Bone marrow oxalosis: An unusual cause of cytopenia in end-stage renal disease; report of two cases.

Systemic oxalosis can be either primary or secondary hyperoxaluria. Oxalosis is a phenomenon in which calcium oxalate crystals deposit in various visceral organs leading to bone marrow (BM) failure and recurrent renal stones. We describe two rare cases of BM oxalosis. Hyperoxaluria is strongly associated with nephrolithiasis and nephrocalcinosis. Both the patients presented with recurrent renal stones and a variable degree of BM failure. BM oxalosis should be considered as a possible diagnosis in patients in recurrent nephrolithiasis and cytopenia.