PMC6288573_01
Lateral view of pelvic MRI showing inflammatory changes involving mucosa of the anus, rectum, and internal sphincter.
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fig1
Following this, magnetic resonance imaging (MRI) was done which demonstrated inflammatory changes involving mucosa of the anus, rectum, and internal sphincter with no definite fistulous tract or collection (see Figure 1).
Hypercellular bone marrow aspirate showing marked excess of blasts.
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fig2
Several biopsies of the inflamed mucosa were also sent for histological analysis (Figure 2).
Anal tissue: H&E stain low power showing the tumor consisting of blasts with scant cytoplasm and round-oval nuclei with fine dispersed chromatin and distinct nucleoli. Mitotic figures are numerous.
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fig3
Immunoperoxidase stains showed CD4+, CD68+, CD45+, and MPO+ (see Figures 3 and 4).
Neoplastic cells strongly express MPO.
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fig4
Immunoperoxidase stains showed CD4+, CD68+, CD45+, and MPO+ (see Figures 3 and 4).