Publications by authors named "Keiichiro Izumi"

Renal autotransplantation is a rare surgical procedure designed to preserve renal function in patients with complex urinary system diseases or highly complex renal tumors. Between 2012 and 2023, four patients underwent ex vivo partial nephrectomy (PN) and autotransplantation for complex renal tumors at our hospital. Two patients had bilateral multifocal renal tumors, including von Hippel Lindau (VHL) disease and hybrid oncocytic chromophobe tumor (HOCT).

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Ipilimumab and nivolumab combination therapy is effective against unresectable or metastatic renal cell carcinoma. However, it is associated with many immune-related adverse events, including hypophysitis that is difficult to diagnose early because of non-specific initial symptoms. Herein, we report the case of a 54-year-old man with metastatic renal cell carcinoma who developed hypophysitis after receiving ipilimumab and nivolumab combination therapy.

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To confirm changes in urethral activity with age, both intravesical pressure and urethral perfusion pressure (UPP) were recorded and external urethral sphincter electromyography (EUS-EMG) was performed. A total of 33 female Sprague Dawley rats aged 3 months (young rats), 12 months (middle-aged rats), and 24 months (aged rats) were used. Bladder activity was evaluated using continuous cystometry.

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