“…To date, bone metastasis, which is observed only in advanced cases, is the only known finding that favors a diagnosis of CCSK over WT [ 5 , 14 ]. MRI is indicated to characterize a lesion of the contralateral kidney, which is exceptional in CCSK [ 7 , 11 , 15 ], it is also recommended in the case of an endoluminal lacuna of the inferior vena cava to specify the nature of the thrombus, cruciate or tumoral, and to present the surgeon with a precise mapping of its extension, in particular during the preoperative evaluation [ 7 , 11 , [16] , [17] – 18 ].…”