Hyperprogression: A Unique Phenomenon of Progression of Existing Tumor Secondary to Immunotherapy.

Immunotherapy is a relatively new approach for cancer treatment that has demonstrated prolonged survival by enhancing the body's immunologic response among advanced cancer patients. Although the benefits of immunotherapy have been well documented, potentially detrimental consequences such as pseudoprogression and hyperprogression have been identified. Hyperprogression is a tumor response in which the existing underlying tumor grows rapidly after initiating treatment with an immune checkpoint inhibitor.

A Case of Mucosa-Associated Lymphoid Tissue Lymphoma of the Bladder: An Extremely Rare Presentation.

Extranodal mucosa-associated lymphoid tissue (MALT) is a type of non-Hodgkin's lymphoma (NHL). It commonly involves the GI tract, but the involvement of the urinary bladder is very rare. It comprises less than 1% of bladder tumors and 0.