An unusual occurrence of multiple primary malignant neoplasms: a case report and narrative review.

Introduction: Multiple primary malignant neoplasms (MPMNs) are cancers presenting distinct pathological types that originate from different tissues or organs. They are categorized as either synchronous or metachronous. Nowadays, the incidence of MPMN is increasing.

Sarcoid-like reaction and hypothyroidism induced by PD-1 inhibitor treatment in metastatic renal cell carcinoma: a case report and literature review.

Background: Pembrolizumab is among the approved treatments for a variety of cancer types, including clear cell renal cell carcinoma (ccRCC). It has contributed to enhancing the prognosis of renal cell carcinoma. However, it is essential to be aware of the numerous potential immune-related side effects associated with its use.

Metastasis of incidentally diagnosed renal cell carcinoma to the sacrum 7 years after partial nephrectomy: Case report and literature review.

Introduction: After undergoing partial nephrectomy for renal cell carcinoma (RCC), approximately 20-40 % of patients may develop either distant metastatic disease or locally recurring disease. Delayed occurrence of metastasis is an important aspect to consider in the management and monitoring of patients with renal cell carcinoma.

Case Presentation: A 69-years-old male who had been followed up for liver hemangioma, an incidental enhancing right renal mass was discovered which then revealed to be renal cell carcinoma on computed tomography scan.

A case of malignant glomus tumor (glomangiosarcoma) of the nasal cavity.

Glomus tumors are rare and usually benign. The malignant form (glomangiosarcoma) comprises <1% of all glomus tumors. There are limited reports that describe glomus tumors in the nasal cavity.