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By Guest ![[gb]](/images/flags/gb.png "United Kingdom")
Date 18.09.05 23:16 UTC
As far as I am aware these only occur in the womb. If you mean mammary tumours then about 40% are malignant. Any mammmary tumour should be removed and tested because of this, and the sooner the better., unless the bitch is very elderly when the status of the tumour may not be as relevant to life expectancy.
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