Table 1.

Clinical data for 5 cases of delayed epidural pyogenic abscess after brain tumor operation.

Patient no.	Sex/age(year)	Types and sites of surgery	implant material	frontal sinus opening	Radiotherapy	Clinical manifestations	Time from tumor surgery to diagnosis(Month)	Bone flap preservation	pus culture
1	M/68	Right parieto-occipital atypical meningioma	Yes	No	Yes	Headache,unilateral limb weakness	4	Yes	Staphylococcus epidermidis
2	F/75	Left temporoparietal meningioma	Yes	No	No	Headache	1.5	No	Negative
3	M/60	Left frontal diffuse astrocytoma	Yes	Yes	Yes	Headache,fever	24	No	Pseudomonas aeruginosa
4	M/63	Right parietal lobe diffuse astrocytoma	Yes	No	Yes	Headache,unilateral limb weakness	5	No	Negative
5	M/52	Right frontotemporal glioblastoma	Yes	No	Yes	Headache	2.5	No	Staphylococcus aureus