Renal Transplant Rejection
KEY FACTS Imaging • No specific imaging characteristics • Ultrasound-guided renal biopsy is gold standard • Acute rejection (AR): Nonspecific allograft edema, urothelial thickening • Resistive index (RI) may be…
Ureteral Duplication
KEY FACTS Terminology • Presence of 2 separate pelvicalyceal collecting systems draining 1 kidney, which may join above bladder (partial), drain into bladder separately (complete), or beyond bladder Imaging •…
Solid Pseudopapillary Neoplasm
KEY FACTS Terminology • Epithelial tumor of exocrine pancreas with low-grade malignant potential and solid and cystic features Imaging • Usually large (average: 10 cm; range: 2.5-20.0 cm) • Commonly…
Adenomatoid Tumor
KEY FACTS Terminology • Benign, solid paratesticular tumor of mesenchymal origin Imaging • Solid intrascrotal mass, usually extratesticular • Rounded or oval, well circumscribed, varying echogenicity • Size: 5 mm…
Bladder Diverticulum
KEY FACTS Terminology • Saccular outpouching from herniation of bladder mucosa and submucosa through muscular wall of bladder Imaging • Most commonly near ureterovesical junction • Anechoic outpouching from bladder…
Gonadal Stromal Tumors, Testis
KEY FACTS Terminology • Gonadal stromal tumors arise from nongerm cell elements Imaging • Leydig cell tumors ○ Small, solid, hypoechoic intratesticular mass ○ May occasionally show cystic change •…
Renal Transplant Pseudoaneurysm
KEY FACTS Terminology • Contained rupture secondary to defect in artery wall Imaging • Usually in renal parenchyma, rarely extrarenal • Usually ≤ 1 cm • Extrarenal pseudoaneurysm may be…
