"In patients with suspected intraparenchymal sepsis, pre- and post-contrast scans should be obtained, unless the plan is to proceed to MRI regardless of the CT findings. Typical appearances include:"
"MR perfusion: rCBV is reduced in the surrounding oedema cf. to both normal white matter and tumour oedema seen in high-grade gliomas 2"
"MR spectroscopy: elevated peaks are seen corresponding to lipids/lactate, succinate, acetate, and amino acids (alanine, valine, leucine, and isoleucine) 14"
"pulmonary AVM and AVFs (e.g. as seen in hereditary haemorrhagic telangiectasia (HHT))"
"Streptococcus spp.: most common organism (35-50%) 3,21"
"especially the Streptococcus anginosus group which are part of normal oral flora"
"Staphylococcus aureus: especially following neurosurgery"
"Staphylococcus epidermidis: especially following neurosurgery"
"Listeria monocytogenes: especially in pregnant women and older patients"
"Fusobacterium nucleatum: part of normal oral flora 15,21"
"Proteus spp. 21"
"Bacteroides spp. 21"
"Klebsiella pneumoniae 21"
"Pseudomonas spp.: possibly especially in neonates 21"
"Toxoplasma gondii"
"Nocardia asteroides"
"Candida albicans"
"Listeria monocytogenes"
"Mycobacterium spp."
"Aspergillus fumigatus"
"Streptococcus spp.: most common organism (35-50%) 3,21"
"Staphylococcus aureus: especially following neurosurgery"
"Staphylococcus epidermidis: especially following neurosurgery"
"Listeria monocytogenes: especially in pregnant women and older patients"
"Fusobacterium nucleatum: part of normal oral flora 15,21"
"Proteus spp. 21"
"Bacteroides spp. 21"
"Klebsiella pneumoniae 21"
"Pseudomonas spp.: possibly especially in neonates 21"
"Toxoplasma gondii"
"Nocardia asteroides"
"Candida albicans"
"Listeria monocytogenes"
"Mycobacterium spp."
"Aspergillus fumigatus"
"Mycobacterium spp."
Expected headings
"Microbiology"
"pulmonary AVM and AVFs (e.g. as seen in hereditary haemorrhagic telangiectasia (HHT))"
"metastasis or high-grade glioma (e.g. glioblastoma)"
"peripheral or patchy restricted diffusion may also be seen; this finding is however not as constant as one may think, with up to half of the rim-enhancing lesions demonstrating some restriction not proving to be abscesses"
"MR spectroscopy: elevated peaks are seen corresponding to lipids/lactate, succinate, acetate, and amino acids (alanine, valine, leucine, and isoleucine) 14"