Synchronous Clear Cell Renal Cell Carcinoma And Tubulocystic Renal Cell Carcinoma

Tubulocystic renal cell carcinoma (TCRCC) is a recently described rare subtype of RCC. To best of our knowledge less than 70 cases have been reported till date. The concurrent papillary RCC (PRCC) and TCRCC has been documented in literature, but the co-occurrence of clear cell RCC (CCRCC) and TCRCC is very rare. We are describing a rare case of incidentally detected TCRCC occurring with CCRCC in a 45 years old male who presented with high grade fever with chills and rigors. Grossly, there were two distinct tumors in the total nephrectomy specimen. The larger tumor displayed the histopathological features of CCRCC and the smaller tumor revealed the features of TCRCC.treatment in the present case.

A case of tubulocystic carcinoma of kidney and literature review / 肿瘤研究与临床

Objective To investigate the tubulocystic carcinoma (TC) of kidney in diagnosis and differential diagnosis,clinical and pathological features.Methods A case of TC was performed with HE and immunohistochemical staining,with review of the related literature.Results A man of 43 years old,who was found an occupying in the upper pole of the right kidney by B ultrasound,was performed ill-circumscribed of the right kidney.A gray solid ill-circumscribed mass was found within the renal parenchyma,which was sized of 1.5 cm × 1.5 cm × 1.0 cm.Microscopically,the tumor showed an invasive growth,and that it was composed of small tubular and vesicular structure closely spaced with slender fibrosis mesenchymal.The epithelial cells lining the tubules and cysts were flattened,cuboidal and hobnail cells,with abundant eosinophilic cytoplasm and obvious nucleolus of Fuhrman grade 3.The tumor showed positive of cytokeratin,CD10+++ and P504S+++,with low Ki-67 labeling index.Postoperative follow-up of 6 months,the patient showed no tumor recurrence and metastasis.Conclusions TC is a special subtype of renal cell carcinoma,with a tubular and cystic structure,high nuclear grade and rare mitotic.The differential diagnosis mainly includes other renal cystic lesions.The biological behavior of TC is indolent with less recurrence and distant metastasis.