Renal milk of calcium cysts
Renal milk of calcium cysts are typically asymptomatic.
Renal milk of calcium cysts are more common in the upper renal pole.
- on erect or decubitus films, renal milk of calcium cysts have a characteristic crescentic opacity with a sharp upper border
- will change shape to a more oval-shaped opacity on supine projections
- dependent echogenic material within a hypoechoic cyst that demonstrates reverberation artefact
- posterior shadowing is present when large volumes of milk of calcium are present
Treatment and prognosis
Considered an incidental benign finding that does not require further treatment unless symptomatic.
On supine plain radiographs, a renal milk of calcium cyst may be mistaken for a renal calculus. Milk of calcium can also occur within the gallbladder.
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