希少癌：膀胱癌における尿路上皮癌亜型と 特殊型（非尿路上皮癌）に備える.

The primary histological type of bladder cancer is urothelial carcinoma (UC), of which various subtypes, also known as variant histologies, account for about 20% of all bladder cancers. In addition to UC, there are also specialized types of bladder cancer (non-urothelial carcinoma), such as squamous cell carcinoma, adenocarcinoma, and neuroendocrine tumors (small-cell carcinoma). Although bladder cancer of both UC subtypes and special types is rare, it is relatively frequently encountered in daily practice. Clinical information on the disease, including its prognosis and susceptibility to treatment, is scarce and presents an unmet medical need. UC is a clinically important disease and should be prepared for in clinical practice, since UCs are frequently encountered at an advanced stage at the time of diagnosis, and the patient thus has a poor prognosis. In recent years, medical insurance has also covered cancer gene panel testing for "patients with solid tumors for which no standard treatment is available or has been completed, and for whom chemotherapy is highly likely to be indicated," including rare UC subtypes and special types. We must not only understand the treatment for UC subtypes and special types but also practice and understand oncogene panel tests. [ABSTRACT FROM AUTHOR]