Fetal head shape in spina bifida in the second trimester.
Unequivocal narrowing of the anterior cranium, with an apparent constriction in the approximate region of the coronal sutures, in the absence of oligohydramnios is presented as a warning sign of spina bifida in the second trimester fetus. It makes detailed assessment of the spine, cerebellum, and other ultrasonographic features imperative and may justify amniocentesis.
D005260:Female; D006257:Head / Q000002:abnormalities*; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis; D016136:Spina Bifida Occulta / Q000175:diagnosis*; D014463:Ultrasonography