Haematoxylin and eosin-stained photomicrographs of gill, digestive (d), gonad (male [m] and female [f]), and foot of warty venus (V. verrucosa) specimens diagnosed with different stages of hemic neoplasia: high (N3), medium (N2), light (N1), and healthy (N0). In the N3 stage, neoplastic cells infiltrate the connective tissue and vessels of different organs (A–L), and show low infiltration of foot (C, F, I, L). In N2 stage, cell groups are observed in different organs such as gills (M) or gonad and digestive gland (N) and are not detected in the foot (O). In N1 stage, groups of neoplastic or isolated cells are detected in gill sinuses (P, S, V) and not found in either gonad and digestive gland (Q, T, W) or foot (R, U, X). N0 stage is completely devoid of any trace of hemic neoplasia at either gill, digestive gland, and gonad and foot (Y, Z, AB). Arrows show isolated cells. Asterisks show groups of neoplastic cells. Scale bar 200 µm.