<prompt> Block veebrae are seen in -Pagets diseaseLeukemiaTBKlippel - Feil syndrom  <response>: Features of Klippel Feil syndrome: Fusedblock veebra. hemiveebra spina bifida occulta scoliosis atlas occipitalization associated with sprengels deformity Also know Klippel Trenaunay syndrome : Klippel-Trenaunay syndrome presents with a classic triad of hemi-hyperophy, po wine stain, and congenital venous or venolymphatic malformations. This entity should be distinguished from Parkes-Weber syndrome, which is similar, but features formation of aeriovenous malformations leading to high output cardiac failure and no lymphatic malformations. 