new_n_lost
Forum Hero
Topics: 654
Posts: 6,116
|
A 36-year-old Asian male complains of difficulty swallowing. Esophagoscopy reveals a polypoid mass that is subsequently biopsied. In addition to tumor cells, the esophageal biopsy show normal smooth muscle and striated muscle in the same section.
Which portion of the esophagus was the source of this biopsy?
A. Lower esophageal sphincter
B. Lower third of the esophagus
C. Middle third of the esophagus
D. Upper esophageal sphincter
E. Upper third of the esophagus
___________________
FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
|
| Jackofknives
Ipwnpoker.com
Topics: 91
Posts: 725
|
Bear with me here since I have had no teaching in abdominal viscera just yet. But I think the point here is that both oesophagus and the diaphragm are taken out, and therefore there is both smooth and striated muscle fibers. Here is where im uncertain about since I v had no topographic lessons on this subject,
Wouldn’t it be B, Lower third of the esophagus .
___________________
There are many things in this world that can’t be changed no matter how hard you try. That’s why you must not hesitate when the time comes where you have to give it all you’ve got.
|
| mytime
Go Marching in!
Topics: 39
Posts: 3,174
|
E.
|
| forumdoctor
Forum Senior
Topics: 14
Posts: 123
|
C
|
| usmle4me
Forum Elite
Topics: 6
Posts: 283
|
C.Middle third
Lower third is smooth
Upper third striated
|
| keepgoing
Forum Guru
Topics: 71
Posts: 1,890
|
no doubt its middle -->c
___________________
"God be with me "
|
| ShweHope99.9998
Forum Fanatic
Topics: 12
Posts: 2,675
|
A.
|
| forumdoctor
Forum Senior
Topics: 14
Posts: 123
|
NNL answer plsssssssssssss
|
| new_n_lost
Forum Hero
Topics: 654
Posts: 6,116
|
forumdoctor wrote:
C
___________________
FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
|
| new_n_lost
Forum Hero
Topics: 654
Posts: 6,116
|
The correct answer is C.
The muscularis of the upper third of the esophagus (choice E) is composed entirely of striated muscle.
The middle third (choice C) contains both striated and smooth muscle.
The lower third (choice B) and lower esophageal sphincter (choice A) contain only smooth muscle.
There is no such thing as the upper esophageal sphincter (choice D).
___________________
FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
|
| ShweHope99.9998
Forum Fanatic
Topics: 12
Posts: 2,675
|
I think I have made same mistake that at some where I have seen similar Q .
I ends up with C & A, then , choose A, think , C too middle.
How can you make the facts only like that to stick to your head, hmm , repeat , repeat , repeat, recite too , I guess .
|
| lq2006
Forum Elite
Topics: 43
Posts: 382
|
C
|
|
| |
| | | | | | | | | | | | |
