[khanar]

A football player presented with initially painful later painless hard mass in his upper arm.
X ray showed the following;

What is the usual treatment?

a-radiotherapy
b-radiotherapy + chemotherapy + excision
c-simple excision
d-no treatment needed

 

[syedaanaqvi]

is this myositis ossificans?

 

[Joseph]

I bet it is

 

[khanar]

Correct
It's myositis ossificans and the clue is that he's a football player (trauma)
the treatment is simple excision

 

[syedaanaqvi]

lol i got it correct! wasnt very sure as im not working for usmle at the moment..going to start from feb..
but i dint understand ur clue..explain a bit pls

 

[khanar]

lol i got it correct! wasnt very sure as im not working for usmle at the moment..going to start from feb..
but i dint understand ur clue..explain a bit pls

Myositis ossificans is caused after muscular strains and trauma usually seen in aggressive sports players such as American football players. Return to activity before complete healing of muscle strains has been deemed the reason why these muscles get ossified.
If they don't show the X ray they will probably say this in the question stem "Flocculent radiodensities surrounding a radiolucent central area".
It's important to differentiate this simple myositis ossificans from the more severe genetic disease called Fibrodysplasia Ossificans Progressiva see this emedicine article.