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Hilar lymph node metastasis in renal cell carcinoma
K Yamashita1, M Yamamoto, H Nishimura
1Department of Chest Surgery, Saitama Cancer Center, Japan.
The Japanese Journal of Thoracic and Cardiovascular Surgery : Official Publication of the Japanese Association for Thoracic Surgery = Nihon Kyobu Geka Gakkai Zasshi
|May 4, 2000
Summary
Metastatic renal cell carcinoma (RCC) can spread to hilar lymph nodes, presenting as a lung mass without primary lung lesions. This case highlights lymphogenous spread as a potential pathway for RCC metastasis to the lung hilum.
Area of Science:
- Oncology
- Thoracic Surgery
- Medical Imaging
Background:
- Renal cell carcinoma (RCC) is a malignancy originating in the kidneys.
- Metastasis of RCC can occur through various pathways, including lymphatic and hematogenous spread.
- Hilar lymph node involvement is a critical factor in cancer staging and prognosis.
Observation:
- A 48-year-old male presented with a left hilar mass detected via chest X-ray and CT scan.
- The patient had a history of right nephrectomy for RCC seven years prior.
- Imaging revealed a hypervascular mass in the left hilum, with suspected invasion of the pulmonary artery and left main bronchus.
Findings:
- Histological examination confirmed metastatic renal cell carcinoma within the left hilar lymph node.
- The metastasis was confined to the lymph node, with no concurrent pulmonary parenchymal lesions.
- The metastatic pathway was hypothesized to be lymphogenous, potentially via retrograde lymphatic flow or the inferior pulmonary ligament.
Implications:
- This case underscores the possibility of isolated hilar lymph node metastasis from a prior renal cell carcinoma.
- It emphasizes the importance of considering extranodal metastasis in patients with a history of RCC.
- Understanding the lymphogenous spread pathway is crucial for accurate diagnosis and treatment planning in recurrent or metastatic RCC.