대한흉부영상의학회 Korean Society of Thoracic Radiology

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Weekly Chest CasesArchive of Old Cases

Case No : 1469 Date 2025-12-15

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  • Courtesy of Jinwoo Son, Na Young Kim, Hye-Jeong Lee / Severance hospital
  • Age/Sex 52 / F
  • Chief ComplaintIncidental mediastinal mass
  • Figure 1
  • Figure 2
  • Figure 3
  • Figure 4
  • Figure 5
  • Figure 6
  • Figure 7

Diagnosis With Brief Discussion

Diagnosis
Mediastinal desmoid tumor
Radiologic Findings
Fig 1-2. CT scan shows approximately 6 cm sized hypoattenuating mass in the highest mediastinum.
Fig 3-7. On MRI, the mass shows midly heterogeneous intermediate signal intensity on T2 weighted image and hypointense signal intensity on T1 weighted images. It also shows diffusion restriction and moderate contrast enhancement. No definite invasion of adjacent structures. DWI: diffusion weighted image, FS: fat suppression
Brief Review
Desmoid tumors, also known as aggressive fibromatosis, are a heterogeneous group of rare and benign soft tissue tumors caused by monoclonal proliferation of well-differentiated fibroblasts. They primarily arise from connective tissues in adults aged 25
References
1. Dinauer PA, Brixey CJ, Moncur JT, Fanburg-Smith JC, Murphey MD. Pathologic and MR imaging features of benign fibrous soft-tissue tumors in adults. Radiographics. 2007 Jan-Feb;27(1):173-87. doi: 10.1148/rg.271065065.
2. Lee JH, Jeong JS, Kim SR, Jin GY, Chung MJ, Kuh JH, Lee YC. Mediastinal Desmoid Tumor With Remarkably Rapid Growth: A Case Report. Medicine (Baltimore). 2015 Dec;94(52):e2370. doi: 10.1097/MD.0000000000002370.
Keywords

No. of Applicants : 66

▶ Correct Answer : 9/66,  13.6%
  • - Secomedic Hospital , Japan FUMINORI MIYOSHI
  • - Osaka University , Japan AKINORI HATA
  • - Osaka Metropolitan University Hospital , Japan SHU MATSUSHITA
  • - Osaka metropolitan university Hospital , Japan TATSUSHI OURA
  • - , Japan MATSUNO MAI
  • - Kyoto University , Japan SHO KOYASU
  • - Yonsei University,Severance Hospital , Korea (South) SEO BUM CHO
  • - Kantou Rousai Hospital , Japan KAORU SUMIDA
  • - Nara medical university , Japan HIROHIDE WATANABE
▶ Correct Answer as Differential Diagnosis : 4/66,  6.1%
  • - The University of Tokyo Hospital , Japan ISSEI FUKUDA
  • - Shiga University of Medical Science , Japan AKITOSHI INOUE
  • - Kyoto University , Japan AKIHIKO SAKATA
  • - The University of Tokyo Hospital , Japan TOSHIHIRO FURUTA
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