PMC6083641_01
Endoscopic view approximately 6-7 cm from the anal verge showing a 15 mm bulging subepithelial lesion.
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fig1
On flexible sigmoidoscopy, the bulging submucosal lesion was again noted ~6-7 cm from the anal verge (Figure 1) and endoscopic ultrasound showed this mass to be a homogenous, hypoechoic lesion (0.79 cm X 2.98 cm) that was contiguous with the muscularis propria.
(a) Rectal FNA biopsy (H&E, 20X) with strips of benign colonic mucosa and the presence of giant cells, reactive macrophages, acute inflammatory cells, mucin, and foreign material. (b) Dark blue/purple dextranomer microspheres and hyaluronic acid (10X). (c) Dark blue/purple dextranomer microspheres and hyaluronic acid (40X).
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fig2
Under microscopy, the hospital pathologist described the rectal FNA samples as having clusters of reactive macrophages, acute inflammation, giant cells, mucin, and multiple, spherically shaped dark microparticles (Figures 2(a)-2(c)).