Retrocerebellar arachnoid cyst. Perinatal Journal 2014;22(3):SE31-32
- Zeynep Kamil Kadın Doğum Hastalıkları ve Çocuk Hastalıkları Hastanesi, Perinatoloji Kliniği- İstanbul TR
Hicran Acar Şirinoğlu, Zeynep Kamil Kadın Doğum Hastalıkları ve Çocuk Hastalıkları Hastanesi, Perinatoloji Kliniği- İstanbul TR,
Conflicts of Interest
No conflicts declared.
To present a prenatally diagnosed case of retrocerebellar arachnoid cyst and discussion of management for this case.
A 24 years old, gravida 1, parity 0 pregnant woman was referred to our unit because of fetus with retrocerebellar arachnoid cyst at 22 weeks gestation. A detailed ultrasound scan was revealed a single live fetus with cranial retrocerebellar arachnoid cyst that is 28mm*22mm in diameter, cisterna magna that is 13.18mm in diameter and normal cerebellum(5th-50thh). After genetic counseling about the fetus prognosis; amniocentesis was performed. The result of fetal karyotype was 46 XX.
Cystic anomalies are easily recognizable in the axial transcerebellar plane in the fetus. However, their differential diagnosis can be particularly diffucult. Retrocerebellar arachnoid cyst is a cerebrospinal fluıd collection and sonographically it appears as a sonolucent cystic mass. Retrocerebellar arachnoid cyst can be diagnosed by prenatal sonography into second trimester, but it should be distinquished from mega cisterna magna, Blake's pouch cyst, Dandy-Walker malformation
Retrocerebellar arachnoid cyst, prenatal diagnosis