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Thus, at present, we should read Kitajima's review http://www.selleck.cn/products/CAL-101.html article thoroughly and follow its prescription until a consensus is arrived at. None declared. ""This article clearly showed evidence that obesity is a fair prognostic factor for renal cell carcinoma patients with organ-confined disease.[1] Such findings have been accumulating recently enough to convince somewhat mysterious phenomenon. An intriguing finding of this article is the possible discrepancy between the initiation and progression of renal carcinoma exposed to obese conditions. The authors suggested that the phenomenon is attributable to hormonal/endocrine factors or genetic difference, which, I hope, could yield new findings in order to understand the ��peculiar�� behavior of renal carcinoma. Although the size of the tumor was not described in the article, it is likely that smaller tumors were detected in obese patients, indicating that http://www.selleckchem.com/products/bay-57-1293.html lead-time bias might be one of the candidates that explain a positive prognosis. Multifactorial consideration would be indispensable in analyzing the phenomenon, including biological and socioeconomic aspects. None declared. ""Minimal fat angiomyolipomas (AML) are a diagnostic challenge.1�C3 Herein, we present a case of minimal fat AML in a patient with tuberous sclerosis complex (TSC). An ultrasound in a 13-year-old girl with TSC showed a 3-cm right renal tumor. Magnetic resonance imaging (MRI) confirmed this finding and found two other 1-cm right renal tumors (Fig.?1). All tumors had a low T2 signal and no intratumoral fat (as assessed on chemical shift in- and out-of-phase T1 images, and fat-saturation images). Post-surgical pathology showed minimal fat AML. AML, composed histologically of smooth muscle, aberrant vessels and fat, are the most common benign renal tumors (0.1�C0.2% incidence).2 However, in TSC, AML have a 70�C90% incidence, and can be multiple and bilateral.4 AML ��4?cm have a 50% risk of hemorrhage and are generally http://www.selleckchem.com/products/gsk2126458.html treated (typically by endovascular embolization).2,3 AML require differentiation from renal cell carcinomas (RCC), which occur in 2�C4% of TSC patients.4 This is important given the varying prognosis and treatment options (embolization for AML vs surgery for RCC). Diagnosis of AML is dependent on identifying fat on imaging. Macroscopic fat has a high signal intensity on T1 and T2, and shows signal loss on fat suppression MRI.1,2 Microscopic fat shows a signal loss on out-of-phase T1 compared with in-phase T1 chemical shift MRI.1,2 However, fat is not detected in 4�C5% of AML �C��minimal fat AML��.2,3 These pose a diagnostic dilemma, as they can be misdiagnosed as RCC (pathologically confirmed AML are responsible for