<unk> , formerly<unk><unk> –Weber syndrome and sometimes angioosteohypertrophy syndrome and hemangiectatic hypertrophy, is a rare congenital medical condition in which blood vessels and/or lymph vessels fail to form properly. The three main features are nevus flammeus (port-wine stain), venous and lymphatic malformations, and soft-tissue hypertrophy of the affected limb. It is similar to, though distinctly separate from, the less common Parkes Weber syndrome. The classical triad of<unk>  consists of: # vascular malformations of the capillary, venous and lymphatic vessels; # varicosities of unusual distribution, particularly the lateral venous anomaly; and # unilateral soft and skeletal tissue hypertrophy, usually the lower extremity.
Klippel–Trénaunay syndrome
Klippel–Feil syndrome
Pelger–Huët anomaly
Daentl Townsend Siegel syndrome
Wiedemann–Rautenstrauch syndrome
Prader–Willi syndrome
Langer–Giedion syndrome
Saethre–Chotzen syndrome