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Presence of Iron in Colorectal Adenomas and Adenocarcinomas
( Hye Seung Han ),( Sun Young Lee ),( Moo Kyung Seong ),( Jeong Hwan Kim ),( In Kyung Sung ),( Hyung Seok Park ),( Choon Jo Jin ),( Tae Sook Hwang ) 대한소화기기능성질환·운동학회 2008 Gut and Liver Vol.2 No.1
Background/Aims: Iron overload reportedly increases the risk of colorectal neoplasms, but the distribution of tissue iron in a colorectal neoplasm remains controversial. In this study, we attempted to determine the significance of tissue iron in colorectal adenomas and adenocarcinomas. Methods: This study investigated 138 colorectal neoplasms (54 adenocarcinomas, 25 adenomas with high-grade dysplasia, and 59 adenomas with low-grade dysplasia) that were removed by surgical or endoscopic resection in Konkuk University Hospital between August 2005 and August 2006. Adjacent normal colon tissues and colorectal neoplasms were stained with Perls` Prussian blue to reveal ferric compounds. Results: Positive Perls` staining was evident in 35.2% (19/54) of the adenocarcinomas and 22.6% (19/84) of the adenomas, and in only 2.2% (3/138) of the samples of adjacent normal colon tissue (p<0.001). Iron appears to reside exclusively in the stroma and outside the gland, rather than in the epithelial cells. Iron expression was strong in larger (p=0.004) and pedunculated (p<0.001) adenomas, and in all types of adenocarcinomas regardless of their size, shape, and location. Conclusions: The frequent presence of iron in the stroma of large adenomas, pedunculated adenomas, and adenocarcinomas indicates that iron deposition is a secondary phenomenon to intralesional hemorrhage rather than a consequence of epithelial-cell carcinogenesis. (Gut and Liver 2008;2:19-22)
KiBongYu,MyungKwanLim,HyungJinKim,ChangHaeSuh,HyungChunPark,EunYoungKim,HyeSeungHan 대한영상의학회 2002 Korean Journal of Radiology Vol.3 No.2
Clear-cell meningioma is a rare subtype of meningioma which occurs at a younger age and has a higher recurrence rate than other subtypes. We report two cases of clear-cell meningioma, one in the thoracolumbar spinal canal and the other in the cerebellopontine angle. Though the CT and MR imaging findings were not different from those of ordinary meningioma, after surgical removal the condition recurred repeatedly in the patient with spinal canal involvement.