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. 2023 Feb 13;59(2):351. doi: 10.3390/medicina59020351

Table 1.

Types of malignant duodenal obstruction.

Types of MDO Level of the Obstruction
Type I Proximal to duodenal papilla
Type II At the level of duodenal papilla
Type III Distal to duodenal papilla

MDO—malignant duodenal obstruction.