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Competely excised grade II mast cell tumors and radiation therapy
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A common treatment protocol: if a cutaneous mast cell tumor is diagnosed, it is excised as soon as possible, with wide margins, and after the surgery an adjuvant radiation therapy is started. This might not be indicated in the majority of dogs with complete surgical excision, as this interesting study illustrates...
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A retrospective study was performed on 31 dogs with completely excised, grade II, cutaneous mast cell tumors in order to determine recurrence rates and sites.
Distant tumor recurrence developed in 22% of dogs, and local tumor recurrence developed in 11% of dogs; however, the vast majority of these animals were incompletely staged initially.
Complete surgical excision of grade II mast cell tumors was associated with effective local control in 89% of these dogs.
Therefore, adjuvant radiation therapy might not be indicated in the majority of dogs with complete surgical excision.
Source: Weisse C, Shofer FS, Sorenmo K. (2002): Recurrence rates and sites for grade II canine cutaneous mast cell tumors following complete surgical excision. In: J Am Anim Hosp Assoc. 2002 Jan-Feb;38(1):71-3.
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