Chromophobe renal cell carcinoma with sarcomatoid and heterologous osteosarcoma-like differentiation: a case report and literature review.

Chromophobe renal cell carcinoma (CRCC) is a subtype of renal cell carcinoma (RCC) with a favorable prognosis. Sarcomatoid differentiation in RCC is assumed to be the outcome of the parent tumor's dedifferentiation and associated with poorer prognosis. Sarcomatoid differentiation can be detected in CRCC as well as other subtypes, but the occurrence of divergent osteosarcoma-like components in sarcomatoid CRCC is extremely unusual.

Metastatic Perivascular Epithelioid Cell Tumor Of The Kidney: A Case Report With Emphasis On Response To The Tyrosine-Kinase Inhibitor Sunitinib.

Several case reports have provided most of the information available on perivascular epithelioid cell tumors, but with no consensus regarding diagnosis or treatment paradigms. Sunitinb is a VEGFR multitargeted tyrosine-kinase inhibitor that is regarded as a first-line treatment of clear cell-type metastatic renal-cell carcinoma after cytoreductive surgery. Our case was a 29-year-old male who presented with a metastatic left renal tumor and underwent left partial nephrectomy followed by adjuvant tyrosine kinase-inhibitor treatment.

Single Large Bladder Stone in a Young Male Adult with Primary Hyperparathyroidism.

Bladder stones are caused when minerals are built up in the bladder, especially if the bladder is incompletely emptied. These stones will pass while they are small. Otherwise, they get stuck to the bladder wall or ureter.

Upper Tract Urothelial Carcinoma in Ectopic Pelvic Kidney.

Upper tract urothelial carcinoma (UC) is an uncommon tumor. Ectopic kidney is also a rare entity. The combination of these two conditions is very rare.