Sonographically ill-defined renal parenchymal mass

May Be Caused by

 Common

Acute pyelonephritis

Focal compensatory hypertrophy of kidney

Hypertrophied coumn of Bertin

Renal cell carcinoma

 Uncommon

Early tuberculosis

Hematoma

Hemorrhage

Leukemia

Lymphoma

Metastasis

Oncocytoma

Renal contusion

Renal vein thrombosis

Transitional cell carcinoma