Stone-In-Neck phenomenon
Stone-In-Neck or the ‘SIN’ sign is when you see an immobile stone lodged in the gallbladder neck, without any anechoic space between the neck and the stone. It is suggestive […]
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 […]
The jellyfish sign: atelectasis
In moderate to large pleural effusions, atelectatic lung is frequently noted on the ultrasound images. Remember, when the lung is not collapsed, you would only see the artifacts (A-lines or […]
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 […]
Pneumonia versus atelectasis: the differentiation can be difficult
As mentioned before, hepatization of the lung i.e., lung looking like liver tissue can occur in both pneumonia and atelectasis. Dynamic air bronchograms, when present, point toward pneumonia but static […]
Do kidneys sweat?
An extracapsular, hypoechoic or anechoic rim of simple-appearing fluid surrounding the kidneys, first described on ultrasonography in some patients with renal failure (serum creatinine >2 mg/dL), was termed kidney sweat. […]
B lines do not always indicate pulmonary edema
Diffuse B-line pattern can be seen in pulmonary edema of various causes, interstitial pneumonia and diffuse parenchymal lung disease (e.g. fibrosis), contusion etc. Whether you are dealing with pulmonary edema […]
Ureteral jets
The intravesical ureteral jets, or the bladder jets represent the sonographic appearance of discrete boluses of urine entering the bladder, better detected using color Doppler. They are thought to result […]