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. 2014 Dec 3;33(2):157–169. doi: 10.1007/s00345-014-1444-9

Fig. 13.

Fig. 13

COD stones subtype IIa. Top stone made of small octahedral crystals of weddellite as commonly observed in patients who form stones because hypercalciuria. Bottom stone made of both small and very large crystals (arrows) of weddellite as commonly found in patients who suffered hypercalciuria, hyperoxaluria and, often mild hypocitraturia