[Acute tension pneumocephalus as a complication of surgical procedures of the posterior cranial fossa in prone position].

The authors describe a case of acute tension pneumocephalus (TP) developing as a complication of an operation in the posterior cranial fossa, in a boy aged 3 years with a large cystic tumour of the vermis, operated on in prone position with flexed head. The authors discuss the circumstances leading to development of tension pneumocephalus.