PMC8025045_01
(A, B) Contrast-enhanced CT shows right RCC before nephrectomy. (C, D) Non-enhanced CT shows multiple right pleural tumors with pleural effusion. (E, F) Non-enhanced CT shows rapid growth of the pleural mass after one month.
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We encountered a 69-year-old man who had localized right pleural metastases after undergoing nephrectomy in September 2017 for right RCC (8.0 x 7.0 x 7.0 cm), clinical stage 3, clear cell type histology, grade 2 (Fig. 1, Fig. 2A-2C). At this time, CT scan revealed right pleural effusion and multiple pleural masses (Fig. 1C and D).
Histopathologic examinations of kidney and pleural specimens show primary and metastatic clear cell carcinoma. (A) Macroscopic image of the excised kidney tumor. (B): Hematoxylin-Eosin (H&E) staining of the kidney, x 40. (C): H&E staining of the kidney, x 200. (D) Macroscopic image of the excised pleural tumor. (E) H&E staining of the pleura, x 40. (F) H&E staining of the pleura, x 200.
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F). Finally, we performed intrathoracic tumor resection under general anesthesia and diagnosed histologically as pleural metastasis from clear cell type RCC (Fig. 2D-F).
Thoracoscopic shows multiple hemorrhagic soft encapsulated tumors.
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Thoracoscopy showed multiple reddish, soft, bleeding encapsulated tumors (Fig. 3).