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Park, Kang, Kim, Lee, Chang, Yang, Lee, Moon, and Lee: Expansile Mass of the Rib
Case Report
The Ewha Medical Journal

The Ewha Medical Journal 2012; 35(1): 58-61.

Published online: 31 March 2012

DOI: https://doi.org/10.12771/emj.2012.35.1.58

Expansile Mass of the Rib

Kyung Seon Park, Hyeon Hui Kang, Ji Hyun Kim, Hwa Young Lee, Kyung Yoon Chang, Hae Kyung Yang, Sang Haak Lee, Hwa Sik Moon, Bae Young Lee1

Department of Internal Medicine, St. Paul's Hospital, The Catholic University of Korea School of Medicine, Seoul, Korea.

1Department of Radiology, St. Paul's Hospital, The Catholic University of Korea School of Medicine, Seoul, Korea.

Corresponding author: Sang Haak Lee, Department of Internal Medicine, St. Paul's Hospital, The Catholic University of Korea School of Medicine, 180 Wangsan-ro, Dongdaemun-gu, Seoul 130-709, Korea. Tel: 82-2-958-2114, Fax: 82-2-968-7250, agmante@gmail.com

Received 12 January 2012       Accepted 16 February 2012

Copyright © 2012. Ewha Womans University School of Medicine

Abstract

A 60-year-old man visited our hospital because of the incidentally found mass of the rib on chest radiography. Chest X-ray showed expansile bony hypertrophy on left 5th rib and bone setting of the computed tomography scan of chest revealed 4.2×2.5 cm sized, elongated bony expansion with geographic radiolucent lesion in the medullary cavity and cortical thinning. Technetium-99m bone scintigraphy showed diffusely increased radioactivity along the left 5th rib. We present this case to discuss about a possible differential diagnosis in this type of lesion.

Keywords: Ribs, Fibrous dysplasia, Bone neoplasms

Figures and Tables

Fig. 1
Posteroanterior chest radiography shows expansile bony hypertrophy on left 5th rib.
emj-35-58-g001
Fig. 2
Bone setting of the computed tomography scan of the chest shows elongated bony expansion with geographic radiolucent lesion in the medullary cavity and cortical thinning of left 5th rib (arrow).
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Fig. 3
Technetium-99m bone scintigraphy shows diffusely increased uptake of isotope along the left 5th rib.
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Fig. 4
Microscopic finding of excisional biopsy of the rib shows irregular spindles of woven bone (characteristic chinese letter, arrow) without osteoblastic rimming and a proliferation of fibroblast consistent with fibrous dysplasia (H&E stain, ×100).
emj-35-58-g004

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