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KMID : 1100920230440050295
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Korean Journal of Family Medicine
2023 Volume.44 No. 5 p.295 ~ p.298
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Post-traumatic Fibro-Osseous Lesion of the Fourth Rib Simulating a Chest Wall Tumor: A Case Report
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Mouna Brahem
Olfa Jomaa
Mabrouk Abdelali
Rihab Sarraj
Amine Bayoudh
Leila Njim
Ahmed Zrig
Jacob Rosenberg
Haifa Hachfi
Mohamed Younes
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Abstract
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Post-traumatic fibro-osseous lesions (PTFOL) are a rare and benign tumor that typically affects the ribs and is prob-ably caused by an excessive post-traumatic reactive process. PTFOL primarily affects the sixth, seventh, and eighth ribs. Here, we report a case of a PTFOL with an unusual location and expansion that simulated a malignant chest tumor. A 28-year-old male patient with a history of minor chest trauma presented with pain. Chest radiography re-vealed a large, well-defined lesion on the left fourth rib, and computed tomography (CT) of the chest revealed a lyt-ic lesion-type IC on the posterior and middle arches of the left fourth rib with a cartilaginous matrix and discontin-ued periosteal reaction without soft tissue mass extension. Additionally, magnetic resonance imaging of the chest revealed an ovoid, expansive mass with cystic lobules and lobulated contours extending almost over the entire left fourth rib, measuring 134×47 mm in size. This mass has a low signal on T1-weighted images and a heterogeneous intermediate signal on T2-weighted images, with intense enhancement after gadolinium injection suggestive of a malignant chest tumor. A CT-guided bone biopsy confirmed the presence of an intramedullary lesion consisting of fibrous connective tissue with fusiform fibroblastic cells without atypical signs. The lesion was delimited by bone trabeculae with nibbled edges, indicating exaggerated osteoclastic activity compatible with a diagnosis of PTFOL. The patient was treated with simple analgesics, and chest pain was relieved, with an unchanged volume of the le-sion at 1 year of follow-up.
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KEYWORD
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Post-Traumatic Neoplasms, Ribs, Thoracic Wall, Radiography, X-Ray Tomography, Pathology
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