Nuclear Medicine / Molecular Imaging
Nuclear scintigraphy findings for Askin tumor with In111-pentetreotide, Tc99m-MIBI and F18-FDG. by Johnathan Chen et al. |
Published: 2012 Oct Issue: 6(10) :: Pages: 32-39
| Abstract: Askin tumor is a rare disease which had previously been reported as being thallium-201 and gallium-67 avid. Varying data regarding 18F-fluorodeoxyglucose metabolism has been described with Ewing family of soft tissue tumors. In this case, we present a patient found to have an Askin tumor of the left chest wall which demonstrated indium-111 pentetreotide and technetium-99m MIBI avidity. The lesion did not show 18F-fluorodeoxyglucose hypermetabolism in this case despite the aggressiveness of the tumor. The patient was treated with surgical excision of the tumor and chemotherapy. Subsequently, contrast enhanced CT, indium-111 pentetreotide and technetium 99m-MIBI showed that the lesion had regressed. These findings suggest that Askin tumor can demonstrate Indium-111 pentetreotide and technetium 99m-MIBI uptake and need not be hypermetabolic on 18F-fluorodeoxyglucose exam.
Available image modalities: (click on modality to browse for other articles) Conventional Radiography, Nuclear Medicine, Microscopic pathology, Table
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Pediatric Radiology
Children Presenting with Calcified Disc Herniation: A Self-Limiting Process. by Chang Ho et al. |
Published: 2012 Oct Issue: 6(10) :: Pages: 11-19
| Abstract: We present two cases of disc herniation associated with juvenile intervertebral disc calcification, a rare, self-limiting process which typically resolves with conservative treatment. Recognition of this entity prevents unnecessary diagnostic workup and possible surgical intervention. A review of the literature for this rare entity is discussed.
Available image modalities: (click on modality to browse for other articles) Conventional Radiography, Computed Tomography, Magnetic Resonance Imaging, Table
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Neuroradiology
Imaging characteristics of an unusual, high-grade angiocentric glioma: A case report and review of the literature. by Hector N. Aguilar et al. |
Published: 2012 Oct Issue: 6(10) :: Pages: 1-10
| Abstract: Angiocentric gliomas have recently been reclassified as a separate central nervous system tumor. Few cases have been reported, and most of those correspond to slow-growing, low-grade neoplasms in very young pediatric patients. Here we describe magnetic resonance imaging findings (including diffusion imaging, spectroscopy and tractography) in an unusual higher-grade neoplasm with pathologic features suggestive of an angiocentric glioma in a 15-year-old male. The tumor had mild heterogeneous enhancement on magnetic resonance imaging, and a low apparent diffusion coefficient (9.9 x 10-4 mm2s-1), consistent with an intermediate-to-high cellularity tumor. Spectroscopic imaging showed elevated choline/phosphocreatine and choline/N-acetyl aspartate ratios, suggesting an unusually aggressive tumor. We conclude that angiocentric glioma should not be excluded from consideration at primary diagnosis, particularly in teenaged patients nearing adulthood.
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Musculoskeletal Imaging
An Accessory Peroneocalcaneus Internus Muscle with MRI and US Correlation by Benjamin Matthew Howe et al. |
Published: 2012 Oct Issue: 6(10) :: Pages: 20-25
| Abstract: The peroneocalcaneus internus (PCI) is a rare accessory muscle of the medial ankle with typical MRI anatomic features allowing differentiation from the more common accessory flexor digitorum longus muscle. To our knowledge, there have been no previously published sonographic images of the peroneocalcaneus internus. A PCI is typically an incidental, asymptomatic finding, but knowledge of the entity may avoid confusion when initially encountered by diagnostic ultrasound. We review the anatomic imaging features which allow for a confident imaging diagnosis and the clinical relevance of this anomaly.
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Thoracic Radiology
Bronchial carcinosarcoma by Carolina Carcano et al. |
Published: 2012 Oct Issue: 6(10) :: Pages: 26-31
| Abstract: Carcinosarcoma is an uncommon mixed tumor of the lung. We present the case of a 65 year-old-male with cough and a right lower lobe radio-opacity who underwent resection, showing a large endobronchial tumor with an epithelial component of non-small cell carcinoma and malignant mesenchymal elements. The radiologic and histopathologic features are reviewed with reference to relevant literature.
Available image modalities: (click on modality to browse for other articles) Conventional Radiography, Computed Tomography, Macroscopic pathology, Microscopic pathology, Table
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