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AANS National Neurosurgical Statistics Report - 1999 Procedural Statistics

Top Reported Cranial Procedures Performed in 1999

Type of Procedures Performed	Total Procedures Performed
Cranial Procedures	220,065
Craniotomy for tumor	51,827
supratentorial	24,708
infratentorial	8,085
meninges	9,115
bone/other	1,783 +
Transsphenoidal	7,935
Craniotomy for trauma	31,262
subdural/epidural	18,657
brain injury/dural tear/ intracerebral hemorrhage	7,433
skull fx - depressed/open	4,218
CSF leak	979
Craniotomy for vascular lesion	23,704
aneurysm	13,007
intracerebral hemorrhage	7,031
vascular malformation	2,787
bypass	929
Craniotomy for seizures	4,721 +
lesion removal	2,687
mapping	2,034
Craniotomy for other	15,192
Chiari decompression	3,566
cranioplasty	6,001
infection-abscess	1,707
intercranial cyst	1,758
nerve decompression/TIC	2,235
Skull base approaches	25,571
anterior fossa	2,486
middle fossa	1,331
posterior fossa	1,707
skull base for tumor	1,758
Stereotactic	34,702
localization	14,915
aspiration/biopsy	7,960
radiosurgery	11,977
Craniofacial procedures	2,988
synostosis	2,059
extensive craniotomy	904
Intracranial Pressure (ICP) monitoring	20,163

Note: Figures and percentages may not add up to 100% due to rounding. Figures and percentages may not add up to 100% due to incomplete reported information. + Projections based from means = or < 2.5.