Age / Sex : 34 / M

Chief complaint : Incidental. anterior chest wall mass on Chest PA

What is your diagnosis?



Two weeks later, you can see the final diagonosis with a brief discussion of this case (Please submit only one answer).

Courtesy : 이영한 (Young Han LEE) , 연세의대 세브란스병원 (Yonsei Univ. College of Medicine, Severance hospital) 

Juxtacortical (periosteal) Chondroma

Discussion

Findings:

 Radiolucent soft tissue mass with erosion or saucerization of adjacent cortex

 High signal intensity on T2-weighted images. Peripheral or septal contrast enhancement.

Differential Diagnosis:

 Juxtacortical (periosteal) chondrosarcoma

 Myositis ossificans

 Bizarre parosteal osteochondromatous proliferation

Diagnosis:  

Juxtacortical (periosteal) Chondroma

 
Discussion:

Juxtacortical (periosteal) chondroma is a rare benign cartilaginous tumor originating from the periosteum. Imaging features have been reported previously and are characterized by cortical scalloping with overhanging edges, chondroid matrix, and soft tissue mass. Detection and characterization are usually done by conventional radiographs (CR), followed by magnetic resonance imaging (MRI). Treatment includes complete tumor excision with subsequent bone graft filling

 References:

1. Skeletal Radiol. 1999; 28(1): 1–20.


2. J Belg Soc Radiol. 2019; 103(1): 22.


3. Semin Musculoskelet Radiol. 2000;4:45–58.