ABSTRACT
This is a characteristic feature of spina bifida, often associated with a ‘banana’ shaped cerebellum due to herniation of the cerebellar vermis through the foramen magnum. The lemon shape is most often seen in the middle third of pregnancy, and often resolves in the third trimester. ‘Lemon-like’ skull without spina bifida has no clinical significance, and therefore a careful search of the spine is indicated before disregarding this finding.
