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Tag: Kidney

Questionable hydroureter seen in the clinic

A middle-aged man was seen in the nephrology clinic after a recent hospitalization for acute pyelonephritis and acute kidney injury (AKI) requiring a few sessions of dialysis. AKI was thought […]

Sonographic appearance of an ureteral stent

Here is the image of right kidney obtained from a patient with history of obstructive uropathy. Note the hyperechoic double-lined structure in the collecting system area: that’s ureteral stent. Here […]

Retroperitoneal hematoma

While performing POCUS, it is important to pay attention to what’s happening ‘around’ the kidney as well – sometimes it can save lives. Here are sonographic images obtained from a […]

The ‘double line’ sign

These images were obtained from a dialysis patient during routine screening for renal cell carcinoma. In addition to kidneys being small with thin parenchyma, note the hypoechoic, sharply demarcated area […]

Lymphomatous infiltration of the kidney

Following renal ultrasound images were obtained from a patient with diffuse large B-cell lymphoma with extensive spread all over the body including central nervous system. Indication for the study: acute […]

Horseshoe Kidney

Horseshoe kidney is the most common renal fusion abnormality characterized by fusion of one pole of each kidney, typically the lower pole. The connection or the isthmus lies in the […]

A case of bilateral hydronephrosis

A young woman presented with abdominal pain that did not get better with empiric antibiotic therapy for presumed urinary tract infection. Renal sonogram revealed bilateral mild to moderate hydronephrosis. There […]

Retroperitoneal lymphoma

Here is a renal sonogram obtained from an elderly woman demonstrating bilateral hydronephrosis as well as a heterogeneous mass encasing the left kidney. CT scan of the abdomen included for […]

Maternal Physiologic hydronephrosis in Pregnancy

Pregnancy-related hydronephrosis, more precisely physiologic maternal renal pelvis dilatation is common and the incidence is estimated to be as high as 80%. The dilatation of the pelvis and ureter typically […]

Renal abscess

A middle-aged man with diabetes mellitus type 2 presented with fever, chills and malaise. Urinalysis revealed pyuria and was positive for nitrite. Renal sonogram demonstrated a heterogeneous mass-like structure in […]

Renal angiomyolipoma

A classic angiomyolipoma (AML) has abundant fat and therefore appears hyperechoic on a sonogram, similar to the sinus fat. Acoustic shadowing may be seen in up to a 3rd of […]

Renal milk of calcium cysts

Renal milk of calcium refers to the viscous colloidal suspension of calcium salts found either within a calyceal diverticulum or within a simple renal cyst. Unlike stones, milk of calcium […]

Hypertrophic column of Bertin

The renal column of Bertin is a medullary extension of the renal cortex in between the renal pyramids. Hypertrophic column of Bertin (HCB) is a normal variant that appears as […]

Post-biopsy bleeding

Compared with biopsy of other sites, native renal biopsy has the greatest risk of post-procedure hemorrhage (1.2%). However, the incidence of major bleeding and death due to bleeding is very […]

Ultrasound signs of urolithiasis

Although sonography is less sensitive than CT for detecting kidney stones, it is the preferred initial imaging modality as there is no risk of radiation, is reproducible, inexpensive, and the […]