Basiparallel tomography to diagnosis of an extraaxial mass in the posterior fossa.
D000368:Aged; D001932:Brain Neoplasms / Q000000981:diagnostic imaging*; D003388:Cranial Fossa, Posterior; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011011:Pneumoencephalography / Q000379:methods*; D012886:Skull; D014056:Tomography, X-Ray / Q000379:methods*