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Metastatic Clear Cell Renal Cell Carcinoma Presenting as Acute Appendicitis
Oxana Ushakova1, Keyvan Ravakhah2
1Internal Medicine, MetroHealth Medical Center, Cleveland, USA.
Cureus
|September 27, 2023
Summary
Metastasis of renal cell carcinoma (RCC) to the appendix is exceptionally rare, unlike common sites like the lungs or liver. This rare presentation can occur years after initial treatment for kidney cancer.
Area of Science:
- Oncology
- Surgical Pathology
Background:
- Renal cell carcinoma (RCC) is a kidney cancer originating from tubular epithelial cells.
- Common sites for RCC metastasis include lungs, lymph nodes, bones, and liver.
Observation:
- Metastasis of RCC to the appendix is an extremely uncommon event.
- This rare metastatic pattern deviates from typical RCC spread.
Findings:
- While metastasis usually occurs within three years post-nephrectomy, late recurrences are documented.
- The appendix represents a highly unusual site for secondary malignancy from renal origin.
Implications:
- Highlights the importance of considering rare metastatic sites in the differential diagnosis of appendiceal masses.
- Underscores the unpredictable behavior and potential for late metastasis in renal cell carcinoma patients.
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