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Case 5:
History:
A small nodule present in the right caudal mammary gland
of a Poodle bitch, aged 8 years.
Gross pathology:
The mass was well circumscribed, about 10 mm across, very form and
had several irregular pearly white areas within it.
Appearance of normal involuted
mammary tissue
Well circumscribed mixtures of
cartilage and bone comprised most of the tumour
Small nest of glandular tissue
buried in myoepithelial and stromal elements containing bone and cartilage.
(cartilage not seen on this slide)
Mixed mammary tumours:
Benign mammary tumours comprise about 80% of all mammary
tumours in dogs, and they are usually of the mixed type.
The epithelial component appears to arise form the ductular elements.
Stromal components contain variable amounts of cartilage, bone, fibrous
tissue and myoepithelial tissue, the latter which may become myxomatous.
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