Endoscopic ultrasound-guided transduodenal drainage using forward-viewing echoendoscope for appendiceal abscess.

Appendiceal abscesses sometimes require percutaneous drainage [1]. Recently, endoscopic ultrasound (EUS)-guided drainage through the intestinal tract has become possible, even in cases of pelvic or intra-abdominal abscesses resulting from lower gastrointestinal tract disease. However, this approach is usually performed through the rectum or sigmoid colon [2] [3] [4] [5], and its use is challenging for appendiceal abscesses because of their location. Herein, we report a case of appendiceal abscess successfully treated by EUS-guided transduodenal drainage using a forward-viewing echoendoscope.