Book 4 - Self Instructional Manual for Cancer Registrars - SEER ...

Regional Lymph NodesThe lymphatics of the kidney and renal pelvis drain to retroperitoneal nodes along the abdominalaorta and vena cava (paracaval), primarily to those near the origin of the renal arteries. Perirenainodes are those at the renal hilus.Malignant TumorsTumors which arise in the kidney parenchyma or the renal pelvis usually can be distinguished bythe histologic type:Malignanttumors of the k/dney parenchyma:• Adenocarcinoma makes up 80 per cent of renal tumors. It may also be called hypernephroma,renal cell carcinoma, and Grawitz's tumor.• Wilms' tumor or nephroblastoma is the most common abdominal malignancy in children. It isalmost exclusively a disease of children under six years of age. It is a mixed tumor histologicallymade up of embryonal tissue, probably of nephrogenic origin. It is highly malignant but oftenis successfully treated.Malignanttumors of the renalpelvis:• Transitional cell carcinoma is the most common tumor of the renal pelvis.• Squamous cell carcinoma is rare.Tumors of the renal pelvis comprise 15-18 percent of the renal malignancies.253