Frontal and lateral radiograph of the lumbar spine with curvature of the inferior endplate of the 4th and 5th lumbar vertebrae, which mimics the curvature of Cupid’s bow aimed cephalad. The unusual, non-flat surface of the inferior endplate is a normal variant, and need not be misinterpreted as inherent osseous abnormality or adjacent pathological process.
Reference
Dietz GW, Christiensen EE: Normal “Cupid’s Bow” contour of the lower lumbar vertebrae. Radiology 1976, 121:577-579.
