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Myxoid Chondrosarcoma of the Sinonasal Cavity in a Child: a Case Report
Kim, Yeo Ju,Im, Soo Ah,Lim, Gye-Yeon,Chun, Ho Jong,Park, Hyun Jin,Kim, Min Sik,Choi, Yeong Jin The Korean Radiological Society 2007 KOREAN JOURNAL OF RADIOLOGY Vol.8 No.5
<P><B/></P><P>Chondrosarcomas are malignant tumors of cartilage that rarely involve the sinonasal region, and myxoid chondrosarcoma is a rare histologic variant of chondrosarcoma that usually occurs in the soft tissue of extremities. Although several case reports and results of small series of chondrosarcomas in the sinonasal region in children are available, myxoid type chondrosarcoma is extremely rare. We recently experienced a case of low grade myxoid chondrosarcoma involving the sinonasal cavity in a 10-year-old boy, and here we report its radiologic-pathologic findings. In this case, chondroid calcification on CT and septal and marginal enhancement on MRI suggested a chondrosarcoma. Whole body PET-CT demonstrated no definite metastatic lesion and a low peak standardized uptake value primary tumor. However, no definite distinguishing imaging features were observed that distinguished low grade myxoid chondrosarcoma from conventional chondrosarcoma.</P>
Radiological Spectrum of Hepatic Mesenchymal Hamartoma in Children
Kim, Soung Hee,Kim, Woo Sun,Cheon, Jung-Eun,Yoon, Hye-Kyung,Kang, Gyeong Hoon,Kim, In-One,Yeon, Kyung Mo The Korean Radiological Society 2007 KOREAN JOURNAL OF RADIOLOGY Vol.8 No.6
<P><B>Objective</B></P><P>A hepatic mesenchymal hamartoma is an uncommon benign tumor in children and little is known about the spectrum of its radiological features. The purpose of this study is to describe the spectrum of radiological features of a hepatic mesenchymal hamartoma in children.</P><P><B>Materials and Methods</B></P><P>Thirteen children with a pathologically confirmed hepatic mesenchymal hamartoma (M:F = 7:6; mean age, 3 years 2 months) were included in our study. Ultrasonography (US) was performed in nine patients including color and power Doppler US (n = 7). CT scans were performed in all patients. We evaluated the imaging findings of the hepatic mesenchymal hamartomas and the corresponding pathological features.</P><P><B>Results</B></P><P>Each patient had a single tumor (mean diameter: 13 cm [1.8-20 cm]). On CT and/or US, four patients (31%) had a 'multiseptated cystic tumor', five patients (38%) had a 'mixed solid and cystic tumor', and four patients (31%) had a 'solid tumor.' The septa of the cystic portion were thin in the multiseptated cystic tumors and irregularly thick in the mixed solid and cystic tumors as seen on US. On a post-contrast CT scan, solid portions or thick septa of the tumors showed heterogeneous enhancement. The amount of hepatocytes was significantly different among the three tumor groups according to the imaging spectrum (<I>p</I> = 0.042).</P><P><B>Conclusion</B></P><P>A hepatic mesenchymal hamartoma in children can show a wide spectrum of radiological features, from a multiseptated cystic tumor to a mixed solid and cystic tumor, and even a solid tumor.</P>
Nonpalpable Breast Masses: Evaluation by US Elastography
Cho, Nariya,Moon, Woo Kyung,Park, Jeong Seon,Cha, Joo Hee,Jang, Mijung,Seong, Min Hyun The Korean Radiological Society 2008 KOREAN JOURNAL OF RADIOLOGY Vol.9 No.2
<P><B>Objective</B></P><P>To compare the diagnostic performances of conventional ultrasound (US) and US elastography for the differentiation of nonpalpable breast masses, and to evaluate whether elastography is helpful at reducing the number of benign biopsies, using histological analysis as a reference standard.</P><P><B>Materials and Methods</B></P><P>Conventional US and real-time elastographic images were obtained for 100 women who had been scheduled for a US-guided core biopsy of 100 nonpalpable breast masses (83 benign, 17 malignant). Two experienced radiologists unaware of the biopsy and clinical findings analyzed conventional US and elastographic images by consensus, and classified lesions based on degree of suspicion regarding the probability of malignancy. Results were evaluated by receiver operating characteristic curve analysis. In addition, the authors investigated whether a subset of lesions was categorized as suspicious by conventional US, but as benign by elastography.</P><P><B>Results</B></P><P>Areas under the ROC curves (Az values) were 0.901 for conventional US and 0.916 for elastography (<I>p</I> = 0.808). For BI-RADS category 4a lesions, 44% (22 of 50) had an elasticity score of 1 and all were found to be benign.</P><P><B>Conclusion</B></P><P>Elastography was found to have a diagnostic performance comparable to that of conventional US for the differentiation of nonpalpable breast masses. The authors conclude that BI-RADS category 4a lesions with an elasticity score of 1 probably do not require biopsy.</P>