<prompt> Block veebrae are seen inPagets diseaseLeukemiaTBKlippel-Feil syndrome  <response>: A block veebra is a type of veebral anomaly where there is a failure of separation of two or more adjacent veebral boidesAssociationsThere is a frequent association with hemiveebraeabsent veebra above or below block level, posterior element fusionFusion of multiple cervical veebral bodies is also seen in Klipple-Feil syndrome and VACTREL anomalyRefer: Mohindras Fundamentals of Ohopedics, 2nd edition, pg no. 380 - 381 