Diagnostic Ultrasound - Abdomen and Pelvis

09.07.2019 Views

Splenic Infarct (Left) Power Doppler US of the spleen in longitudinal plane shows a central, welldemarcated, wedge-shaped area of relative hypoechogenicity . There is diminished (but not absent) power Doppler signal within the area of infarct ſt. (Right) Corresponding coronal CECT in a patient with end-stage liver disease with portal hypertension marked by massive ascites and splenomegaly with central infarct . Streak artifact from metallic embolization coils present ſt (therapeutic splenic artery emobilization). Diagnoses: Spleen (Left) Rounded polar splenic infarct is shown on grayscale US. The infarcted area is hypoechoic and welldemarcated . Color Doppler (not shown) demonstrated absent flow. (Right) A mimic of splenic infarction is splenic laceration, shown here as a well-defined, hypoechoic, band-like area extending to the subcapsular region. The history of trauma is an important differentiating factor. The spleen is the most frequently injured intraperitoneal organ in patients with blunt abdominal trauma. (Left) Axial NECT shows a heavily calcified and heterogeneous spleen ſt, indicating chronic, and possibly acute, infarction. (Right) The splenectomy specimen shows a mottled spleen with capsular discoloration st that was heavily calcified on microscopy. 417

PART II SECTION 5 Urinary Tract Introduction and Overview Approach to Urinary Tract Sonography 420 Column of Bertin, Kidney 424 Renal Junction Line 426 Renal Ectopia 428 Horseshoe Kidney 432 Ureteral Duplication 436 Ureteral Ectopia 440 Ureteropelvic Junction Obstruction 444 Urolithiasis 448 Nephrocalcinosis 454 Hydronephrosis 458 Simple Renal Cyst 462 Complex Renal Cyst 466 Cystic Disease of Dialysis 470 474 Acute Pyelonephritis 476 Renal Abscess 480 Emphysematous Pyelonephritis 482 Pyonephrosis 486 Xanthogranulomatous Pyelonephritis 488 Tuberculosis, Urinary Tract 490 Renal Cell Carcinoma 494 498 Renal Angiomyolipoma 500 Upper Tract Urothelial Carcinoma 504 Renal Lymphoma 508

PART II<br />

SECTION 5<br />

Urinary Tract<br />

Introduction <strong>and</strong> Overview<br />

Approach to Urinary Tract Sonography 420<br />

<br />

Column of Bertin, Kidney 424<br />

Renal Junction Line 426<br />

Renal Ectopia 428<br />

Horseshoe Kidney 432<br />

Ureteral Duplication 436<br />

Ureteral Ectopia 440<br />

Ureteropelvic Junction Obstruction 444<br />

<br />

Urolithiasis 448<br />

Nephrocalcinosis 454<br />

Hydronephrosis 458<br />

<br />

Simple Renal Cyst 462<br />

Complex Renal Cyst 466<br />

Cystic Disease of Dialysis 470<br />

474<br />

<br />

Acute Pyelonephritis 476<br />

Renal Abscess 480<br />

Emphysematous Pyelonephritis 482<br />

Pyonephrosis 486<br />

Xanthogranulomatous Pyelonephritis 488<br />

Tuberculosis, Urinary Tract 490<br />

<br />

Renal Cell Carcinoma 494<br />

498<br />

Renal Angiomyolipoma 500<br />

Upper Tract Urothelial Carcinoma 504<br />

Renal Lymphoma 508

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