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==Introduction==  

==Introduction==  

Mammary tumours are common in the rat. The most common tumour type is a '''benign fibroadenoma'''. Mammary tissue is extensive in the rat - extending from the neck to the flanks, so mammary neoplasia should be considered when presented with a rat with a mass within this region.<br><br><br>

[[Mammary Neoplasia|Mammary Neoplasia]] is common in the rat. The most common tumour type is a '''benign fibroadenoma'''. Mammary tissue is extensive in the rat - extending from the neck to the flanks, so mammary neoplasia should be considered when presented with a rat with a mass within this region.<br><br><br>

==Signalment==  

==Signalment==  

Mammary neoplasia can occur in both female and male rats.<br><br><br>

Mammary neoplasia can occur in both female and male rats.<br><br><br>

==Prognosis==

==Prognosis==

Prognosis is '''good''' with successful surgical excision, however it is common for the mass to '''recur''' either elsewhere or in the same location as the original mass. It is rare for the mass to become malignant.<br><br><br>

Prognosis is '''good''' with successful surgical excision, however it is common for the mass to '''recur''' either elsewhere or in the same location as the original mass. It is rare for the mass to become malignant.<br><br><br>