and visualization of deeper structures in patients with fatty liver." Reference:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.
AIUM Practice Parameter for the Performance of Abdominal Ultrasound Examinations, 2020.
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NEW QUESTION # 57
Which change of the inferior vena cava spectral Doppler waveform is expected superior to a nonocclusive thrombus?
- A. Becomes multiphasic
- B. Increased velocity
- C. Absence of flow
- D. Dampening
Answer: D
Explanation:
In the presence of a nonocclusive thrombus, Doppler waveform above the thrombus typically shows dampened flow with loss of normal respiratory phasicity due to partial venous outflow obstruction. Complete absence of flow is typically seen with occlusive thrombus.
According to Zwiebel's Introduction to Vascular Ultrasound:
"Partial obstruction produces dampened and continuous flow patterns superior to a nonocclusive thrombus." Reference:
Zwiebel WJ, Pellerito JS. Introduction to Vascular Ultrasound. 6th ed. Elsevier, 2019.
AIUM Practice Parameter for Venous Ultrasound, 2020.
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NEW QUESTION # 58
Which vessel is located directly proximal to the origination of the renal arteries?
- A. Hepatic artery
- B. Superior mesenteric artery
- C. Left portal vein
- D. Splenic vein
Answer: B
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 # 59
Which condition is demonstrated in this image?
- A. Intussusception
- B. Pyloric stenosis
- C. Hydronephrosis
- D. Gastritis
Answer: B
Explanation:
The ultrasound image clearly demonstrates a thickened and elongated pyloric muscle with a visible channel, which is characteristic of hypertrophic pyloric stenosis (HPS). This condition is most commonly seen in male infants between 2 and 8 weeks of age who present with non-bilious projectile vomiting, dehydration, and a palpable "olive-like" mass in the right upper quadrant.
Ultrasound is the imaging modality of choice and is highly sensitive and specific for diagnosing pyloric stenosis.
Key sonographic criteria for HPS:
* Muscle thickness >3 mm
* Pyloric channel length >15-17 mm
* "Target sign" or "doughnut sign" on transverse imaging (concentric rings)
* "Cervix" or "railroad track sign" on longitudinal imaging (elongated canal with echogenic center) Differentiation from other options:
* A. Intussusception: Also shows a target sign, but it occurs in the right lower quadrant or periumbilical region, not in the gastric antrum.
* C. Hydronephrosis: Refers to dilation of the renal pelvis and calyces - not gastrointestinal.
* D. Gastritis: May show gastric wall thickening but lacks the distinct elongated, thickened pyloric muscle seen here.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Gastrointestinal Tract, pp. 474-479.
American College of Radiology (ACR) Appropriateness Criteria - Vomiting in Infants Up to 3 Months of Age.
AIUM Practice Parameter for the Performance of a Pediatric Abdominal Ultrasound Examination, 2020.
NEW QUESTION # 60
What is the innermost layer of the gut wall?
- A. Mucosa
- B. Serosa
- C. Submucosa
- D. Muscularis externa
Answer: A
Explanation:
The mucosa is the innermost layer of the gastrointestinal wall, consisting of epithelium, lamina propria, and muscularis mucosae. It is responsible for absorption and secretion. The submucosa lies just outside the mucosa.
According to Moore's Clinically Oriented Anatomy:
"The mucosa is the innermost layer of the gastrointestinal tract, responsible for nutrient absorption and secretion." Reference:
Moore KL, Dalley AF, Agur AMR. Clinically Oriented Anatomy. 8th ed. Wolters Kluwer, 2018.
Rumack CM, Diagnostic Ultrasound, 5th ed. Elsevier, 2017.
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NEW QUESTION # 61
Which disease process may cause numerous shadowing calcifications to form within the spleen?
- A. Histoplasmosis
- B. Sickle cell anemia
- C. Thalassemia
- D. Non-Hodgkin lymphoma
Answer: A
Explanation:
Histoplasmosis is a fungal infection that can lead to granulomatous disease. Chronic granulomatous infections may result in multiple splenic calcifications that appear as small echogenic foci with shadowing on ultrasound. Other infectious granulomas (e.g., tuberculosis) may present similarly.
According to Rumack's Diagnostic Ultrasound:
"Granulomatous infections such as histoplasmosis and tuberculosis may produce multiple splenic calcifications, often with shadowing." Reference:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.
