Korean J Med.
2013 May;84(5):747-750.
A Carcinoid Tumor Arising from a Normal Kidney in a Young Man
- Affiliations
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- 1Department of Internal Medicine, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea. kyw8625@chol.com
- 2Department of Pathology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.
- 3Department of Internal Medicine, Dae Dong Hospital, Busan, Korea.
Abstract
- Carcinoid tumors are low-grade malignant tumors arising from neuroendocrine cells. Primary renal carcinoid tumor is very rare due to the absence of neuroendocrine cells in the kidney and ureter. Therefore, little is known about the management and prognosis of renal carcinoid. Here, we report a case of a primary renal carcinoid tumor arising from a normal kidney in a 21-year-old man. He presented with a left renal mass, which was found accidentally. Abdominal computed tomography (CT) showed a 5.5 x 5.0-cm cystic mass with calcification. We suspected a cystic renal cell carcinoma and performed a laparoscopic radical nephrectomy. However, the histology revealed a well-differentiated neuroendocrine tumor. We concluded that it was a primary renal carcinoid tumor with no distant metastasis and did not administer chemotherapy or radiation therapy. He is recurrence-free after 8 months.
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