Conversation: The conversation between human and AI assistant.
[|Human|] Left ankle pain started Saturday & just noticed a large hard lump (at least 1 inch diameter) to left side of left knee. No knee pain.  Did a tendon break at the ankle and gather around the knee area?  Asking for a friend and will relay information tommorrow.
[|AI|]  Hello! Thank you for the query. If there was any injury recently, tendon or joint injury are possible. Lump in this area can be also a varicose vein, especially if it gets larger when standing. Painful varicose vein can indicate blood clot inside. The pain can radiate to the calf in such case and the swelling can be present. I suggest you to consult a surgeon with it. In case of doubts, soft tissues' ultrasound should be done. Hope this will help. Regards.