Figure 15From: Causes of mortality and pathological lesions observed post-mortem in red squirrels (Sciurus vulgaris) in Great BritainSuspected cholecalciferol poisoning. The brown staining of the renal proximal collecting tubules basement membranes is indicative of widespread deposition of calcium and is consistent with a diagnosis of cholecalciferol poisoning. Von Kossa stain, bar = 100 mμ.Back to article page