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KMID : 0191120080230061121
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Journal of Korean Medical Science
2008 Volume.23 No. 6 p.1121 ~ p.1124
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Clear Cell "Sugar" Tumor of the Lung: A Well-Enhanced Mass with an Early Washout Pattern on Dynamic Contrast-Enhanced Computed Tomography
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Kim Woong-Ji
Kim So-Ri
Park Seoung-Ju
Lee Heung-Bum
Lee Yong-Chul
Lee Ka-Young
Choe Yeong-Hun
Jin Gong-Yong
Chung Myoung-Ja
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Abstract
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Clear cell tumor of the lung is a rare and very unusual benign pulmonary tumor. As clear cell tumor of the lung contains abundant cytoplasmic glycogen, this tumor is called "sugar tumor". We report a case of sugar tumor in a 64-yr-old man presenting as a round pulmonary nodule. On dynamic computed tomography (CT) scans, the solitary pulmonary nodule showed early wash-in enhancement with an early washout pattern like a lung malignancy. The patient underwent wedge resection for the tumor. Pathologic examination, including immunohistochemical studies, revealed that the nodule was a benign clear cell tumor, so-called "sugar tumor". Because only a small number of cases have been reported previously, clinical aspects, radiological characteristics on dynamic contrast-enhanced CT, and differential diagnosis of the tumor are not well established. Herein we present a clear cell tumor of the lung and discuss the clinical, radiological, and pathological features of the tumor.
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KEYWORD
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Clear Cell Tumor, Dynamic Contrast-Enhanced CT, Lung, Sugar Tumor, Washout Pattern
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