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Daniel Gewolb, MD Profile picture
@daniel_gewolb
May 21 • 6 tweets • 5 min read Twitter logo Read on Twitter
Case of diffuse CSF seeding of tumor in this patient w/ WHO grade 4 diffuse hemispheric glioma

#NeuroTwitter #neurosurgery #Neurology #peds #futureradres @The_ASPNR #MedEd ImageImageImageImage
▶️Prospectively this mass was thought to be an embryonal tumor w/ multilayered rosettes given the marked diffusion restriction, hemorrhage, and lack of surrounding edema 🧠
Imaging:

▶️T2 shows a heterogenous slightly hyperintense mass w/ areas of hypointensity

▶️No surrounding edema/infiltrating tumor is seen on T2/FLAIR

▶️Fluid-fluid level is seen suggestive of hemorrhage (arrow) Image
▶️DWI/ADC shows restricted diffusion due to hypercellularity

▶️SWI and CT show scattered coarse calcifications

▶️T1 shows areas of intrinsic hyperintensity likely predominantly due to calcifications

▶️The tumor shows enhancement as well as a satellite lesion (arrow) ImageImageImage
🧠 Diffusion restriction, enhancement, satellite lesion, and hemorrhage suggest high grade tumor which was confirmed pathologically as a WHO grade 4 diffuse hemispheric glioma
▶️1 year post resection we see diffuse leptomeningeal disease intracranially and throughout the thecal sac

▶️The T1C+ mimics a T2 due to the marked enhancement

▶️T2 shown for comparison ImageImageImageImage

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More from @daniel_gewolb

Daniel Gewolb, MD Profile picture
May 23
Interesting case in this patient with acute right-sided weakness

#neurorad #neurotwitter #meded #Neurosurgery #Neurology @TheASNR @RSNA #medtwitter ImageImageImageImage
Can you determine the diagnosis off the CT?
▶️Initial non-con CT shows a 3cm hyperdense lobulated extra-axial mass in the expected region of the left MCA bifurcation, consistent with a giant aneurysm. There are associated peripheral calcifications

▶️ What is the cause of the surrounding hypodensity?
Read 10 tweets
Daniel Gewolb, MD Profile picture
May 22
Case of emphysematous epiglottitis in an adult

Epiglottitis is an emergency as it can potentially cause airway compromise especially in children who have smaller airways #neurotwitter #ent #peds #Neurosurgery #MedTwitter #MedEd @ASHNRSociety ImageImage
▶️In children the diagnosis can be confirmed with upright plain film. CT requires placing the patient supine which may exacerbate inspiratory strider

▶️In adults, the diagnosis may not be suspected clinically so patients may end up with a CT scan as in this case
▶️Bacterial infection typically 2/2 H. Influenza in unvaccinated children

▶️In adults, possible pathogens include Strep, Staph, and H. influ
Read 4 tweets
Daniel Gewolb, MD Profile picture
May 21
Learning case in this 40 y/o F with history of whole brain radiation as a child for brain tumor treatment
#NeuroRad #neurosurgery #Neurology @TheASNR #NeuroTwitter #meded #radres ImageImageImageImage
Brain radiation is a risk factor for the development of meningiomas …this patient subsequently developed multiple meningiomas including this large frontal meningioma Image
The mass was treated and immediate post op CT shows expected post op change with the resection cavity, some hemorrhage, and pneumocephalus Image
Read 9 tweets
Daniel Gewolb, MD Profile picture
May 19
Interesting case of complicated acute bacterial rhinosinusitis in this child with no PMH presenting w/ HA, fever & L sided weakness

#NeuroTwitter #ent #radres #neurosurgery @TheASNR @ASHNRSociety @PhilipRChapman1 #radres #futureradres ImageImageImageImage
CT shows opacification of the frontal and anterior ethmoid sinuses without evidence of cortical dehiscence

💡 In peds, infection can spread through vascular channels w/o destroying the bone ImageImage
MR shows abnormal signal filling the sinuses with associated restricted diffusion 2/2 purulent material

Post contrast we see areas of relative hypoenhancement in comparison to the normal mucosa on the contralateral side ImageImageImage
Read 9 tweets
Daniel Gewolb, MD Profile picture
Mar 27
What is the most likely diagnosis in this adolescent with seizure? 🧠

(Sorry I have no CT without)

#neurotwitter #peds #Neurosurgery #Neurology @The_ASPNR @TheASNR #MedTwitter
What is the most likely diagnosis?
Answer: Confirmed supratentorial ependymoma

Predicting tumors is incredibly challenging in the absence of specific features …some learning points on the case in 🧵
Read 8 tweets
Daniel Gewolb, MD Profile picture
Mar 27
Case of a radiation induced pseudoaneurysm in this patient with headache and AMS 🧠

Imaging in thread #Neurosurgery #Neurology #neurotwitter #radres #MedEd #MedTwitter @TheASNR ImageImageImageImage
▶️Initial head CT shows subarachnoid hemorrhage centered in the right cerebellopontine angle cistern

▶️CTA confirms an aneurysm of the right anterior inferior cerebellar artery (AICA) ImageImage
▶️MR displays and ice cream shaped enhancing mass extending through the right internal auditory canal into the cerebellopontine angle cistern, consistent with a vestibular schwannoma #icecream

▶️Careful search into the history confirms the schwannoma was treated with radiation ImageImage
Read 4 tweets

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