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Two women presented with sore throat and fever. Their symptoms were not alleviated by antibiotics. Cervical computed tomography (CT) with contrast enhancement demonstrated enlargement of predominant posterior cervical lymph nodes and streaky heterogeneous tonsils with interspersed low attenuation. They were diagnosed as having infectious mononucleosis by their laboratory data. Thus, when radiologists encounter these CT findings of pharyngitis that is not alleviated by antibiotic therapy, infectious mononucleosis should be considered in the differential diagnosis.

We report a case of adrenal schwannoma, an extremely rare retroperitoneal neoplasm. The patient was a 33-year-old man who presented with an abdominal mass that was discovered at abdominal sonography. Computed tomography showed an 8-cm well-circumscribed homogeneous mass that enhanced slightly after intravenous administration of contrast material. Magnetic resonance imaging showed low signal intensity on T1-weighted images and heterogeneously high signal intensity on T2-weighted images. Although these imaging findings are nonspecific, adrenal schwannomas should be included in the differential diagnosis of solid nonfunctioning adrenal tumors.

Exostosis occurs in the ribs either sporadically or as a manifestation of a genetic disorder known as hereditary multiple exostoses. Costal exostosis may cause chest pain and, on rare occasions, result in hemothorax. We report a case of hemothorax owing to costal exostosis in a 4-year-old boy.

The case of an aneurysm of a systemic artery supplying otherwise normal basal segments of the left lower lobe is presented. The diagnosis was correctly made postprocessed with three-dimensional reformatting using a multidetector row CT (MDCT) scanner. Conventional angiography was obviated.

The purpose of this prospective study was to perform quantitative multidetector computed tomography (MDCT) analysis of pulmonary solid nodules using three parameters (long-short ratio, compactness, and intranodular CT number) and to evaluate the usefulness of each parameter in the differentiation of the nodules. Seventy solitary pulmonary nodules with a long axis length of 5–30 mm were examined using one multidetector CT (MDCT) system and one three-dimensional (3D) system, and the findings regarding the three parameters were statistically analyzed among five diseases (hamartoma, organizing pneumonia, adenocarcinoma, squamous cell carcinoma, and metastasis). The long-short ratio of the pulmonary nodule showed no significant differences among five diseases. The compactness showed significant differences (P < 0.05) in five pairs of diseases. Intranodular CT number showed significant differences (P < 0.05) in three pairs of diseases. Our results are insufficient for the complete differentiation of pulmonary solid nodules. However, among the three parameters, compactness and intranodular CT number contribute somewhat to the differentiation of pulmonary nodules.

To determine the frequency and sonographic features of focal sparing of fatty liver at segment 2.The sonographic database was searched over the preceding three years. The criteria for sonographic diagnosis of focal sparing of fatty liver was an area of liver parenchyma of relatively low echogenicity with lack of mass effect.Six (0.9%) of 686 patients with diffuse fatty liver showed focal sparing at segment 2. The areas showed spherical or ovoid hypoechoic mass-like lesions measuring 2 to 6 cm in longest diameter (average, 3.8 cm). These all abutted on the posterior surface of segment 2 adjacent to the ligamentum venosum. These were segmental in two cases and subsegmental in four.In diffuse fatty liver, segment 2 is infrequently spared, and this may be a helpful adjunct sign of fatty liver.