Lanthanum in the colon

Case contributed by Dr Jayanth Keshavamurthy


Preoperative radiograph for kidney transplant. Name all the findings. Think what complications of chronic renal failure you see? Think what medications this patient may be on.

Patient Data

Age: 52
Gender: Female

A peritoneal dialysis catheter overlies the lower pelvis satisfactorily. Multiple radiopaque densities scattered throughout the colon, likely PICA and geophagia. These have increased in number on the 2 radiographs which are about one year apart.

Splenic calcified granulomas.

The right femur demonstrate postsurgical changes from previous core decompression of avascular necrosis of the right femoral head by a vascularized fibular graft. AVN both femoral heads.


Correlate with patient's history regarding Pica, and geophagia. Differential diagnosis: Lanthanum toxicity.

Case Discussion

Chart review confirms the patient was on Lanthanum for hyperphosphatemia.

What is the atomic numbers for Barium and Lanthanum? That is why it looks like as dense as Barium.

So the importance of history and chart review for medications is made here.

PlayAdd to Share

Case information

rID: 44748
Published: 3rd May 2016
Last edited: 16th Jul 2018
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.