case_images: PMC6288573_01
case_images: Lateral view of pelvic MRI showing inflammatory changes involving mucosa of the anus, rectum, and internal sphincter.
case_images: CRIS2018-2151492.001.jpg
case_images: PMC6288573_01_CRIS2018-2151492.001.jpg
case_images: fig1
case_images: 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).
case_images: Hypercellular bone marrow aspirate showing marked excess of blasts.
case_images: CRIS2018-2151492.002.jpg
case_images: PMC6288573_01_CRIS2018-2151492.002.jpg
case_images: fig2
case_images: Several biopsies of the inflamed mucosa were also sent for histological analysis (Figure 2).
case_images: 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.
case_images: CRIS2018-2151492.003.jpg
case_images: PMC6288573_01_CRIS2018-2151492.003.jpg
case_images: fig3
case_images: Immunoperoxidase stains showed CD4+, CD68+, CD45+, and MPO+ (see Figures 3 and 4).
case_images: Neoplastic cells strongly express MPO.
case_images: CRIS2018-2151492.004.jpg
case_images: PMC6288573_01_CRIS2018-2151492.004.jpg
case_images: fig4
case_images: Immunoperoxidase stains showed CD4+, CD68+, CD45+, and MPO+ (see Figures 3 and 4).