Flash information
- Observation
- An echogenic focus casts a posterior shadow.
- Limitation
- A stone does not automatically mean obstruction.
Definition
Central stone with posterior acoustic shadowing.
Reading method
Locate the bright focus and shadow behind it.
Morphological description
An echogenic focus casts a posterior shadow.
Source context
The source reports no hydronephrosis here.
Differential diagnoses
Distinguish stones from other echogenic foci.
Clinical correlation
Correlate symptoms and assess obstruction.
Clinical impact
Fever with suspected obstruction is concerning.
Pitfalls and limitations
A stone does not automatically mean obstruction.
Take-home message
Assess shadow and collecting system.
Sources
Documentary review: 2026-10-14
Media source & rights
- Author
- Kristoffer Lindskov Hansen, Michael Bachmann Nielsen and Caroline Ewertsen
- Original source
- Kristoffer Lindskov Hansen, Michael Bachmann Nielsen and Caroline Ewertsen · Calcul rénal avec ombre acoustique · CC BY 4.0
- Licence
- CC BY 4.0
- Changes
- Whole image retained; proportional resize and WebP conversion only. No clinical alteration. Derivative retains the original licence.
- Dimensions
- 960 × 780 px
- Check
- 2026-10-14