Ultrasound in Superficial Thrombophlebitis: Clarifying Undifferentiated Leg Pain and Erythema.

Superficial thrombophlebitis (STP) is a vascular condition that can mimic deep-vein thrombosis (DVT) and cellulitis, necessitating careful evaluation to guide management. This case report describes the case of a 78-year-old female with a history of recurrent DVT who presented with lower extremity pain and erythema after discontinuing anticoagulation. Point-of-care ultrasound revealed a superficial venous thrombus with noncompressibility, confirming STP, while additional imaging identified chronic thrombi in the deep venous system.