"Petrous apicitis is less common than it once was, on account of the widespread and early use of antibiotics for acute otomastoiditis 3-4."
"T1: fluid signal (low to intermediate)"
"T2: fluid signal (hyperintense)"
"T1 C+ (Gd): peripheral enhancement"
"mucocoele of the petrous apex: uncommon"
"frank meningitis: Proteus, Pseudomonas and Staphylococcus species are usually implicated"
"frank meningitis: Proteus, Pseudomonas and Staphylococcus species are usually implicated"
"MRI is more sensitive in detecting dural thickening and enhancement as well as leptomeningitis, cerebritis and cerebral abscess."
"There is debate as to whether it represents osteomyelitis in non-pneumatised bone, or whether (and more generally accepted) a form of osteitis developing from infected and obstructed air cells in a pneumatised petrous apex (analogous to coalescent mastoiditis) 5. Approximately 30% of the population has a pneumatised petrous apex 2, but it is frequently asymmetric."