Renal pelvis and ureter

Sarcomatoid carcinoma of the upper urinary tract: clinical outcome and molecular characterization

“…Sarcomatoid carcinoma (carcinosarcoma) of the renal pelvis and/or upper ureter is a rare aggressive malignancy, fewer than 20 cases of which have been reported [1][2][3][4][5][6][7][8][9][10]. A number of names have been used to describe this neoplasm, including carcinosarcoma, metaplastic carcinoma, sarcomatoid carcinoma, malignant mesodermal mixed tumor, spindle cell carcinoma, and carcinoma with pseudosarcomatous change.…”

Primary Intraparenchymal Squamous Cell Carcinoma of the Kidney: A Rare and Unique Entity

“…Only few cases have been reported where no apparent aetiological factor could be detected [4, 7]. Our case notably lacked the association with such predisposing factors.…”

An Extremely Rare Kidney Tumor: Primary Intraparenchymal Squamous Cell Carcinoma

“…Among the etiological factors; a staghorn stone that is present in the kidney for a long time, recurrent urinary tract infection, smoking, schistosomiasis, exogenous or endogenous chemicals, vitamin A deficiency, and hormonal imbalance can be specified (7). In our case, none of these predisposing factors was observed.…”

“…Squamous metaplasia is the precursor of SCC, however, there are disagreements in the previous studies. Such disagreements may be engendered by the rare incidence of SSC of the upper urinary system (7). The histologic features of squamos carcinoma are keratotic cellular debris, pearl formation and intercellular bridges.…”

“…When a renal tumor is diagnosed as SCC, distinction between primary renal SCC and metastatic SCC should be done. In order to make this differentiation, the combination of clinical history, imaging and histopathological evaluation is needed (7). After metastatic SCC is excluded, differentiation between SCC of the renal pelvis and intraparenchymal SCC should also be done (10).…”