To evaluate the safety and efficacy of endoscopic full thickness biopsy for the diagnostic purpose of chronic intestinal pseudo-obstruction.
Patients with chronic pseudo intestinal obstruction or suspected chronic pseudo intestinal obstruction
Patients who are 18 years of age or older at the time of obtaining consent
Gender: Any
Patients for whom it is difficult to perform endoscopy
Patients who cannot obtain consent
Patients with serious renal, hepatic, or cardiac disease
Patients who are participating in other clinical research, except for observational research.