Clear cell likelihood score may improve diagnosis and management of renal masses.

The detection of solid renal masses has increased over time due to incidental findings during imaging studies conducted for unrelated medical conditions. Approximately 20% of lesions measuring less than 4 cm are benign and 80% are malignant. Clear cell renal cell carcinoma (ccRCC) is the most frequent among renal carcinomas, responsible for 65-80% of cases.

Computed tomography aspects of thoracic metastases from osteosarcoma: pictorial essay.

Osteosarcoma is the most common primary bone tumor, with a higher incidence in the second decade of life, and it often leads to pulmonary metastases. The most common pattern seen on computed tomography is one of multiple well-defined nodules in the lung parenchyma, often with calcifications. Because of the variety of presentations of pulmonary metastases in osteosarcoma, including atypical forms, knowledge of the computed tomography aspects of these lesions is important for characterizing and evaluating the extent of the disease, as well as for distinguishing metastatic disease from other benign or malignant lung diseases.

CT features of osteosarcoma lung metastasis: a retrospective study of 127 patients.

Objective: Osteosarcoma lung metastases have a wide variety of CT presentations, representing a challenge for radiologists. Knowledge of atypical CT patterns of lung metastasis is important to differentiate it from benign lung disease and synchronous lung cancer, as well as to determine the extent of primary disease. The objective of this study was to analyze CT features of osteosarcoma lung metastasis before and during chemotherapy.

Presacral medulloepithelioma with peritoneal carcinomatosis in an 11-year-old boy: An extremely rare association.

Medulloepithelioma is a rare and highly malignant tumor of infancy and early childhood, and classified as a primitive neuroectodermal tumor. Considering that most cases occur in the central nervous system, development in atypical sites associated with secondary comorbidities, such as peritoneal carcinomatosis, becomes an extremely rare association due to its high morbimortality. This study reports a rare case of peripheral medulloepithelioma with peritoneal carcinomatosis in an 11-year-old boy, with a 4-year history of intestinal constipation alternated with fecal incontinence, taken to the emergency room due to increasing abdominal pain and urinary retention.

Can gadoxetic acid-enhanced magnetic resonance imaging be used to avoid liver biopsy in patients with nonalcoholic fatty liver disease?

Background: Nonalcoholic fatty liver disease (NAFLD) is a major cause of liver disease worldwide. The diagnosis of nonalcoholic steatohepatitis (NASH), the most severe form of NAFLD, is crucial and has prognostic and therapeutic implications. However, currently this diagnosis is based on liver biopsy and has several limitations.

Influenza A (H1N1) pneumonia: HRCT findings.

Objective: To describe aspects found on HRCT scans of the chest in patients infected with the influenza A (H1N1) virus.

Methods: We retrospectively analyzed the HRCT scans of 71 patients (38 females and 33 males) with H1N1 infection, confirmed through laboratory tests, between July and September of 2009. The HRCT scans were interpreted by two thoracic radiologists independently, and in case of disagreement, the decisions were made by consensus.