Focal congenital lipoatrophy and vascular malformation: a mild form of inverse Klippel-Trenaunay syndrome?

A 2 year-and seven month-old male boy with vascular malformation and localized soft tissue hypotrophy is reported. Such presentation could represent the mildest end of the spectrum of 'inverse' Klippel-Trenaunay syndrome, a recently proposed disorder presenting with tissue hypotrophy as opposed to partial or complete limb overgrowth of classic Klippel-Trenaunay syndrome.