Meningohydroencephalocoele
Meningohydroencephalocoele (AmE: meningohydroencephalocele) is a form of meningocele (AmE)—a developmental abnormality of the central nervous system. Like meningocoele, meningohydroencephalocoele is caused by defects in bone ossification; in particular, the intramembranous ossification related to the closure of infantile fontanelles.
Source: Wikipedia — Meningohydroencephalocoele (CC BY-SA 4.0)