Gastroenterology Research, ISSN 1918-2805 print, 1918-2813 online, Open Access
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Case Report

Volume 5, Number 4, August 2012, pages 171-173

Pseudomelanosis Duodeni of Undetermined Etiology


Figure 1.
Figure 1. Esophagogastroduodenoscopy showing muliple dark pigmented spots in the second portion of the duodenum.
Figure 2.
Figure 2. Histological examination of a duodenal biopsy showing pigmented material (red arrow) deposited in the macrophages of the lamina propria.
Figure 3.
Figure 3. Positive Perls Prussian blue stain of duodenal biopsy showing blue color pigmentation (red arrow).