Case Report
Copyright ©The Author(s) 2022. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Aug 16, 2022; 10(23): 8330-8335
Published online Aug 16, 2022. doi: 10.12998/wjcc.v10.i23.8330
Periosteal chondroma of the rib: A case report
Ying Gao, Ji-Gang Wang, Hua Liu, Chuan-Ping Gao
Ying Gao, Chuan-Ping Gao, Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
Ji-Gang Wang, Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao 266003, Shandong Province, China
Hua Liu, Department of Radiology, Shinan People Hospital of Qingdao, Qingdao 266000, Shandong Province, China
Author contributions: Gao Y and Liu H reviewed the literature and drafted the manuscript; Wang JG was the pathologist involved in the case, reviewed the literature, and drafted the manuscript; Gao CP proofread the manuscript; All authors issued final approval of the version for submission.
Informed consent statement: All study participants provided informed written consent prior to study enrollment.
Conflict-of-interest statement: All authors report no relevant conflict of interest for this article.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Chuan-Ping Gao, MD, Doctor, Department of Radiology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao 266003, Shandong Province, China. gaochuanping2021@163.com
Received: March 5, 2022
Peer-review started: March 5, 2022
First decision: April 28, 2022
Revised: April 30, 2022
Accepted: July 11, 2022
Article in press: July 11, 2022
Published online: August 16, 2022
Processing time: 148 Days and 20.3 Hours
Abstract
BACKGROUND

Periosteal chondroma is a very rare benign tumor that develops adjacent to the cortical surface of bone and beneath the periosteal membrane. Periosteal chondroma of the rib is an extremely rare entity.

CASE SUMMARY

The patient was a 43-year-old man who had been incidentally found to have a mediastinal mass 1 mo earlier. Plain computed tomography showed a lobulated soft tissue mass on the right side of the T4/5 vertebra that measured about 47 mm × 28 mm in the transverse view and contained diffuse stippled calcification. The mass caused cortical scalloping of the right fourth rib and marginal bone sclerosis. Enhanced computed tomography showed mild enhancement of the mass. Magnetic resonance imaging showed a lobulated mass on the right side of the thoracic vertebra with long TI and T2 signals, mottling, and patchy long T1 and short T2 signals inside. The lesion had a hypointense rim. Enhanced magnetic resonance imaging showed enhancement predominantly at the periphery of the tumor. The tumor was approached through a right posterolateral thoracotomy, and parts of the fourth and fifth ribs were excised with the tumor. Postoperative pathological analysis revealed periosteal chondroma of the rib.

CONCLUSION

Periosteal chondroma of the rib has a low incidence and typical imaging manifestations. Understanding its imaging features is helpful to ensure a correct preoperative diagnosis.

Keywords: Periosteal chondroma; Rib; Computed tomography; Magnetic resonance imaging; Case report

Core Tip: Periosteal chondroma of the rib is an extremely rare entity. On computed tomography images, this tumor presents as a lobulated soft tissue mass with calcification that causes pressure erosion at the cortical surface. On magnetic resonance imaging, it shows a hyperintense signal on T2-weighted images without involvement of the medullary cavity. The lesion is bordered by a hypointense rim because it consists of fibrous tissue and an intact periosteum with a cartilaginous lobule on the surface.