Left sided vs Right sided colon symptoms - 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 07-18-2013
USMLE Forums Veteran
 
Steps History: 1+CK+CS
Posts: 214
Threads: 29
Thanked 62 Times in 40 Posts
Reputation: 72
GIT Left sided vs Right sided colon symptoms

if someone could tell me what each side does.correct me if im wrong

Left sided - smaller diameter - crampy/colicky - infiltrating mass - hematochezia(according to fa - which is where im confused)

Right sided - larger diameter - obstructive - iron deficiency (again is there blood loss here as well)

so is there a differential factor related to the blood loss or blood in stool or any other blood related factor when differentiating these 2?
Reply With Quote Quick reply to this message



  #2  
Old 07-18-2013
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 1,867
Threads: 149
Thanked 2,104 Times in 1,049 Posts
Reputation: 2124
Default

Not correct.

R sided lesions are NOT obstructive due to larger diameter and therefore tend to present late. They tend to have cauliflower like growth and lose blood in small (occult) but continuous fashion (due to ulceration) leading to Fe deficiency anemia.

L sided lesions present earlier due to obstruction (small diameter) and with fresh blood being distal as compared to R sided lesion.
Both have blood in stool but L sided lesions have fresher blood as compared to R side lesions where it is occult bleeding (where it is usually diagnosed with stool guaiac test).
__________________
A man doesn't know what he knows until he knows what he doesn't know.
“What is man? He's just a collection of chemicals with delusions of grandeur.”
Reply With Quote Quick reply to this message
The above post was thanked by:
Fereshteh (07-18-2013), Krazy (11-12-2013)
  #3  
Old 07-18-2013
USMLE Forums Veteran
 
Steps History: 1+CK+CS
Posts: 214
Threads: 29
Thanked 62 Times in 40 Posts
Reputation: 72
Default

oh okay, larger diameter - infiltrating . small diameter - obstuctive.

ahh thanks for clearing up my "fresh blood and occult blood" conundrum.

the concepts make sense when youve understood it and it seems like such a mystery when its not.

anyway thanks man,good luck.
Reply With Quote Quick reply to this message
 
  #4  
Old 07-18-2013
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 1,867
Threads: 149
Thanked 2,104 Times in 1,049 Posts
Reputation: 2124
Default

Quote:
Originally Posted by samren17 View Post
oh okay, larger diameter - infiltrating . small diameter - obstuctive.

ahh thanks for clearing up my "fresh blood and occult blood" conundrum.

the concepts make sense when youve understood it and it seems like such a mystery when its not.

anyway thanks man,good luck.
Glad to be of help.

One correction: In general, Left sided lesions are infiltrating.
R sided lesions are more of a intraluminal growth.
__________________
A man doesn't know what he knows until he knows what he doesn't know.
“What is man? He's just a collection of chemicals with delusions of grandeur.”
Reply With Quote Quick reply to this message



Reply

Tags
Gastrointestinal-Tract-, Pathology-

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
Severe left sided pain in the face tyagee USMLE Step 2 CK Forum 5 09-24-2012 06:08 PM
2 sided p-value for testing the null hypothesis Novobiocin USMLE Step 2 CK Forum 1 07-15-2012 06:41 PM
Left sided weakness and tongue deviation! Evergreen USMLE Step 1 Forum 3 03-22-2012 06:00 PM
Right-sided facial pain! USMLE-Syndrome USMLE Step 2 CK Forum 2 06-27-2011 01:03 PM
Right Sided Versus Left Sided Colonic Cancer lee-usmle USMLE Step 1 Bits & Pieces 1 06-19-2010 12:14 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)