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Title : Case 92

Age / Sex : 23 / M



Age / Sex : 23/M



Chief complaint : palpable mass and pain on left pelvic area







1) What is your impression?

Two weeks later, you can see the final diagnosis with a brief discussion of this case.

* Send Application Answers to Ja-Young Choi, MD (drchoi01@gmail.com)
* Case number, Answers, Name & Affiliation of Answerer should be included.




Courtesy: Kyung Nam Ryu, MD.
               KYUNG HEE UNIVERSITY MEDICAL CENTER


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Diagnosis:

chondroblastic osteosarcoma



Discussion


Findings: 


cloud-like tumor matrix formation in left ilium on plain radiograph


extraosseous cartilaginous mass formation


Fibrous strands traversing extraosseous cartilaginous mass


Surburst periosteal reaction.


 


Differential Diagnosis: chondrosarcoma


 


Diagnosis: chondroblastic osteosarcoma


 


Discussion:
 Cartilage is a component of cartilage matrix tumor(enchondroma, chondroblastoma, chondromyxoid fibroma and chondrosarcoma), however many tumors can show cartilage component within the tumor, such as chondroblastic osteosarcoma, fibrocartilagenous dysplasia, bizarre parosteal osteochondromatous proliferation.


 


References:


Imaging of periosteal osteosarcoma: radiologic-pathologic comparison. Radiology 2004;233:129-138

Correct Answer
Name Institution
Total Applicants (8)
Correct Answer (3)
이승훈: 서울보훈병원
정혜원: 서울아산병원
진욱: 경희대학교동서신의학병원
Semicorrect Answer (1)
박소영: 분당서울대병원

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