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Questions and Answers
What is a characteristic feature of a benign renal cyst on ultrasound?
What is a characteristic feature of a benign renal cyst on ultrasound?
What is a common complication of renal cysts?
What is a common complication of renal cysts?
What percentage of renal cysts are due to benign cystic disease?
What percentage of renal cysts are due to benign cystic disease?
What is a characteristic feature of a hydatid cyst on ultrasound?
What is a characteristic feature of a hydatid cyst on ultrasound?
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What should be done if a renal cyst has an irregular outline?
What should be done if a renal cyst has an irregular outline?
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What is the typical shape of a benign renal cyst?
What is the typical shape of a benign renal cyst?
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What is the significance of multiple cysts in one kidney?
What is the significance of multiple cysts in one kidney?
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What should be done if a patient is under 50 years old and has multiple cysts in one kidney?
What should be done if a patient is under 50 years old and has multiple cysts in one kidney?
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What is the characteristic of a renal cyst on ultrasound?
What is the characteristic of a renal cyst on ultrasound?
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What is the purpose of differentiating cysts from solid renal lesions?
What is the purpose of differentiating cysts from solid renal lesions?
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What is the significance of posterior acoustic enhancement in ultrasound imaging?
What is the significance of posterior acoustic enhancement in ultrasound imaging?
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What is the differential diagnosis of a multicystic kidney?
What is the differential diagnosis of a multicystic kidney?
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What is the characteristic of a simple cyst on ultrasound?
What is the characteristic of a simple cyst on ultrasound?
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What is the significance of a lesion being anechoic on ultrasound?
What is the significance of a lesion being anechoic on ultrasound?
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What is the purpose of ultrasound imaging in renal lesion characterization?
What is the purpose of ultrasound imaging in renal lesion characterization?
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What is the characteristic of a complex cyst on ultrasound?
What is the characteristic of a complex cyst on ultrasound?
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What is a characteristic of a renal cyst on ultrasound imaging?
What is a characteristic of a renal cyst on ultrasound imaging?
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Which of the following renal lesions can be accurately recognized on ultrasound in the early stages?
Which of the following renal lesions can be accurately recognized on ultrasound in the early stages?
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What is a characteristic of a tumour on ultrasound imaging?
What is a characteristic of a tumour on ultrasound imaging?
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What is the limitation of ultrasound imaging in renal lesion diagnosis?
What is the limitation of ultrasound imaging in renal lesion diagnosis?
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What is a characteristic of a hydatid cyst on ultrasound imaging?
What is a characteristic of a hydatid cyst on ultrasound imaging?
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What happens to the ultrasound appearance of a renal angiomyolipoma as it grows?
What happens to the ultrasound appearance of a renal angiomyolipoma as it grows?
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What is the shape of a renal cyst on ultrasound imaging?
What is the shape of a renal cyst on ultrasound imaging?
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What is a characteristic of a collapsed calcified hydatid cyst on ultrasound imaging?
What is a characteristic of a collapsed calcified hydatid cyst on ultrasound imaging?
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Study Notes
Renal Cysts and Masses
- Most solid lesions are malignant, while simple cysts and most complex cysts are benign.
- Simple cysts are the most common type of focal renal lesion, and confident characterization of a lesion as a simple cyst can stop further workup.
Ultrasound Characteristics of Renal Cysts
- Renal cysts present as spherical or ovoid anechoic lesions with thin, smooth, or imperceptible walls and posterior acoustic enhancement.
- Posterior acoustic enhancement is a feature of cysts, resulting from the unattenuated sound beam, which increases brightness just posterior to the cyst.
Differential Diagnosis of Cystic Lesions in the Kidney
- Multicystic kidney: multiple, echo-free, well-circumscribed areas throughout the kidney, usually unilateral.
- Congenital polycystic kidney disease: bilateral, although the cysts may not be symmetrical.
Types of Renal Cysts
- Simple cysts: single or multiple, unilocular, smooth and rounded walls, clearly defined back wall, no internal echoes.
- Hydatid cysts: usually contain debris, often loculated or septate, calcified walls appear as a bright, echogenic convex line with acoustic shadowing.
Ultrasound Characteristics of Renal Masses
- Ultrasound cannot reliably differentiate between benign renal tumors (other than renal cysts) and malignant renal tumors.
- Renal angiomyolipoma: well-circumscribed, hyperechogenic and homogeneous mass, may undergo central necrosis with strong back wall echoes.
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Description
This quiz covers the characteristic differences between malignant and benign renal lesions, with a focus on ultrasound imaging and confident characterization of simple and complex cysts.
