Does CT of Thymic Epithelial Tumors Enable Us to Differentiate Histologic Subtypes and Predict Prognosis?
Yeon Joo Jeong1,
Kyung Soo Lee1,
Jhingook Kim2,
Young Mok Shim2,
Jungho Han3 and
O Jung Kwon4
1 Department of Radiology and Center for Imaging Science, Samsung Medical
Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu,
Seoul 135-710, South Korea.
2 Department of Thoracic Surgery, Samsung Medical Center, Sungkyunkwan
University School of Medicine, Seoul 135-710, South Korea.
3 Department of Diagnostic Pathology, Samsung Medical Center, Sungkyunkwan
University School of Medicine, Seoul 135-710, South Korea.
4 Division of Pulmonary and Critical Care Medicine, Department of Medicine,
Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
135-710, South Korea.

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Fig. 1. 58-year-old man with low-risk thymoma (type AB tumor).
Enhanced transaxial CT scan (7-mm collimation) obtained at level of aortic
arch shows 3.9 x 3.8 cm, round, anterior mediastinal mass
(arrows) with smooth contour and homogeneous attenuation.
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Fig. 2A. 68-year-old woman with high-risk thymoma (type B3 tumor).
Enhanced transaxial CT scan (7-mm collimation) obtained at level of
aortopulmonary window shows 4.4 x 4.7 cm, round, anterior mediastinal
mass with lobulated contour and central dotlike calcification
(arrow). This lesion shows heterogeneous enhancement with some area
of necrosis (arrowhead).
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Fig. 2B. 68-year-old woman with high-risk thymoma (type B3 tumor).
Follow-up CT scan (7-mm collimation) obtained at level of basal segmental
artery 34 months after A shows nodular thickening of pleura
(arrow), suggesting pleural tumor implantation.
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Fig. 3A. 44-year-old man with thymic carcinoma (type C tumor).
Enhanced transaxial CT scan (7-mm collimation) obtained at level of main
bronchi shows 4.0 x 7.3 cm, heterogeneously enhancing anterior
mediastinal mass (arrows) with irregular contour.
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Fig. 3B. 44-year-old man with thymic carcinoma (type C tumor). CT scan
obtained 4 cm superior to A shows obliteration of left innominate vein
by tumor invasion (arrowhead). Adjacent mediastinal fat plane
(black arrows) is partially obliterated. Also note enlarged right
upper paratracheal lymph node (white arrow).
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Fig. 3C. 44-year-old man with thymic carcinoma (type C tumor). CT scan
obtained at level of intrahepatic inferior vena cava shows nodular and
bandlike thickening of pleura (arrow), suggesting pleural tumor
implantation. Follow-up CT scan obtained 10 months later (not shown) revealed
hepatic and bone metastases.
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Copyright © 2004 by the American Roentgen Ray Society.