Neurosurgery
Physician insights on operative techniques, spinal disorders, neuro-oncology, cerebrovascular disease, and functional neurosurgery.
Recent Discussions
When do you consider hemispherectomy for patients with Rasmussen encephalitis with stable epilepsy and preserved function of the affected half of body?
Depends on several factors. First, how debilitating are the seizures? If the person cannot function, like going to school for children or adult activities, then surgery to stop the seizures should be considered. Also, age is a factor. Children under the age of 5 years should be considered to make us...
How would you manage a CVST secondary to a traumatic brain injury with the presence of intracranial hemorrhage?
When dealing with CVST after TBI, the mechanism of injury is not the same as a spontaneous CVST. There is often direct injury to the vein or the area overlying it. Given that these patients often have other traumatic injuries, and given the lack of clear evidence to support one therapy or another, I...
In patients with confirmed hypercortisolism with a high/normal unsuppressed ACTH who have both a pituitary adenoma and adrenal adenoma identified on imaging, can you reliably use DHEA-S to determine the source of cortisol production?
There is a difference between high-normal and unsuppressed ACTH. If ACTH is high-normal, this is ACTH-dependent Cushing. However, you can have mild adrenal Cushing without fully suppressed ACTH (e.g., ACTH in the 10-20 pg/ml range and sometimes even above 20). I don't think you can rely on DHEAS in ...
Under what circumstances would you consider transitioning back to a ventricular peritoneal shunt from a ventricular-pleural shunt?
If a VPleural shunt is working and well tolerated, there is generally no reason to move it, as for many older patients (usually beyond early childhood) these shunt are well tolerated with no long term complications. If there are recurrent issues, such as pleural effusions or a patient with poor resp...
At what point do you consider referring for neuromodulatory treatments (TMS, deep brain stimulation) for treatment refractory-OCD?
This is a fantastic question! Although I do not use a standardized "protocol" to determine when to refer for TMS or DBS, I typically think about this in terms of (a) medication trials, (b) comorbidities, and (c) OCD severity.Medication TrialsI would only consider TMS after trialing multiple serotone...
Do you routinely obtain a biopsy of a presumed meningioma prior to SRS to confirm grade 1?
There is an emerging and growing body of data using various AI tools and radiomics analysis, as well as the incorporation of advanced imaging, that aim to improve the ability to predict the grade of meningioma. Most of this work remains "limited institution" in terms of applicability. In the current...
How long after resection for brain metastasis do you wait to request a radiation planning MRI?
This is a good question, and I agree with the sentiments above. I think there are two competing issues here--1) evolution of the cavity and 2) regrowth of microscopic disease.While intuitively, one might think that waiting longer might allow the brain to normalize and the cavity to shrink, our data ...
How would you approach a patient with recurrent grade 3 oligodendroglioma (MGMT-methylated, IDH mutant, 1p/19q co-deleted) 1 year after gross total resection and adjuvant chemotherapy and radiation?
There are multiple options to consider for the recurrence of grade 3 gliomas after prior chemotherapy or radiation. Regardless of whether or not the recurrence overlaps completely or partially with the prior treatment fields, options include systemic therapy (including IDH-targeted therapies for IDH...
For primary CNS lymphoma, when do you refer for whole brain radiation therapy (WBRT)?
When data are limited, consensus guidelines tend to rely on the personal clinical experiences of the guideline committee members. That may explain the NCCN guidelines. Recently, remarkable progress has been noted in the treatment of CNS lymphoma with drugs alone. Ibrutinib is particularly effective ...
How do you counsel glioblastoma multiforme patients on which types of clinical trials to pursue?
This is a great question! In general, I think that a clinical trial gives someone access to promising therapies (and of course glioblastoma is an aggressive tumor for which we have no cure), but enrolling in one may not feel like the right decision for all patients (for a variety of reasons). I thin...