<prompt> Sonographic finding of spina bifida a Ventriculomegalyb Obliteration of cisterna magnac Small BPDd Abnormal curvature of cerebellume Club footacdbcdabcabd  <response>: Sonographic findings of spina bifida Most common site is lumbosacral region.Ventriculomegaly with hydrocephalus.Banana sign - cerebellum is stretched around the brain stem with effacement of cisterna magna.Lemon sign - Flattening of frontal bones on transverse image.Bony defect in spine: -V shaped profile due to outward flaring of two posterior ossification centres.Presence of intact sac on posterior aspect of spine.Sac filled with fluid or solid tissue in meningocele or myelomeningocele. 