Meningohydroencephalocoele (AmE: meningohydroencephalocele) is a form of meningocele (AmE)âÂÂa 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. It refers to the protrusion of the meninges between the un-fused bones, to lie subcutaneously.
Encephalocoele defects occur in approximately 1 in 2000 live births.