PMC9149464_01
Extensive black spickled pigmetation on gastric mucosa.
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PMC9149464_01_crg-0016-0264-g01.jpg
F1
An esophagogastroduodenoscopy showed a hiatus hernia with Hill's classification grade 4, a 7-mm sessile polyp with a Paris classification of 0-Is which was removed by snaring, extensive gray to black speckles on the posterior wall of the gastric corpus, as well as the duodenum indicating possible gastric and duodenal pseudomelanosis, respectively (Fig. 1).
Microphotograph showing gastric mucosa showing brownish black pigment deposition within macrophages in the lamina propria. (H&E stain, x200).
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F2
The lamina propria had brownish-black pigment-laden macrophages (Fig. 2) and Perl's Prussian blue stain tested positive, confirming iron deposition (Fig. 3).