A member asked:

Painful lump on back of knee. small bruise thats got bigger and darker over the days. i have prothrombin gene mutation. not in any pain. ?

A doctor has provided 1 answer

Exam needed: This may be a Baker's cyst that ruptured. Superficial phlebitis is another possibility. Your physician or an orthopedic surgeon should examine this lump for diagnosis and treatment advice. An ultrasound may be ordered.

Answered 5/16/2018

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