Acta radiologica
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Juvenile nasopharyngeal angiofibroma is a benign lesion with locally aggressive nature. Knowledge of its typical growth patterns is crucial for precise preoperative staging and adequate preoperative patient counseling. This pictorial essay focuses on characteristic radiological features and paths of invasive growth of this rare tumor. Also, the impact of accurate preoperative evaluation of tumor extensions on surgical planning and results of treatment are discussed.
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Ultrasound can be used for the diagnosis of elbow injuries in infants and toddlers. However, ultrasound is highly operator-dependent and accurate ultrasound examinations require a complete understanding of the complex anatomy of the elbow joint. ⋯ Ultrasound is useful for the diagnosis of elbow injuries in infants and toddlers.
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Small peripheral lung nodules detected on computed tomography (CT) scans are often difficult to find during thoracoscopic resection, and the present localizing techniques are inefficient or impractical. ⋯ Preoperative localization of small peripheral pulmonary nodules using CT-guided embolization coil insertion and subsequent fluoroscopically-guided VATS resection is safer and more effective than conventional VATS.
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Longitudinal metabolic changes of total choline (tCho), creatine+phosphocreatine (total creatine, tCr), and N-acetylaspartate (NAA) in the pregenual anterior cingulate cortex (pACC) of patients with major depressive disorder (MDD) have not been well evaluated. ⋯ A progressive decrease in the NAA/tCr ratio in the pACC of patients with MDD was demonstrated and the decrease in this ratio was at the highest rate in the early period after illness onset. These findings indicate the neuronal degeneration and dysfunction of the pACC, and the importance of early clinical intervention in female patients with MDD.
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Comparative Study
Diffusion-weighted MRI of metastatic liver lesions: is there a difference between hypervascular and hypovascular metastases?
Different perfusion characteristics and histopathologic features of liver metastasis may potentially lead to different diffusion-weighted magnetic resonance imaging (DW-MRI) characteristics which can affect the performance of DW-MRI in their diagnosis. ⋯ Liver metastases are not a homogenous group of lesions with uniform DW-MRI features. Hypervascular metastases demonstrate significantly lower ADC values compared to hypovascular metastases. DW-MRI improved detection of hypervascular metastases compared to T2-w images alone and is a useful adjunct to T2-w images for their detection.