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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>
Lee, Hyunjong,Lee, Won Woo,Park, So Yeon,Kim, Sang Eun Korean Radiological Society 2016 KOREAN JOURNAL OF RADIOLOGY Vol.17 No.2
<P>Objective: The aim of the study was to compare the diagnostic performances of F-18 sodium fluoride positron emission tomography/computed tomography (bone PET/CT) and bone scintigraphy (BS) for the detection of thyroid cancer bone metastasis. Materials and Methods: We retrospectively enrolled 6 thyroid cancer patients (age = 44.7 +/- 9.8 years, M:F = 1:5, papillary: follicular = 2: 4) with suspected bone metastatic lesions in the whole body iodine scintigraphy or BS, who subsequently underwent bone PET/CT. Pathologic diagnosis was conducted for 4 lesions of 4 patients. Results: Of the 17 suspected bone lesions, 10 were metastatic and 7 benign. Compared to BS, bone PET/CT exhibited superior sensitivity (10/10 = 100% vs. 2/10 = 20%, p = 0.008), and accuracy (14/17 = 82.4% vs. 7/17 = 41.2%, p < 0.025). The specificity (4/7 = 57.1%) of bone PET/CT was not significantly different from that of BS (5/7 = 71.4%, p > 0.05). Conclusion: Bone PET/CT may be more sensitive and accurate than BS for the detection of thyroid cancer bone metastasis.</P>