铜中毒，血红蛋白管型，绵羊，显微照片

Photomicrograph of kidney tissue from a 2-year-old sheep with copper toxicosis. Renal tubular lumina contain dark-red granular pigmented material that represents hemoglobin casts (black arrows).Tubules affected by hemoglobin casts have necrotic epithelia resulting in attenuation of cells along the basement membrane (white arrows). Other tubules are lined by epithelia with hydropic degeneration characterized by abundant, lightly eosinophilic, lacy cytoplasm (yellow arrows). G, glomerulus. Magnification 200X.