Direct observation of an exposed blood vessel in a colonic diverticulum using ultrathin endoscopy.

In recent years, cases of diverticular bleeding have become more common. Although identifying the bleeding diverticulum is difficult, it is even more difficult to identify the exposed blood vessels in the bleeding diverticulum. We experienced a case in which we succeeded in directly observing the exposed blood vessels of a sigmoid colon diverticulum using the ultrathin endoscope.

Endoscopic submucosal dissection for hypopharyngeal cancer simultaneous with immunotherapy for renal cell carcinoma.

We report a case of a man who was diagnosed with superficial hypopharyngeal cancer and recurrence of renal cell carcinoma in the duodenum, liver, and gluteus medius muscle simultaneously. He underwent endoscopic submucosal dissection for hypopharyngeal cancer in parallel with systemic immunotherapy for recurrent renal cell carcinoma, resulting in completely overcoming both malignancies. Endoscopic submucosal dissection is less invasive and can be performed in a shorter duration for treating superficial hypopharyngeal cancer compared with other treatment options, such as radiation therapy, chemotherapy, and surgery.