PT - JOURNAL ARTICLE AU - Pauline Schut AU - Robert M Verdijk AU - Marieke Joosten AU - Alex J Eggink TI - Prenatal diagnosis of cervical ribs by three-dimensional ultrasound in a foetus with a herniated Dandy-Walker cyst AID - 10.1136/bcr-2018-225381 DP - 2018 Nov 01 TA - BMJ Case Reports PG - e225381 VI - 11 IP - 1 4099 - http://casereports.bmj.com/content/11/1/e225381.short 4100 - http://casereports.bmj.com/content/11/1/e225381.full SO - BMJ Case Reports2018 Nov 01; 11 AB - We present a case report of a foetus with a herniated Dandy-Walker cyst and bilateral rudimentary cervical ribs. The cervical ribs were visualised prenatally by three-dimensional ultrasound and confirmed by post-termination radiography. The prevalence of cervical ribs is higher in deceased fetuses and neonates with or without structural abnormalities compared with healthy individuals and might be regarded as a marker of disadvantageous fetal development. We demonstrate that evaluation of the fetal vertebral pattern by three-dimensional ultrasonography, including the cervical region, is feasible and could provide valuable information regarding fetal and neonatal prognosis.