A previously healthy 37y F comes to the physician because of leg pain for 2 days. Medications include an oral contraceptive and calcium supplementation. Ex: distal left lower extremity shows a subcutaneous, palpable, hard, cord-like structure with a 6x1 cm, warm, erythematous area just proximal to the ankle. There are scattered varicose veins in the lower extremities. what‘s this?
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