Interactive Case Study - May 2017

Question 1:

A 61-year-old morbidly obese male presented with a four-year history of a slowly enlarging, asymptomatic, right thigh mass. Excision showed the following histopathology (Figures 1- 5).
 
Click on this image to view the virtual slide.
 
 
Figure 1. 20x

 
Figure 2. 20x
 
 
Figure 3. 20x

 
Figure 4. 200x
 
 
Figure 5. 400x

Which of the following is the best diagnosis?
 

A.	Massive localized lymphedema (MLL)

B.	Atypical lipomatous tumor/well-differentiated liposarcoma (ALT/WDLS)

C.

Lipoma

D.	Angiosarcoma

E.	Post-traumatic pseudolipoma