Fifty-two spontaneous canine mammary gland tumours (fibroadenomas, n = 8, tubulopapillary carcinomas, n = 9, solid carcinomas, n = 6, anaplastic carcinomas, n = 7, fibrosarcomas, n = 9, liposarcomas, n = 9 and osteosarcomas, n = 4 were analysed by computer-assisted nuclear morphometry on Hemacolor-stained cytologic specimens. One hundred nuclei per lesion were examined. Computerized cytomorphom...