This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Venous Disorders, Subject name: Surgery
[{'content': 'A patient presented with pulsating varicose veins of the lower limb. On examination, he was having cutaneous hemangioma involving the face with enlarged toes. Most probable diagnosis is: \nSelect and explain. \nA. Klippel-Trenaunay syndrome, B. Tricuspid regurgitation, C. DVT, D. Kasabach-Merritt syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pulsating varicose veins + cutaneous hemangioma + enlarged toes - indicates AV Fistula or AV malformation. KLIPPEL- TRENAUNAY SYNDROME Characterized by Congenital AV fistulaQ Cutaneous hemangiomaQ Varicose veinsQ Hyperophy of involved extremityQ Absence of deep venous systemQ KASSABACH- MERRITT SYNDROME ThrombocytopeniaQ Microangiopathic hemolytic anemiaQ Consumptive coagulopathyQ Enlarging vascular lesion (Hemangioma or AV malformationQ) Investigation of choice for evaluation of peripheral AV malformation is MRI', 'role': 'assistant'}]