This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
A pt presented with pulsating varicose veins of the lower limb. Most probable diagnosis is 
Select and explain. 
A. Klippel Trenaunay syndrome, B. Tricuspid regurgitation, C. DVT, D. Right ventricular failure
A: Klippel Trenaunay syndrome
Answer: A: Klippel Trenaunay syndrome 
Explanation: Ans. is 'a' ie Klippel-Trenaunay Syndrome Klippel- Trenaunay Syndrome :is characterized byCongenital AV fistulasCutaneous hemangiomasVaricose veinsHyperophy of involved extremityAbsence of deep venous system (so pathological superficial veins should not be removed without evidence of an intact deep system)*Another syndrome closely associated with A-V malformations is:Kasabach-Merritt syndrome characterised by:- thrombocytopenia* and- hemorrhagic manifestation *- d/t trapping & destruction of platelets* within the AV malformations*.