Table 1. Characteristics of patients and procedures.

Patients, n. (%)	21
Male, n. (%)	9 (42.9)
Tumor localization:
Pancreatic head, n. (%)	14 (66.6)
Invasion of the papillary region, n. (%)	3 (14.2)
Distal cholangiocarcinoma, n. (%)	3 (14.2)
Duodenum infiltration of unknown diagnosis, n. (%)	1 (4.7)
Obstruction site
Distal choledocus, n. (%)	20 (95.8)
Middle choledocus, n. (%)	1 (4.7)
Cause of failed/unfeasible ERCP
Papilla non visualized, n. (%)	12 (57.2)
Neoplastic obstruction of the stomach, n. (%)	2 (9.5)
Stenosis of the choledocus inaccessible by guidewire, n. (%)	5 (23.8)
Other causes, n. (%)	2 (9.5)
LAMS access site positioning
Bulb, n. (%)	19 (90.48)
Gastric antrum, n. (%)	2 (9.52)

ERCP, endoscopic retrograde cholangiopancreatography; LAMS, lumen-apposing metal stent.