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A member asked:
What are the symptoms of cancer and purple blotches on the back of your thighs?
A doctor has provided 1 answer
Sarcoma: This would be sort of rare, but certain types of sarcoma (kaposi's sarcoma and angiosarcoma) can cause purple discoloration of the skin. If it is an early cancer, these can be the only symptoms. I should emphasize that most purple skin splotches are not cancerous. If your doctor is suspicious, a biopsy can be helpful.
Answered 8/9/2015
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