Correspondence

Stones in Primary Hyperoxaluria — A Clarification

N Engl J Med 2009; 360:1680April 16, 2009

Article

To the Editor:

We wish to clarify information published in our letter on primary hyperoxaluria, which recently appeared in the Journal (July 3, 2008, issue).1 We had previously published an article concerning oxalate stones in the Journal of Nephrology.2 Thirteen of the cases from our earlier report were included in the 74 cases described in our letter to the Journal, whereas 61 of the 74 cases (82%) were new. Our letter focused on the very peculiar stone morphologic characteristics at the micrometer level, as demonstrated by scanning electron microscopical examination. No images are duplicates of previously published material. In the recent letter, we did not reference our earlier report and apologize for that omission.

Michel Daudon, Ph.D.
Paul Jungers, M.D.
Necker Hospital, 75015 Paris, France
michel.daudon@nck.aphp.fr

Dominique Bazin, Ph.D.
Paris-Sud University, 91405 Orsay, France

2 References

1
Daudon M, Jungers P, Bazin D. Peculiar morphology of stones in primary hyperoxaluria. N Engl J Med 2008;359:100-102
Full Text | Web of Science | Medline

2
Daudon M, Estepa L, Lacour B, Jungers P. Unusual morphology of calcium oxalate calculi in primary hyperoxaluria. J Nephrol 1998;11:Suppl 1:51-55
Web of Science | Medline

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