Which statement(s) is/are true about neuroblastoma with respect to wilms tumor –

Wilm's Tumor Neuroblastoma Age Preschool Preschool Clinical features Unilateral flank mass(asymptomatic abdominal mass),abdominal pain,hematuria, hypertension, fever, anorexia, vomiting Abdominal mass,GI or genitourinary obstruction, proptosis, fever, bone pain, spinal cord compression, diarrhea, flushing, opsoclonus, myoclonus, headache Calcification Less commom (15%) More than (85%) & punctate Midline Not crossed (confined to one side) Crossed Aortic / IVC invasion Absent Present Spinal extension Absent Present Distortion of calyces Very common (90%) Not seen Hydronephrosis More common (40%) Less common(26%) Hydronephrosis No (always intrarenal) Neuroblastoma may occur at extrarenal sites. Retroperitoneal lymphadenopathy Less common (13%) More coomon(73%) Retrocrural lymphadenopathy No(0%) Present(30%) Liver metastasis No(0%) Present(18%)