Management of Brain Tumors: Key Considerations

Diagnostic Approach

MRI is the gold standard for brain tumor diagnosis, not CT, due to its higher resolution and sensitivity in detecting multiple lesions when CT might only identify a single tumor 2
MRI can identify single brain metastases in approximately one-fourth to one-third of patients with brain metastases 2
T2-weighted or fluid-attenuated inversion recovery MR images are best for visualizing cerebral edema associated with brain tumors 1

Perilesional vasogenic edema commonly associated with brain tumors responds well to oral glucocorticoid steroids, according to the National Comprehensive Cancer Network 1, 2
Corticosteroids rapidly reduce cerebral edema, preventing neurologic deterioration and potentially life-threatening brain herniation 1
The European Federation of Neurological Sciences (EFNS) recommends starting dosages of dexamethasone between 4-8 mg/day 1
For patients with more acute neurologic issues, higher dosages approaching 100 mg/day in divided doses may be considered 2
Steroid dose should be tapered as quickly as clinically possible due to toxicity associated with long-term use (>3 weeks) 2

Long-term steroid use can cause personality changes, suppressed immunity, metabolic derangements, insomnia, and impaired wound healing 2
H2-receptor blockers or proton pump inhibitors should be used to prevent gastrointestinal complications in patients receiving high doses of corticosteroids, as recommended by the British Journal of Cancer 3

15-20% of patients with brain metastases present with seizures, according to the National Comprehensive Cancer Network 1
Anticonvulsants should be administered only to patients at risk for seizure, not prophylactically, as recommended by the National Comprehensive Cancer Network 1
Common first-line agents include phenytoin, carbamazepine, levetiracetam, and valproic acid 1
Non-enzyme-inducing agents are preferred to avoid interactions with chemotherapy and steroids 2
Surgical resection is indicated for diagnostic uncertainty, symptoms refractory to steroids, bulky metastases (>3-4 cm), or solitary brain metastases, according to Neuro-Oncology 4
Factors favoring craniotomy include: surgically accessible tumors, size >3 cm, need for tissue diagnosis, obstructive hydrocephalus, midline shift, and mass effect, as recommended by the National Comprehensive Cancer Network 5
Factors favoring stereotactic radiosurgery include: deep location, tumor size <3 cm, known diagnosis, and minimal mass effect, as recommended by the National Comprehensive Cancer Network 5
Radiation therapy options include brachytherapy, stereotactic fractionated RT, and stereotactic radiosurgery (SRS), according to the National Comprehensive Cancer Network 6
Whole-brain RT (WBRT) and SRS are used primarily for brain metastases, as recommended by the National Comprehensive Cancer Network 6

Brain CT is not the gold standard investigation; MRI provides superior resolution and sensitivity, according to the National Comprehensive Cancer Network 2
There is no consistent evidence that prognosis is better in females than males for brain tumors, as reported by the National Comprehensive Cancer Network 1
Both size AND site affect symptoms in brain tumors - location in eloquent areas can cause significant symptoms even with small tumors, as recommended by the National Comprehensive Cancer Network 5

Failing to taper steroids appropriately, leading to unnecessary long-term side effects, as warned by the National Comprehensive Cancer Network 2
Using prophylactic anticonvulsants in patients without seizure history, as cautioned by the National Comprehensive Cancer Network 1, 2
Delaying steroid administration in patients with significant cerebral edema, as warned by the National Comprehensive Cancer Network 1
Overlooking the need for gastric protection in patients on high-dose steroids, as recommended by the British Journal of Cancer 3