AIUM Practice Parameter for the Performance of Abdominal Ultrasound Examinations, 2020.
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NEW QUESTION # 62
The absence of which sonographic finding indicates the acute process depicted in these images?
- A. Free fluid
- B. Ductal dilatation
- C. Hepatic vein thrombosis
- D. Cavernous transformation
Answer: D
Explanation:
The sonographic images depict an acute thrombotic process involving the portal venous system. The absence of cavernous transformation in the setting of portal vein thrombus indicates that the process is acute. In chronic portal vein thrombosis, collateral vessels form in the porta hepatis to bypass the obstruction, a process known as cavernous transformation.
Sonographic features suggesting acute portal vein thrombosis:
* Echogenic thrombus within the portal vein lumen
* Absence of flow on color Doppler
* Enlarged portal vein diameter early in the process
* No evidence of cavernous transformation (i.e., no serpiginous collateral vessels at porta hepatis) Cavernous transformation is a hallmark of chronic portal vein thrombosis and takes weeks to months to develop. Therefore, its absence on ultrasound supports an acute diagnosis.
Differentiation from other options:
* A. Free fluid: Non-specific and may or may not be present in hepatic vascular thrombosis.
* B. Ductal dilatation: Related to biliary obstruction, not portal or hepatic venous thrombosis.
* C. Hepatic vein thrombosis: Seen in Budd-Chiari syndrome, which affects hepatic outflow, not portal inflow.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Portal Venous System, pp. 105-108.
American Institute of Ultrasound in Medicine (AIUM) Practice Parameter for the Performance of Hepatic Doppler Ultrasound Examinations, 2020.
Radiopaedia.org. Cavernous transformation of the portal vein: https://radiopaedia.org/articles/cavernous- transformation-of-the-portal-vein
NEW QUESTION # 63
Where in the neck are most thyroid cancer recurrences found?
- A. Subauricular
- B. Ipsilateral
- C. Bilateral
- D. Contralateral
Answer: B
Explanation:
Most thyroid cancer recurrences are found in the ipsilateral neck-particularly in the central (level VI) or lateral (levels II-V) compartments on the same side as the original malignancy.
According to AIUM Practice Parameters:
"Post-thyroidectomy recurrence most frequently occurs ipsilateral to the original tumor, commonly involving regional lymph nodes." Reference:
AIUM Practice Parameter for Thyroid and Neck Ultrasound, 2020.
American Thyroid Association (ATA) Guidelines for Thyroid Cancer Management, 2015.
NEW QUESTION # 64
Which finding is indicated by the arrow in this image of the right upper quadrant?
- A. Mirror image
- B. Retroperitoneal hemorrhage
- C. Pleural effusion
- D. Ascites
Answer: C
Explanation:
The image provided is a right upper quadrant (RUQ) ultrasound-typically performed during a FAST (Focused Assessment with Sonography in Trauma) exam or for abdominal assessment. The arrow points to an anechoic (black) fluid collection seen above the diaphragm and posterior to the liver.
This fluid collection lies within the thoracic cavity, confirming the diagnosis of a pleural effusion. Pleural effusions are seen sonographically as an anechoic or hypoechoic area superior to the diaphragm in the thoracic cavity and often appear triangular or crescent-shaped. The diaphragm is visualized as a curvilinear echogenic structure separating the liver (or spleen) below from the lung space above.
Comparison of answer choices:
* A. Retroperitoneal hemorrhage would be seen in the posterior abdomen, not above the diaphragm.
* B. Pleural effusion is correct-anechoic fluid above the diaphragm is classic for this condition.
* C. Mirror image artifact occurs when liver echoes are mirrored across the diaphragm and lung-this is not a mirror artifact.
* D. Ascites collects inferior to the diaphragm and around the abdominal organs, not in the thoracic cavity.
References:
Ma OJ, Mateer JR, Blaivas M. Emergency Ultrasound, 3rd ed. McGraw-Hill; 2014.
Moore CL, Copel JA. Point-of-care ultrasonography. N Engl J Med. 2011;364(8):749-757.
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound, 5th ed. Elsevier; 2017.
NEW QUESTION # 65
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. Acute rejection
- B. Normal findings
- C. Arterial stricture
- D. Chronic rejection
Answer: D
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 # 66
Which best describes the Doppler waveform findings in this image?
