Comparison of Needle Knife versus Scissors Forceps for Colorectal Endoscopic Submucosal Dissection: A Prospective Randomized Study.

Background And Aim: To evaluate the efficacy and safety of a grasping-type knife, called Clutch Cutter (CC), for colorectal endoscopic submucosal dissection (C-ESD).

Methods: This was a randomized prospective study. Patients who underwent C-ESD for colorectal neoplasms >20 mm and <50 mm in size were enrolled, dividing into two groups: ESD using needle type of dual knife alone (D-group) and circumferential incision using dual knife followed by submucosal dissection using CC (CC-group).

Endoscopic features of colorectal lymphoma according to histological type.

Background And Aim: This study aimed to investigate the relationship between the histological type of colorectal lymphoma and its endoscopic features.

Methods: We retrospectively analyzed patients with primary colorectal lymphoma who were diagnosed using colonoscopy and biopsy specimens at the National Cancer Center Hospital, Tokyo, Japan. The lesions were macroscopically classified into the following types via colonoscopy: polypoid, ulcerative, multiple lymphomatous polyposis, diffuse, and mixed.

Premedication of hemin for eradication therapy of in patients with porphyria.

Eradication therapy of may be safe if hemin has been intravenously administered in advance, even in patients with a history of recurrent acute porphyria attack.