Fig. 1

Diagnosis of hereditary leiomyomatosis and renal cell cancer-associated renal cell carcinoma (HLRCC-RCC). A. CT revealed a large mass in the right kidney. B. Hematoxylin–eosin staining showed renal cell carcinoma with papillary and tubular structures. C. CT revealed multiple nodes in both lungs and the pleura. D. Approximately 20% of the tumor cells exhibited programmed cell death-ligand 1 (PD-L1) expression