U-shaped vertebra

U-shaped vertebra

Imaging An inverted U-shaped vertebra–on an AP film, with marked flattening–and central narrowing–lateral film, which is a characteristic deformity of the lumbar vertebrae in thanatophoric dysplasia. See Cloverleaf skull, 'Telephone receiver' deformity.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.