Rosette Pattern Brain Tumor! - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
Home
USMLE Articles
USMLE News
USMLE Polls
USMLE Books
USMLE Apps
Go Back   USMLE Forums > USMLE Step 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 11-02-2011
USMLE Forums Guru
 
Steps History: 1+CK+CS
Posts: 333
Threads: 162
Thanked 282 Times in 146 Posts
Reputation: 292
Neuro Rosette Pattern Brain Tumor!

The MRT of a 16-year-old male with severe headache, vomiting and bilateral Babinski sign is shown below. Biopsy of the lesion also demonstrated a rosette pattern with the cells arranged about central vascular space. Which of the following statement is not correct?

A) The tumor is histologically benign.
B) The common location of the tumor is the fourth ventricle.
C) The tumor may lead to hydrocephalus.
D) The tumor is usually surgically removed.
E) Peak incidence of the disease is childhood and adolescence.

Rosette Pattern Brain Tumor!-mrt.jpg
click image to enlarge

Rosette Pattern Brain Tumor!-biopsy.jpg
click image to enlarge
Reply With Quote Quick reply to this message
The above post was thanked by:
Gulara (11-03-2011), MANIAKOS (11-03-2011), ThePretender (11-26-2011), zohaib (11-02-2011)



  #2  
Old 11-02-2011
USMLE Forums Guru
 
Steps History: Step 1 Only
Posts: 342
Threads: 50
Thanked 197 Times in 103 Posts
Reputation: 207
Default

ependymoma

e?
Reply With Quote Quick reply to this message
  #3  
Old 11-03-2011
USMLE Forums Scout
 
Steps History: Not yet
Posts: 62
Threads: 5
Thanked 23 Times in 14 Posts
Reputation: 33
Default

A) The tumor is histologically benign
Reply With Quote Quick reply to this message
 
  #4  
Old 11-03-2011
USMLE-Syndrome's Avatar
USMLE Forums Master
 
Steps History: ---
Posts: 1,203
Threads: 180
Thanked 1,251 Times in 441 Posts
Reputation: 1265
Default

B) The common location of the tumor is the fourth ventricle.
Reply With Quote Quick reply to this message
  #5  
Old 11-03-2011
dr.muhamad's Avatar
USMLE Forums Guru
 
Steps History: 1 + CS
Posts: 300
Threads: 22
Thanked 97 Times in 62 Posts
Reputation: 107
Default

i guess it is D
Reply With Quote Quick reply to this message
  #6  
Old 11-03-2011
USMLE Forums Scout
 
Steps History: Not yet
Posts: 50
Threads: 7
Thanked 16 Times in 12 Posts
Reputation: 26
Default

I think it's a medulloblastoma and it can cause hydrocephalus, since it can compress 4th ventricle.

answer C
Reply With Quote Quick reply to this message
  #7  
Old 11-03-2011
USMLE Forums Guru
 
Steps History: 1+CK+CS
Posts: 333
Threads: 162
Thanked 282 Times in 146 Posts
Reputation: 292
Correct Answer Answer

The correct Answer is D. This is a typical case of Ependymoma, involving the fourth ventricle and rosette patter in the histology as present in this case.
More frequently present are perivascular pseudorosettes in which tumor cells are arranged around vessels with an intervening zone consisting of thin ependymal processes directed toward the wall of the vessel.
Although some ependymomas are of a more anaplastic and malignant type, most of them are not anaplastic. For this reason, well-differentiated ependymomas are usually treated with radiation therapy only.
Reply With Quote Quick reply to this message
The above post was thanked by:
Gulara (11-04-2011), sleepy (11-04-2011), ThePretender (11-26-2011), usluipek (11-04-2011)



Reply

Tags
Micrographs-, MRI-Images, Nervous-System-, Pathology-, Step-1-Questions

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Location
Where you live. Leave blank if you don't want to tell.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
What brain tumor here; CT-image and Biopsy! Evergreen USMLE Step 1 Forum 9 11-03-2011 04:24 PM
Brain Tumor with MRI and biopsy? Evergreen USMLE Step 1 Forum 4 11-03-2011 03:39 AM
Histologic characteristics of this brain tumor? rulz USMLE Step 1 Forum 8 07-23-2011 10:02 AM
Adult Primary Brain Tumor jackat1000 USMLE Step 1 Mnemonics 1 01-19-2010 05:36 PM
Childhood Primary Brain Tumor jackat1000 USMLE Step 1 Mnemonics 0 01-19-2010 02:30 PM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2014)