Renal Cell Carcinoma Clinical Presentation
- Author: Brendan Curti, MD; Chief Editor: Jules E Harris, MD more...
History
Renal cell carcinoma (RCC) may remain clinically occult for most of its course. The classic triad of flank pain, hematuria, and flank mass is uncommon (10%) and is indicative of advanced disease. Twenty-five to thirty percent of patients are asymptomatic, and their renal cell carcinomas are found on incidental radiologic study.
The most common presentations include hematuria (40%), flank pain (40%), and a palpable mass in the flank or abdomen (25%). Other signs and symptoms include weight loss (33%), fever (20%), hypertension (20%), hypercalcemia (5%), night sweats, malaise, and a varicocele, usually left sided, due to obstruction of the testicular vein (2% of males).
Renal cell carcinoma is a unique and challenging tumor because of the frequent occurrence of paraneoplastic syndromes, including hypercalcemia, erythrocytosis, and nonmetastatic hepatic dysfunction (ie, Stauffer syndrome). Polyneuromyopathy, amyloidosis, anemia, fever, cachexia, weight loss, dermatomyositis, increased erythrocyte sedimentation rate (ESR), and hypertension are also associated with renal cell carcinoma.
Cytokine release by tumor (eg, interleukin (IL)-6, erythropoietin, nitric oxide) causes these paraneoplastic conditions. Resolution of symptoms or biochemical abnormalities may follow successful treatment of the primary tumor or metastatic foci. (Go to Paraneoplastic Syndromes for more information.)
Physical Examination
Approximately 30% of patients with renal carcinoma (RCC) present with metastatic disease. The physical examination should include a thorough evaluation for metastatic disease, particularly in the following organs:
- Lung (75%)
- Soft tissues (36%)
- Bone (20%)
- Liver (18%)
- Cutaneous sites (8%)
- Central nervous system (8%)
The presence of a varicocele and findings of paraneoplastic syndromes should raise clinical suspicion for this diagnosis. In addition, look for hypertension, supraclavicular adenopathy, and a flank or abdominal mass with bruit. However, gross hematuria with vermiform clots suggests upper urinary tract bleeding.
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| Cell Type | Features | Growth Pattern | Cell of Origin | Cytogenetics |
| Clear cell | Most common | Acinar or sarcomatoid | Proximal tubule | 3p- |
| Chromophilic | Bilateral and multifocal | Papillary or sarcomatoid | Proximal tubule | +7, +17, -Y |
| Chromophobic | Indolent course | Solid, tubular, or sarcomatoid | Cortical collecting duct | Hypodiploid |
| Oncocytic | Rarely metastasize | Tumor nests | Cortical collecting duct | Undetermined |
| Collecting duct | Very aggressive | Papillary or sarcomatoid | Medullary collecting duct | Undetermined |

