Gross echinococcal cyst features. A Representative images of white (I), yellow (II), calcified (III), haemorrhagic (IV) and mixed white/yellow (V) germinal/laminated layer colours. B Representative images of ECs with one chamber (I) or multiple chambers (II). C Representative image of a yellow-coloured EC with a haemorrhagic patch. EC: Echinococcus cyst.