Maxiallary Sinus Mucosal Biopsy Reveals this! - 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 02-07-2011
USMLE Forums Guru
 
Steps History: Step 1 Only
Posts: 487
Threads: 95
Thanked 1,463 Times in 357 Posts
Reputation: 1473
Arrow Maxiallary Sinus Mucosal Biopsy Reveals this!

A 38-year-old Caucasian male undergoing treatment for acute myelogenous leukemia (AML) complains of severe right-sided headaches. Physical examination reveals right-sided proptosis and periorbital tenderness. Biopsy of the right maxillary sinus mucosa reveals the following:


Which of the following is the most likely cause of this patient’s condition?

A. Malassezia furfur
B. Microsporum can/s
C. Rhizopus species
D. Aspergillus fumigatus
E. Candida albicans
F. Cryptococcus neoformans
G. Blastomyces dermatitidis
H. Histoplasma capsulatum
I. Coccidioides immitis
J. Sporothrix schenckii
Reply With Quote Quick reply to this message
The above post was thanked by:
drarnab (02-08-2011), Mondoshawan (02-08-2011), Taiwan_Guy (05-07-2011), zitney (02-08-2011)



  #2  
Old 02-08-2011
USMLE Forums Scout
 
Steps History: 1 + CS
Posts: 33
Threads: 5
Thanked 17 Times in 9 Posts
Reputation: 27
Default

I think its Rhizopus this time , nonseptate invade the sinuses in a patient who is somehow immunocompromised
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-08-2011), Mondoshawan (02-08-2011)
  #3  
Old 02-08-2011
USMLE Forums Veteran
 
Steps History: 1+CK+CS
Posts: 244
Threads: 16
Thanked 200 Times in 86 Posts
Reputation: 210
Default

This is Rhizopus - Nearly right angle branching hyphae in a person who is immunosuppressed.
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-08-2011), Mondoshawan (02-08-2011)
 
  #4  
Old 02-08-2011
USMLE Forums Guru
 
Steps History: Step 1 Only
Posts: 487
Threads: 95
Thanked 1,463 Times in 357 Posts
Reputation: 1473
Arrow C) Rhizopus species

Mucor, Rhizopus and Absidia species are saprophytic fungi present in the environment. They are transmitted by spore inhalation and cause mucormycosis. Patients with underlying immunosuppression (e.g. solid organ transplantation patients, patients with hematologic malignancies, patients undergoing corticosteroid treatment) are at high risk. Mucormycosis is also very strongly associated with diabetic ketoacidosis.

Mucormycosis tends to affect the paranasal sinuses. Patients complain of facial and periorbital pain, headache and purulent nasal discharge. The fungi proliferate in the walls of blood vessels and cause necrosis of the corresponding tissue. Black eschar (necrotic tissue) may be seen on the palate or nasal turbinates.

Mucormycosis is diagnosed by light microscopy of a tissue specimen. Mucor, Rhizopus and Absidia fungi exist in mold form only. They form broad nonseptate hyphae that branch at wide (often 90° angles). The typical histologic appearance is shown on the slide above. Mucormycosis is treated by surgical debridement of necrotic tissue and amphotericin B.
Reply With Quote Quick reply to this message
The above post was thanked by:
cool_atomic (02-09-2011), donofitaly (02-08-2011), drarnab (02-08-2011), Mondoshawan (02-08-2011), Taiwan_Guy (05-07-2011), zitney (02-08-2011)



Reply

Tags
Microbiology-, Micrographs-, 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
Liver disease that does not need a Liver Biopsy? FSUSTC USMLE Step 2 CK Forum 7 04-27-2011 05:07 AM
cavernous sinus thrombosis achistikbenny USMLE Step 1 Forum 8 05-17-2010 12:58 PM
CNS Biopsy doctorF USMLE Step 1 Forum 8 04-27-2010 07:33 AM
Increased Glucocerebroside in Liver Biopsy? Seetal USMLE Step 1 Forum 4 04-18-2010 12:07 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)