<prompt> A patient is admitted with 3rd episode of deep venous thrombosis. There is no history of any associated medialillness. All of the following investigations are required for establishing the diagnosis exceptProtein C deficiencyAntibodies to factor VIIIAntithrombin II deficiencyAntibodies to cardiolipin  <response>: It is a cqpillary vascular malformation also called as naevus simplex. Commonly seen in 40 of new borns. It is present at birth,usually involves nape of neck,face,scalp,limbs. With age,it goes for spontaneous regression and disappears completely,usually in one year. 