- A. Tardus parvus
- B. Normal
- C. Triphasic
- D. Increased resistance
Answer: B
Explanation:
The Doppler spectral waveform shown in this image of the right testis demonstrates low-resistance, forward- flowing arterial waveforms with continuous diastolic flow - this is characteristic of normal testicular perfusion. The presence of both color Doppler flow and a resistive index (RI) of 0.66 further supports normal testicular arterial circulation.
Key Doppler features of a normal testicular waveform:
* Low-resistance waveform (RI typically 0.5-0.75)
* Continuous diastolic flow
* No reversal of flow or spectral broadening
* Color Doppler confirms uniform intratesticular vascularity
Clinical context:
* Normal testicular flow on Doppler imaging excludes testicular torsion, infarction, or significant inflammation.
* Testicular torsion would show either absent or very high-resistance (reduced or absent diastolic flow) waveform.
* Epididymo-orchitis may show hyperemia with low resistance but often presents with other gray-scale findings like heterogeneous echotexture or scrotal wall thickening.
Differentiation from other options:
* B. Increased resistance: RI >0.75 and reduced or reversed diastolic flow; may indicate impending torsion or ischemia.
* C. Tardus parvus: A slow systolic upstroke and diminished amplitude; indicates proximal arterial stenosis.
* D. Triphasic: Normal waveform in peripheral arteries, such as extremities, not seen in testicular circulation.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Male Pelvis - Testis and Scrotum, pp. 793-800.
AIUM Practice Parameter for the Performance of Scrotal Ultrasound Examinations, 2020.
Radiopaedia.org. Testicular Doppler assessment: https://radiopaedia.org/articles/testicular-doppler-assessment
NEW QUESTION # 67
Which renal anomaly is demonstrated on this image?
- A. Duplicated collecting system
- B. Pelvic kidney
- C. Crossed renal ectopia
- D. Horseshoe kidney
Answer: D
Explanation:
The ultrasound image labeled "SAG RUQ KIDNEY" demonstrates a midline sagittal view showing a renal parenchymal structure that extends across the midline anterior to the aorta and vertebral bodies, suggesting the presence of a horseshoe kidney.
A horseshoe kidney is a congenital renal anomaly in which the lower poles of both kidneys are fused across the midline by a parenchymal or fibrous isthmus. This isthmus typically lies anterior to the aorta and inferior vena cava and can be seen as a hypoechoic band of tissue crossing the midline on ultrasound.
Ultrasound findings characteristic of a horseshoe kidney:
* Abnormally low position of the kidneys in the abdomen
* Renal tissue (isthmus) bridging the lower poles anterior to the great vessels
* Renal axes may be more horizontal than usual
* Kidneys may appear closer together or "kissing" the spine anteriorly
Differentiation from other options:
* A. Duplicated collecting system: Manifests as two separate collecting systems within one kidney, often with a central renal sinus split into two - not typically midline bridging.
* B. Crossed renal ectopia: Involves one kidney crossing midline and fusing with the other on the opposite side, but they do not form a midline isthmus.
* D. Pelvic kidney: A single kidney located in the pelvis due to failed ascent - it does not appear as midline fusion of two kidneys.
References:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th Edition. Elsevier, 2018.
Chapter: Urinary Tract, pp. 215-218.
American Institute of Ultrasound in Medicine (AIUM). Practice Parameter for the Performance of an Ultrasound Examination of the Abdomen and/or Retroperitoneum. 2020.
Radiopaedia.org. Horseshoe kidney: https://radiopaedia.org/articles/horseshoe-kidney
NEW QUESTION # 68
In which position should a patient be placed when internal echoes are seen within a fluid-filled bladder?
- A. Fowler
- B. Erect
- C. Lateral decubitus
- D. Trendelenburg
Answer: C
Explanation:
Lateral decubitus positioning allows shifting of internal echoes within the bladder, helping differentiate mobile debris (such as blood clots or sediment) from adherent masses like tumors. This technique is helpful in evaluating questionable bladder filling defects.
According to Rumack's Diagnostic Ultrasound:
"Changing the patient's position, such as turning to the lateral decubitus, can help distinguish mobile debris from attached bladder wall lesions." Reference:
Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.
AIUM Practice Parameter for Bladder Ultrasound, 2020.
NEW QUESTION # 69
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